End of Support

Setting the Interval for Sending Synchronization Messages

To set the interval (in log seconds) for sending synchronization messages, use the ptp sync-message interval command. Value ranges and defaults vary based on the PTP mode of the switch.

Example

This command configures the interval for sending synchronization messages on the interface to 3 (8 seconds).

switch(config-if-Et5)# ptp sync-message interval 3
switch(config-if-Et5)#

Setting the PTP Transport Type

To set the PTP transport type, use the ptp transport command.

This command configures the PTP transport type for the interface to IPv4.
```
switch(config-if-Et5)# ptp transport ipv4
switch(config-if-Et5)#
```
This command configures the PTP transport type for the interface to IPv6.
```
switch(config-if)# ptp transport ipv6
switch(config-if)#
```

Setting the Local Priority of the Clock and Interfaces

To set the local priority of the clock and interfaces to control the topology, use the ptp local-priority command.

switch(config)# ptp local-priority 1
switch(config-if)# ptp local-priority 255

Setting up as a Slave to another PTP Device

Each interface may be configured with a candidate grantor IP address to send requests and potentially become the slave device to another PTP device. After configuration, the switch starts negotiating with the candidate grantor, and depending on the Announce messages received, it may start requesting Sync and Delay Response to sync the clock. Each grantor may be associated with a unicast negotiation profile. If the configuration omits the profile, the device uses the default interval of one second and a duration of 60 seconds for all message types. If the profile does not exist, the switch uses the default values until the profile gets added.

Use the ptp unicast-negotiation candidate-grantor command to set up the profile. The following commands set up the candidate grantor profile.

switch(config-if)# ptp unicast-negotiation candidate-grantor 10.0.0.1
switch(config-if)# ptp unicast-negotiation candidate-grantor 10.0.0.1 profile fastProfile

Setting up as a Master to another PTP Device

Each interface may be configured with a range of IP addresses of remote grantees to grant incoming requests and potentially become a master to another PTP device. By default, the interface denies incoming requests outside the configured range of IP addresses. Each grantee may be associated with a unicast negotiation profile. If the configuration omits the profile, the interface grants incoming requests with an interval of 0 or longer for all message types. If you specify a profile, it compares it to the configured interval. If the profile does not exist, the switch uses the default values until you add the profile.

Use the ptp unicast-negotiation remote-grantee command to set up the profile. The following commands set up the remote grantee profile.

switch(config-if)# ptp unicast-negotiation remote-grantee 10.0.0.1/24
switch(config-if)# ptp unicast-negotiation remote-grantee 10.0.0.1/24 profile fastProfile

Setting the masterOnly Flag

For ports that should not be a slave regardless of other attributes, use the ptp role master command.

switch(config-if)# ptp role master

Configuring the Unicast Profile

A Unicast negotiation profile may be configured to change message rates and durations. The following tables displays the default value and the configurable range of each value.


Field	Range	Default
Announce interval	[-3, 0]	0
Announce duration	[60, 1000]	60
Sync interval	[-7, 0]	0
Sync duration	[60, 1000]	60
Delay Response interval	[-7, 0]	0
Delay Response duration	[60, 1000]	60

When you apply a profile to a remote grantee on a Grant port, it uses the profile values to determine if the given request should be granted or denied. If the requested interval is shorter than the profile, the port denies the request. When a profile applies to a candidate grantor on a Request port, it requests the candidate grantor using the values in the profile.

The following configures a typical Unicast negotiation profile.

switch(config)# ptp unicast-negotiation profile fastProfile
switch(config-unicast-negotiation-profile-fastProfile)# announce interval -2
switch(config-unicast-negotiation-profile-fastProfile)# announce duration 500
switch(config-unicast-negotiation-profile-fastProfile)# sync interval -3
switch(config-unicast-negotiation-profile-fastProfile)# sync duration 300
switch(config-unicast-negotiation-profile-fastProfile)# delay-resp interval -3
switch(config-unicast-negotiation-profile-fastProfile)# delay-resp duration 300

Displaying Unicast Negotiation Configurations

The show ptp unicast-negotiation profile command displays all user configured profiles and their values.

(switch)# show ptp unicast-negotiation profile
Unicast Negotiation Profile fastProfile
Announce interval: 0.25 seconds
Announce duration: 500 seconds
Sync interval: 0.125 seconds
Sync duration: 300 seconds
Delay Response interval: 0.125 seconds
Delay Response duration: 300 seconds

The show ptp unicast-negotiation candidate-grantor command displays all configured candidate grantors, associated profile name and latest update.

(switch)# show ptp unicast-negotiation candidate-grantor
 Interface    Address      Profile       Grantor Status
----------- ---------- -------------- ------------------ 
 Ethernet1    4::1       fastProfile    Master
 Ethernet1    4::2       fastProfile    Candidate Master
 Ethernet2    4::2       fastProfile    Blacklisted

The show ptp unicast-negotiation remote-grantee command displays all configured remote grantees, associated profile name and latest update.

(switch)# show ptp unicast-negotiation remote-grantee 
Interface    Address      Profile
------------ ---------- -------------
 Ethernet1    4::1/96    fastProfile
 Ethernet1    4::2/96    fastProfile
 Ethernet2    4::2/96    fastProfile

The show ptp unicast-negotiation granted command displays to which remote grantees each port has granted and some detail.

(switch)# show ptp unicast-negotiation granted  
Interface    Address    Message     Interval        Duration       Expires In
----------- ---------- ------------ -------------- -------------- -------------
 Ethernet2    4::1       Announce    0.25 seconds    300 seconds    30 seconds
 Ethernet2    4::1       Sync        2.0 seconds     300 seconds    30 seconds

The show ptp unicast-negotiation requested command displays to which candidate grantors each port has requested and some detail.

(switch)# show ptp unicast-negotiation requested  
 Interface    Address    Message     Interval        Duration       Expires In
------------ --------- ----------- --------------- -------------- -------------
 Ethernet2    4::2       Announce    0.25 seconds    600 seconds    250 seconds
 Ethernet2    4::2       Sync        2.0 seconds     300 seconds    denied

The show ptp local-clock command displays the clock local priority in G8275.2 mode.

(switch)# show ptp local-clock  
 PTP Mode: Boundary Clock
Clock Identity: 0x00:1c:73:ff:ff:00:72:40
Clock Domain: 44
Number of PTP ports: 64
Priority1: 128
Priority2: 128
Local Priority: 128
Clock Quality:
   Class: 248
   Accuracy: 0x30
   OffsetScaledLogVariance: 0xffff
Offset From Master: -5
Mean Path Delay: 416 nanoseconds
Steps Removed: 1
Skew: 1.00000006399
Last Sync Time: 23:42:33 UTC Nov 01 2018
Current PTP System Time: 23:42:33 UTC Nov 01 2018

The show ptp interface command displays the interface local priority in G8275.2 mode.

Note: The Announce, Sync and Delay request message intervals are for multicast mode. Since G8275.2 operates in unicast mode, those values should be ignored.

(switch)# show ptp interface Ethernet 42 | nz  Interface Ethernet42
PTP: Enabled
Port state: Slave
Sync interval: 1.0 seconds
Announce interval: 2.0 seconds
Announce interval timeout multiplier: 3
Delay mechanism: end to end
Delay request message interval: 0.25 seconds
Local Priority: 128
Transport mode: ipv4
Announce messages received: 2964
Sync messages received: 2558
Follow up messages received: 2558
Delay request messages sent: 2540
Delay response messages received: 2540
Signaling messages sent: 98
Signaling messages received: 101

Configuring a PTP Grandmaster Clocks List

In a PTP network, multiple clocks may be capable of serving as the primary source of time. The Best Master Clock Algorithm (MBCA) to select the single best clock to become the single active Grandmaster (GM) for the PTP domain. Typically, the list specifies the MAC addresses or EUI-64 bit number of clocks on the network.

To delete the GM clocks list, use the no version of the command to delete the GM list. If no list exists, EOS considers all potential GM clocks by default.

To add the MAC addresses, 00:00:79:ff:ff:01:00:00 through 00:00:79:ff:ff:03:00:00, use the following commands:

switch(config)# ptp grandmasters
switch(config-ptp-grandmasters)# clock-identity accepted 00:00:79:ff:ff:01:00:00
switch(config-ptp-grandmasters)# clock-identity accepted 00:00:79:ff:ff:02:00:00
switch(config-ptp-grandmasters)# clock-identity accepted 00:00:79:ff:ff:03:00:00

To delete a clock from the acceptable grandmaster list, use the following commands:

switch(config)# ptp grandmasters
switch(config-ptp-grandmasters)# no clock-identity accepted 00:00:79:ff:ff:01:00:00

To delete the entire list, use the no version of the command:

switch(config)# no ptp grandmasters

Displaying Grandmaster List Information

When configured and other announce messages from clocks rejected, the messages count towards the drop counters.

switch# show ptp interface ethernet4 counters drop
   Endpoint       Dir       Reason                                                   Count                  Last Seen
-------------- --------- -------------------------------------------------------- ----------- -----------------------
   Et4            rx        Announce message with less than foreign master               1    2025-10-01 UTC 02:59:05
                            threshold value.
   Et4            rx        Announce message with non-accepted grandmaster                  32     2025-10-01 UTC 03:00:17
                            clock identity.
   Et4            rx        Follow up message with received port is not slave.          60    2025-10-01 UTC 03:00:18
   Et4            rx        Sync message with received port is not slave.               60    2025-10-01 UTC 03:00:18

Viewing PTP Settings and Status

The following commands display the status of the switch PTP server connections:

Displaying General PTP Information
Displaying PTP Local Clock and Offset
Displaying PTP Masters Information
Displaying PTP Clock Properties
Displaying PTP Information for all Interfaces
Displaying PTP Interface Counters
Displaying PTP Foreign Master
Displaying PTP Monitoring Information
Displaying PTP Source IP

Displaying General PTP Information

To display general Precision Time Protocol (PTP) information, use the show ptp command.

switch# show ptp
PTP Mode: gptp - Generalized PTP Clock
Clock Identity: 2001:0DB8:73:ff:ff:26:fd:90
Grandmaster Clock Identity: 2001:0DB8:96:ff:fe:6c:ed:02
Number of slave ports: 1
Number of master ports: 6
Slave port: Ethernet33
Mean Path Delay (nanoseconds): 718
Steps Removed: 1
Neighbor Rate Ratio: 1.00000007883
Rate Ratio: 1.00000007883
Interface  State    ASTime  Since LastNeighbor Mean        Path        Residence 
Capable    Changed  Rate    Ratio              Delay (ns)  Time (ms) 
---------  -------- ------- ------------------ ----------- ----------- --------- 
Et1        Disabled No      Never              1.0         00
Et2        Disabled No      Never              1.0         00
Et3        Disabled No      Never              1.0         00
Et4        Disabled No      Never              1.0         00
Et5        Disabled No      Never              1.0         00
Et6        Disabled No      Never              1.0         00
Et7        Master   Yes                        0:21:08     1.000000094200

Displaying PTP Clock Properties

To display PTP clock properties, use the Displaying PTP Clock Properties command.

switch# show local-clock time-properties
Current UTC offset valid: False
Current UTC offset: 0
Leap 59: False
Leap 61: False
Time Traceable: False
Frequency Traceable: False
PTP Timescale: False
Time Source: 0x0
switch#

Displaying PTP Foreign Master

To display information about foreign masters (PTP sources not designated as the switch's master from which the switch has received sync packets), use the show ptp foreign-master-record command.

switch# show ptp foreign-master-record
No Foreign Master Records
switch#

Displaying PTP Information for all Interfaces

To display PTP information for specified interfaces, use the show ptp interface command.

switch# show ptp interface
Interface Ethernet1
PTP: Disabled
Port state: Disabled
Sync interval: 1.0 seconds
Announce interval: 2.0 seconds
Announce interval timeout multiplier: 3
Delay mechanism: end to end
Delay request message interval: 32.0 seconds
Transport mode: ipv4

Interface Ethernet5
PTP: Disabled
Port state: Disabled
Sync interval: 8.0 seconds
Announce interval: 2.0 seconds
Announce interval timeout multiplier: 5
Delay mechanism: peer to peer
Peer delay request message interval: 8.0 seconds
Peer Mean Path Delay: 0
Transport mode: ipv4

Displaying PTP Interface Counters

To display PTP interface counters for specified interfaces, use the show ptp interface counters command.

switch# show ptp interface ethernet 5 counters 
Interface Ethernet5
Announce messages sent: 0
Announce messages received: 0
Sync messages sent: 0
Sync messages received: 0
Follow up messages sent: 0
Follow up messages received: 0
Delay request messages sent: 0
Delay request messages received: 0
Delay response messages sent: 0
Delay response messages received: 0
Peer delay request messages sent: 0
Peer delay request messages received: 0
Peer delay response messages sent: 0
Peer delay response messages received: 0
Peer delay response follow up messages sent: 0
Peer delay response follow up messages received: 0

Displaying PTP Local Clock and Offset

To display the local PTP clock and offset, use the show ptp local-clock command.

switch# show ptp local-clock
PTP Mode: Boundary Clock
Clock Identity: 0x00:1c:73:ff:ff:1e:83:24
Clock Domain: 1
Number of PTP ports: 24
Priority1: 128
Priority2: 128
Clock Quality:
   Class: 248
   Accuracy: 0x30
   OffsetScaledLogVariance: 0xffff
Offset From Master: 0
Mean Path Delay: 0
Steps Removed: 0

Displaying PTP Masters Information

To display the PTP clocks master and grandmaster identity and configuration, use the show ptp masters command.

switch# show ptp masters
Parent Clock:
Parent Clock Identity: 0x00:1c:73:ff:ff:00:72:40
Parent Port Number: 0
Parent IP Address: N/A
Observed Parent Offset (log variance): N/A
Observed Parent Clock Phase Change Rate: N/A

Grandmaster Clock:
Grandmaster Clock Identity: 0x00:1c:73:ff:ff:00:72:40
Grandmaster Clock Quality:
   Class: 248
   Accuracy: 0x30
   OffsetScaledLogVariance: 0xffff
   Priority1: 128
   Priority2: 128

Displaying PTP Monitoring Information

To display the list of up to 100 recorded entries of offset from master, mean path delay and skew values, the current PTP mode, whether or not the feature is enabled, the number of entries displayed, and the configured thresholds for each metric, use the show ptp monitor command. Entries are sorted by the system time at which the value was calculated, starting with the most recent data at the top.

switch# show ptp monitor 
PTP Mode: Boundary Clock 
Ptp monitoring: enabled 
Number of entries: 5 
Offset from master threshold: 1500 
Mean path delay threshold: not configured 
Skew threshold: 0.5 
Interface  Time                          Offset from   Mean Path    Skew 
                                         Master (ns)   Delay (ns) 
---------- ----------------------------- ------------ ------------- ----------- 
Et8        21:23:12.901 UTC Feb 22 2018  71            5849         1.003159918 
Et1        21:23:12.901 UTC Feb 22 2018  113           3672         1.004990621 
Et2        21:23:12.901 UTC Feb 22 2018  706           7799         1.002744199 
Et1        21:23:12.901 UTC Feb 22 2018  803           5861         1.003432049 
Et1        21:23:12.901 UTC Feb 22 2018  610           3415         0.998974658

Displaying PTP Source IP

To display PTP IP source information, use the show ptp source ip command.

switch# show ptp source ip
PTP source IP: 10.0.2.1

Precision Time Protocol (PTP) Commands

PTP Show Commands

show ptp foreign-master-record
show ptp interface
show ptp interface counters
show ptp local-clock
show ptp masters
show ptp monitor
show ptp source ip
show ptp unicast-negotiation
show ptp unicast-negotiation profile
show ptp

ptp announce interval

The ptp announce interval command configures the interval at which the configuration mode interface sends PTP announce messages. The no ptp announce interval command resets the announce interval to its default of 1 (2 seconds).

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp announce interval log_interval

no ptp announce interval

default ptp announce interval

Parameters

log_interval The number of log seconds between PTP announce messages (base 2 log (seconds)). Value ranges from -3 (1/8 second) to 4 (16 seconds); default value is 1 (2 seconds).

Examples

These commands set the interval between PTP announce messages sent by interface ethernet 5 to 4 seconds.

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp announce interval 2
switch(config-if-Et5)#

These commands reset the PTP announce interval on interface ethernet 5 to the default value of 1 (2 seconds).

switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp announce interval
switch(config-if-Et5)#

ptp announce timeout

The ptp announce timeout sets the timeout multiplier for the configuration-mode interface. The timeout multiplier is the number of announcement intervals that the interface will wait without receiving a PTP announce message before a timeout occurs; the range is from 2 to 255. The default multiplier is 3, which results in a 6-second timeout interval when the announce interval is set to the default of 2 seconds. To configure the announce interval, use the ptp announce interval command.

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp announce timeout multiplier

no ptp announce timeout

default ptp announce timeout

Parameter

multiplier Number of announce intervals after which the interface will time out if it does not receive a PTP announce message. The range is from 2 to 255; default value is 3.

Examples

This command sets the timeout multiplier for interface ethernet 5 to 5. This means that the interface will time out if it doesnt receive a PTP announce message within five announce intervals.
```
switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp announce timeout 5
switch(config-if-Et5)#
```

These commands reset the PTP timeout interval on interface ethernet 5 to the default value of 3.

switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp announce timeout 
switch(config-if-Et5)#

ptp delay-mechanism

The ptp delay-mechanism command configures the delay mechanism in boundary clock mode. The no ptp delay-mechanism command disables the feature.

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp delay-mechanism mech_type

no ptp delay-mechanism

default ptp delay-mechanism

Parameters

mech_type The delay mechanism. Options include the following:

e2e end-to-end delay mechanism.
p2p peer-to-peer mechanism.

Examples

This command sets the delay mechanism to peer-to-peer in the boundary clock mode.

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp delay-mechanism p2p
switch(config-if-Et5)#

This command sets the delay mechanism to end-to-end in the boundary clock mode.

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp delay-mechanism e2e
switch(config-if-Et5)#

This command removes the delay mechanism configuration from Ethernet 5.

switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp delay-mechanism e2e
switch(config-if-Et5)#

ptp delay-req interval

The ptp delay-req interval command specifies the time in log seconds recommended to the slave devices to send delay request messages. You must enable PTP on the switch first and configure the source IP address for PTP communication. The no ptp delay-req interval command resets the interval to its default of 5 (32 seconds).

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp delay-req interval log_interval

no ptp delay-req interval

default ptp delay-req interval

Parameter

log_interval The range is -1 to 8 log seconds (base 2 log (seconds)). The default is 5 (32 seconds).

Examples

These commands set the minimum interval allowed between PTP delay request messages on interface ethernet 5 to 3 (8 seconds).
```
switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp delay-request interval 3
switch(config-if-Et5)#
```

These commands reset the minimum interval allowed between PTP delay-request messages to the default of 5 (32 seconds).

switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp delay-request interval
switch(config-if-Et5)#

ptp domain

The ptp domain command sets the domain number to use for the clock. The no ptp domain command resets or restores the domain to the default number 0.

Command Mode

Global Configuration

Command Syntax

ptp domain domain_number

no ptp domain

default ptp domain

Parameter

domain_number Value ranges from 0 to 255. Default number is 0.

Examples

This command shows how to configure domain 1 for use with a clock.
```
switch(config)# ptp domain 1
switch(config)#
```
This command removes the configured domain 1 for use with a clock.
```
switch(config)# no ptp domain 1
switch(config)#
```

ptp enable

The ptp enable command enables PTP on the interface. The no ptp enable command disables PTP on the interface.

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp enable

no ptp enable

default ptp enable

Examples

This command enables PTP on interface ethernet 5.

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp enable

This command disables PTP on Ethernet interface 5.

switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp enable

ptp forward-v1

The ptp forward-v1 command configures the switch to forward Precision Time Protocol version 1 packets as regular multicast traffic. By default, PTP v1 packets are trapped by the CPU, logged and discarded.

The no ptp forward-v1 and default ptp forward-v1 commands restore the default forwarding behavior by removing the corresponding ptp forward-v1 command from running-config.

Command Mode

Global Configuration

Command Syntax

ptp forward-v1

no ptp forward-v1

default ptp forward-v1

Examples

This command configures the switch to forward PTP v1 packets as regular multicast traffic.
```
switch(config)# ptp forward-v1
switch(config)#
```
This command configures the switch to log and discard PTP v1 packets.
```
switch(config)# no ptp forward-v1
switch(config)#
```

ptp grandmasters

The ptp grandmasters command in the PTP Configuration Mode allows the configuration of a list of grandmaster clocks for PTP. Typically, the list specifies the MAC addresses or EUI-64 bit number of clocks on the network.

To delete the GM clocks list, use the no version of the command to delete the GM list. If no list exists, EOS considers all potential GM clocks by default.

To delete a single clock, use the no ptp grandmasters clock-identity accepted address_format.

Command Mode

PTP Configuration

Command Syntax

ptp grandmasters clock-identity accepted address_format

no ptp grandmasters

Parameters

ptp grandmasters - Specify creating a list of Grandmasters clocks.
clock-identity accepted - Specify the clock identity accepted.
address_format - Specify the clock in MAC address format (IPv4) or EUI-64 bit format (IPv6).

Example

To add the MAC addresses, 00:00:79:ff:ff:01:00:00 through 00:00:79:ff:ff:03:00:00, use the following commands:

switch(config)# ptp grandmasters
switch(config-ptp-grandmasters)# clock-identity accepted 00:00:79:ff:ff:01:00:00
switch(config-ptp-grandmasters)# clock-identity accepted 00:00:79:ff:ff:02:00:00
switch(config-ptp-grandmasters)# clock-identity accepted 00:00:79:ff:ff:03:00:00

To delete a clock from the acceptable grandmaster list, use the following commands:

switch(config)# ptp grandmasters
switch(config-ptp-grandmasters)# no clock-identity accepted 00:00:79:ff:ff:01:00:00

To delete the entire list, use the no version of the command:

switch(config)# no ptp grandmasters

ptp hold-ptp-time

The ptp hold-ptp-time command configures the PTP offset hold time in seconds. The no ptp hold-ptp-time command resets or restores the PTP hold time to the default value.

Command Mode

Global Configuration

Command Syntax

ptp hold-ptp-time offset

no ptp hold-ptp-time

default ptp hold-ptp-time

Parameter

offset Value ranges from 0 to 86400.

Examples

This command shows how to configure the PTP offset hold time.
```
switch(config)# ptp hold-ptp-time 600
switch(config)#
```
This command resets or restores the PTP offset hold time to the default value.
```
switch(config)# no ptp hold-ptp-time
switch(config)#
```

ptp local-priority

The ptp local-priority command configures the local priority of the clock and interfaces to control the topology.

Command Mode

Interface-Ethernet Configuration

Command Syntax

ptp local-priority PRIORITY_NUM

Parameter

PRIORITY_NUM The priority number from 1 to 255.

Example

This command sets the priority for the subinterface.

switch(config)# ptp local-priority 1
switch(config-if)# ptp local-priority 255

ptp mode

The ptp mode command configures the Precision Time Protocol (PTP) packet forwarding mode for the switch. By default, PTP is disabled globally, and the mode must be changed to use PTP on switch interfaces.

The no ptp mode and default ptp mode commands return the forwarding mode to disabled by removing the ptp mode command from running-config.

Command Mode

Global Configuration

Command Syntax

ptp mode mode_name

no ptp mode

default ptp mode

Parameters

mode_name Default mode is disabled. Options include:

boundary one-step The One-Step PTP Boundary Clock (BC) streamlines the PTP synchronization process by embedding the precise OriginTimestamp directly into the PTP sync message's originTimestamp field, thereby eliminating the need for a separate Follow-Up message. This optimization reduces control plane traffic, enabling the BC to support more PTP master ports while maintaining full functionality.
- disabled The default mode. PTP is disabled, and the device forwards all PTP packets as normal traffic.
- e2etransparent one-step The device acts as an end-to-end transparent clock, synchronizing all ports to a connected master clock and updating the time interval field of forwarded PTP packets using switch residence time. Add the one-step parameter to handle PTP packets in the forwarding plane and remove scaling limitations such as packet drops due to high packet intervals and reduces CPU utilization.
- p2ptransparent The device acts as a peer-to-peer transparent clock, synchronizing all ports to a connected master clock and updating the time interval field of forwarded PTP packets using switch residence time and inbound path delays.
- gptp The device runs generalized Precision Time Protocol (gPTP), participating in the best master clock algorithm but also updating the interval field of forwarded PTP packets using switch residence time and inbound path delays.

Examples

This command configures the switch to act as a One-Step PTP Boundary Clock (BC).
```
switch(config)# ptp mode boundary one-step
switch(config)#
```
These commands configure the switch to operate as a one-step end-to-end transparent clock. This configuration enables both ingress and egress timestamping for PTP packets.
```
switch#configure
switch(config)#ptp mode e2etransparent one-step
switch(config)#interface Ethernet1/1
switch(conf-if-Et1/1)#ptp enable
```
Note: Enabling PTP on an interface is required for the switch to apply both ingress and egress timestamping to PTP packets. Accurate calculation of the correction field depends on PTP being enabled on both the ingress and egress interfaces.

This command restores PTP to disabled mode.

switch(config)# no ptp mode
switch(config)#

ptp monitor threshold mean-path-delay

Mean path delay is the mean time in nanoseconds that PTP packets take to travel between PTP master and slave. The ptp monitor threshold mean-path-delay command configures the mean-path-delay threshold in nanoseconds. When this threshold is configured, a Syslog message is generated if the value of the most recently calculated mean path delay is greater than or equal to this value.

The no ptp monitor threshold mean-path-delay and default ptp monitor threshold mean-path-delay commands clear the threshold value and prevent further Syslog messages from being generated for this parameter.

Command Mode

Global Configuration

Command Syntax

ptp monitor threshold mean-path-delay threshold

no ptp monitor threshold mean-path-delay

default ptp monitor threshold mean-path-delay

Parameter

threshold threshold in nanoseconds. Values range from 0 to 1000000000 (1 second).

Example

This command sets a mean-path-delay threshold value of 2000 nanoseconds.

switch(config)# ptp monitor threshold mean-path-delay 2000

ptp monitor threshold offset-from-master

PTP offset is the difference in nanoseconds between master and slave time. The ptp monitor threshold offset-from-master command configures the offset-from-master threshold in nanoseconds. A Syslog message is generated if the most recently calculated time offset from the PTP master is outside of the range (-<threshold>, <threshold>). The maximum offset threshold is one second.

The no ptp monitor threshold offset-from-master and no ptp monitor threshold offset-from-master commands clear the threshold value and prevents further Syslog messages from being generated for this parameter.

Command Mode

Global Configuration

Command Syntax

ptp monitor threshold offset-from-master threshold

no ptp monitor threshold offset-from-master

default ptp monitor threshold offset-from-master

Parameter

threshold Offset threshold value in nanoseconds. Values range from 0 to 1000000000.

Example

This command sets an offset-from-master threshold value of 500 nanoseconds.

switch(config)# ptp monitor threshold offset-from-master 500 
switch(config)#

ptp monitor threshold skew

PTP skew is the clock frequency difference between master and slave. The ptp monitor threshold skew command configures the value of the skew-threshold percentage. A Syslog message is generated if the value of the most recently calculated skew is not in the range (1/(1+threshold), 1*(1+threshold)).

The no ptp monitor threshold skew and default ptp monitor threshold skew commands clear the threshold value and prevent further Syslog messages from being generated for this parameter.

Command Mode

Global Configuration

Command Syntax

ptp monitor threshold skew threshold

no ptp monitor threshold skew

default ptp monitor threshold skew

Parameter

threshold skew percentage threshold represented as a double precision (16 digit) real number ranging from 0 (0%) to 10 (1000%).

Example

This command sets a skew threshold value of 5 (500%).

switch(config)# ptp monitor threshold skew 5
switch(config)#

ptp monitor

The ptp monitor command enables and disables PTP monitoring on the switch. When PTP monitoring is enabled, the switch records PTP status and configuration information (which can be viewed using the show ptp monitor command) and generates Syslog messages for metrics whose threshold values have been configured. PTP monitoring is enabled by default.

The no ptp monitor command disables the PTP monitoring and clears all the recorded data from running-config.

Command Mode

Global Configuration

Command Syntax

ptp monitor

no ptp monitor

Related Commands

ptp monitor threshold mean-path-delay
ptp monitor threshold offset-from-master
ptp monitor threshold skew
show ptp monitor

Example

This command disables ptp monitor PTP monitoring on the switch and clears all the recorded data.

switch(config)# ptp monitor
switch(config)#

ptp pdelay-neighbor-threshold

The ptp pdelay-neighbor-threshold command configures the propagation delay threshold above which the switch will consider the neighbor connected to this port to be incapable of participating in generalized Precision Time Protocol (gPTP).

The no ptp pdelay-neighbor-threshold and default ptp pdelay-neighbor-threshold commands restore the threshold to 100000 nanoseconds by removing the corresponding ptp pdelay-neighbor-threshold command from running-config.

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp pdelay-neighbor-threshold link_prop

no ptp pdelay-neighbor-threshold

default ptp pdelay-neighbor-threshold

Parameter

link_prop Threshold in nanoseconds. Value ranges from 0 to 10000000000 (ten billion). Default is 100000.

Examples

These commands set the link propagation delay threshold on interface ethernet 5 to 200000 nanoseconds.

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp pdelay-neighbor-threshold 200000
switch(config-if-Et5)#

These commands restore the link propagation delay threshold on interface ethernet 5 to its default value of 100000 nanoseconds.
```
switch(config)# interface ethernet 5s
witch(config-if-Et5)# no ptp pdelay-neighbor-threshold
switch(config-if-Et5)#
```

ptp pdelay-req interval

The ptp pdelay-req interval command configures the interval between Precision Time Protocol peer delay-request messages. The no ptp pdelay-req interval command removes the configuration.

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp pdelay-req interval log_interval

no ptp pdelay-req interval

default ptp pdelay-req interval

Parameter

log_interval The log interval in seconds (base 2 log (seconds)). Value ranges from 0 to 5.

Examples

This command shows how to configure the interval allowed between PTP peer delay request messages on interface Ethernet 5.
```
switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp pdelay-request interval 3
switch(config-if-Et5)#
```
This command removes the configure the interval allowed between PTP peer delay request messages on interface Ethernet 5.
```
switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp pdelay-request interval
switch(config-if-Et5)#
```

ptp priority1

The ptp priority1 command configures the priority 1 value for advertising the switchs PTP clock. Priority 1 is the most significant of the six factors used by devices in the selection of a master clock. Lower values indicate higher priority.

The no ptp priority1 and default ptp priority1 commands restore the priority 1 default setting of 128.

Command Mode

Global Configuration

Command Syntax

ptp priority1 priority_rate

no ptp priority1

default ptp priority1

Parameter

priority_rate Value ranges from 0 to 255. Default is 128.

Examples

This command sets the priority 1 level for the switchs PTP clock to 120.
```
switch(config)# ptp priority1 120
switch(config)#
```
This command restores the default priority 1 level of 128.
```
switch(config)# no ptp priority1
switch(config)#
```

ptp priority2

The ptp priority2 command sets the priority 2 value for the clock. The range is from 0 to 255. Priority 2 is the fifth most significant of the six factors used by devices in the selection of a master clock. Lower values indicate higher priority.

The no ptp priority2 and default ptp priority2 commands restore the priority 2 default setting of 128.

Command Mode

Global Configuration

Command Syntax

ptp priority2 priority_rate

no ptp priority2

default ptp priority2

Parameter

priority_rate Specifies the priority 2 level for the PTP clock. Value ranges from 0 to 255; default value is 128.

Examples

This command sets the priority 2 level for the switchs PTP clock to 120.
```
switch(config)# ptp priority2 120
switch(config)#
```
This command restores the default priority 2 level of 128.
```
switch(config)# no ptp priority2 
switch(config)#
```

ptp role

The ptp role command configures a port to operate either in the master mode or the dynamic mode when it is executed in the interface configuration mode.

The no ptp role command removes the master or dynamic mode if it was previously configured on an interface.

Command Mode

Interface-Ethernet Configuration

Command Syntax

ptp role [dynamic | master]

no ptp role

default ptp role

Parameters

dynamic the dynamic mode.
master the master clock mode that has the most precise time.

Related Commands

ptp enable
ptp enable
show ptp interface

Examples

This command configures a port to operate in the master mode for interface ethernet 1.
```
switch(config)# interface ethernet 1
switch(config-if-Et1)# ptp role master
```
This command configures a port to operate in the dynamic mode for interface ethernet 1.
```
switch(config)# interface ethernet 1
switch(config-if-Et1)# ptp role dynamic
```

ptp source

The ptp source command configures the source IP address for all PTP packets. The IP address can be in IPv4 or IPv6 format. The no ptp source ip command removes this configuration.

Command Mode

Global Configuration

Command Syntax

ptp source ip {ip|ipv6} ip_addr

no ptp source ip

default ptp source ip

Parameters

ip specifies an IPv4 source address.

ipv6 specifies an IPv6 source address.

ip_addr the source IP address.

Examples

This command configures the source IP address 10.0.2.1 for all PTP packets.
```
switch(config)# ptp source ip 10.0.2.1
switch(config)#
```
This command configures the source IP address 2001:db8:ac10:fe01:: for all PTP packets.
```
switch(config)# ptp source ip 2001:db8:ac10:fe01::
switch(config)#
```
This command removes any configured source IP address for all PTP packets.
```
switch(config)# no ptp source ip
switch(config)#
```

ptp sync timeout

A PTP synchronization timeout occurs if a sync message is not received for a specified period of time, calculated as a multiple of the PTP sync-message interval. The ptp sync timeout command configures the sync timeout multiplier. The range is 2 to 255, with a default of 20 (20 times the sync interval). To configure the sync interval, use the ptp sync-message interval command.

The no ptp sync timeout and default ptp sync timeout commands restore the PTP sync timeout multiplier to its default value of 20.

Command Mode

Interface-Ethernet Configuration

Command Syntax

ptp sync timeout interval_multiplier

no ptp sync timeout

default ptp sync timeout

Parameter

interval_multiplier The number of sync intervals that must pass without the configuration mode interface receiving a PTP sync message before a timeout occurs. Value ranges from 2 to 255. Default value is 20.

Example

These commands configure the sync timeout on interface ethernet 5 to ten times the configured sync interval.

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp sync timeout 10
switch(config-if-Et5)#

ptp sync-message interval

The ptp sync-message interval command configures the time for sending synchronization messages by specifying its log2 value. Default values and ranges depend on the PTP mode, which is set using the ptp mode command.

The no ptp sync-message interval and default ptp sync-message interval commands restore the sync interval to its default (1 second in boundary mode, 1/8 second in gptp mode) by removing the corresponding ptp sync-message interval command from running-config.

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp sync-message interval log_interval

no ptp sync-message interval

default ptp sync-message interval

Parameter

log_interval The interval between PTP synchronization messages sent from the master to the slave (base 2 log (seconds)). Values vary according to PTP mode: in boundary mode, the range is from -7 (1/128 second) to 3 (8 seconds) and the default value is 0 (1 second). In gptp mode, the range is from -3 (1/8 second) to 17 (131072 seconds, approximately 36 hours) with a default of -3.

Examples

These commands set the interval for PTP synchronization messages on interface ethernet 5 to 3 (8 seconds).

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp sync-message interval 3
switch(config-if-Et5)#

In boundary mode, these commands restore the interval for PTP synchronization messages on interface ethernet 5 to its default of 0 (1 second).
```
switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp sync-message interval
switch(config-if-Et5)#
```

ptp transport

The ptp transport command configures the PTP transport type for a specific interface. Any values set in interface PTP configuration mode override the settings in the PTP configuration profile associated with the interface. The no ptp transport command removes the stetting from the running-config.

Command Mode

Interface-Ethernet Configuration

Interface-Port Channel Configuration

Command Syntax

ptp transport transport_type

no ptp transport

default ptp transport

Parameters

transport_type The transport mode in boundary clock mode. Options include:

ipv4 The IPv4 address used as the transport type on the interface.
ipv6 The IPv6 address used as the transport type on the interface.
layer2 The Layer 2 protocol used as the transport type on the interface.

Examples

This command overrides the transport type in the profile and sets it to be IPv4 for the interface.

switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp transport ipv4
switch(config-if-Et5)#

This command removes the interval for PTP synchronization messages on interface Ethernet 5.

switch(config)# interface ethernet 5
switch(config-if-Et5)# no ptp transport 
switch(config-if-Et5)#

ptp ttl

The ptp ttl command configures the Time To Live (TTL) value of the PTP packets. The no ptp ttl resets the TTL value to the default value of 1 hop by removing the ptp ttl command from the running-config.

Command Mode

Global Configuration

Command Syntax

ptp ttl hop_count

no ptp ttl

default ptp ttl

Parameter

hop_count The TTL value measured in hops. Value ranges from 1 to 255, default is 1.

Examples

This command sets the time to live of the PTP packets to 60 hops.
```
switch(config)# ptp ttl 60
switch(config)#
```
This command resets the time to live of the PTP packets to the default value of 1 hop.
```
switch(config)# no ptp ttl
switch(config)#
```

ptp unicast-negotiation

The ptp unicast-negotiation command configures the master slave profiles for PTP devices.

Command Mode

Interface-Ethernet Configuration

Command Syntax

ptp unicast-negotiation

ptp unicast-negotiation remote-grantee

Parameters

candidate-grantor become slave to another PTP device.
remote-grantee become master to another PTP device.

Examples

This command sets up an interface as a potential master.

switch(config-if)# ptp unicast-negotiation remote-grantee 10.0.0.1/24
switch(config-if)# ptp unicast-negotiation remote-grantee 10.0.0.1/24 profile fastProfile

This command sets up an interface as a potential slave.

switch(config-if)# ptp unicast-negotiation candidate-grantor 10.0.0.1
switch(config-if)# ptp unicast-negotiation candidate-grantor 10.0.0.1 profile fastProfile

show ptp

The show ptp command displays summary Precision Time Protocol (PTP) information and PTP status of switch ports.

Command Mode

EXEC

Command Syntax

show ptp

Example

This command displays summary PTP information.

switch#show ptp
PTP Mode: gptp - Generalized PTP Clock
Clock Identity: 2001:0DB8:73:ff:ff:26:fd:90
Grandmaster Clock Identity: 2001:0DB8:96:ff:fe:6c:ed:02
Number of slave ports: 1
Number of master ports: 6
Slave port: Ethernet33
Mean Path Delay (nanoseconds): 718
Steps Removed: 1
Neighbor Rate Ratio: 1.00000007883
Rate Ratio: 1.00000007883
Interface StateASTime Since LastNeighborMean PathResidence 
Capable   Changed  Rate    Ratio              Delay (ns)  Time (ms) 
--------- -------- ------- ------------------ ----------- -----------  
Et1       Disabled No      Never              1.0          00
Et2       Disabled No      Never              1.0          00
Et3       Disabled No      Never              1.0          00
Et4       Disabled No      Never              1.0          00
Et5       Disabled No      Never              1.0          00
Et6       Disabled No      Never              1.0          00
Et7       Master           Yes                0:21:08      1.000000094200

show ptp foreign-master-record

The show ptp foreign-master-record command displays information about foreign masters (PTP sources not designated as the switch's master from which the switch has received sync packets).

Command Mode

EXEC

Command Syntax

show ptp foreign-master-record

Example

This command displays information about PTP foreign masters.

switch# show ptp foreign-master-record
No Foreign Master Records
switch#

show ptp interface counters

The show ptp interface counters command displays PTP interface counters for all interfaces.

Command Mode

EXEC

Command Syntax

show ptp [interface_name] counters

Parameters

interface_name> Interface type and numbers. Options include:

no parameter Display information for all interfaces.
ethernet e_range Ethernet interface range specified by e_range.
loopback l_range Loopback interface specified by l_range
management m_range Management interface range specified by m_range.
port-channel p_range Port-Channel Interface range specified by p_range.
vlan v_range VLAN interface range specified by v_range.
VXLAN vx_range VXLAN interface range specified by vx_range.

Valid range formats include number, number range, or comma-delimited list of numbers and ranges.

Example

This command displays the PTP interface counters.

switch# show ptp interface ethernet 5 counters
Interface Ethernet5
Announce messages sent: 0
Announce messages received: 0
Sync messages sent: 0
Sync messages received: 0
Follow up messages sent: 0
Follow up messages received: 0
Delay request messages sent: 0
Delay request messages received: 0
Delay response messages sent: 0
Delay response messages received: 0
Peer delay request messages sent: 0
Peer delay request messages received: 0
Peer delay response messages sent: 0
Peer delay response messages received: 0
Peer delay response follow up messages sent: 0
Peer delay response follow up messages received: 0
switch#

show ptp interface

The show ptp interface command displays PTP information for all the interfaces on the device.

Command Mode

EXEC

Command Syntax

show ptp [interface_name][status_filter]

Parameters

interface_name- Interface type and numbers. Options include:
- no parameter - Display information for all interfaces.
- ethernet e_range - Ethernet interface range specified by e_range.
- loopback l_range - Loopback interface specified by l_range.
- management m_range - Management interface range specified by m_range.
- port-channel p_range - Port-Channel Interface range specified by p_range.
- vlan v_range - VLAN interface range specified by v_range.
Valid range formats include number, number range, or comma-delimited list of numbers and ranges.
status_filter Filters interfaces by configuration status. Options include:
- no parameter all interfaces.
- enabled PTP configured interfaces.

Example

This command displays PTP information for all the interfaces on the device.

switch# show ptp interface
Interface Ethernet1
PTP: Disabled
Port state: Disabled
Sync interval: 1.0 seconds
Announce interval: 2.0 seconds
Announce interval timeout multiplier: 3
Delay mechanism: end to end
Delay request message interval: 32.0 seconds
Transport mode: ipv4

Interface Ethernet5
PTP: Disabled
Port state: Disabled
Sync interval: 8.0 seconds
Announce interval: 2.0 seconds
Announce interval timeout multiplier: 5
Delay mechanism: peer to peer
Peer delay request message interval: 8.0 seconds
Peer Mean Path Delay: 0
Transport mode: ipv6

switch#

show ptp local-clock

The show ptp local-clock command displays the Precision Time Protocol (PTP) clock information.

Command Mode

EXEC

Command Syntax

show ptp local-clock

Example

This command shows how to display the PTP local clock and offset.

switch# show ptp local-clock
PTP Mode: Boundary Clock
Clock Identity: 0x00:1c:73:ff:ff:1e:83:24
Clock Domain: 1
Number of PTP ports: 24
Priority1: 128
Priority2: 128
Clock Quality:
   Class: 248
   Accuracy: 0x30
   OffsetScaledLogVariance: 0xffff
Offset From Master: 0
Mean Path Delay: 0
Steps Removed: 0
switch#

show ptp masters

The show ptp masters command displays information about the switch's PTP master and grand master clocks.

Command Mode

Privileged EXEC

Command Syntax

show ptp masters

Example

This command displays information about the switchs PTP master and grand master clocks.

switch# show ptp masters
Parent Clock:
Parent Clock Identity: 0x00:1c:73:ff:ff:00:72:40
Parent Port Number: 0
Parent IP Address: N/A
Observed Parent Offset (log variance): N/A
Observed Parent Clock Phase Change Rate: N/A

Grandmaster Clock:
Grandmaster Clock Identity: 0x00:1c:73:ff:ff:00:72:40
Grandmaster Clock Quality:
   Class: 248
   Accuracy: 0x30
   OffsetScaledLogVariance: 0xffff
   Priority1: 128
   Priority2: 128
switch#

show ptp monitor

The show ptp monitor command to displays the list of up to 100 recorded entries of offset from master, mean path delay and skew values, along with current PTP mode, whether or not the feature is enabled, number of entries displayed and the configured thresholds for each metric. Entries are sorted by the system time at which the value was calculated, starting with the most recent data at the top.

Command Mode

EXEC

Command Syntax

show ptp monitor

Example

This command displays the information recorded by PTP monitoring.

switch# show ptp monitor 
PTP Mode: Boundary Clock 
Ptp monitoring: enabled 
Number of entries: 5 
Offset from master threshold: 1500 
Mean path delay threshold: not configured 
Skew threshold: 0.5 
Interface  Time                          Offset from   Mean Path     Skew         
                                         Master (ns)   Delay (ns) 
---------- ----------------------------- ------------  ------------- ----------- 
Et8        21:23:12.901 UTC Feb 22 2018  71            5849           1.003159918 
Et1        21:23:12.901 UTC Feb 22 2018  113           3672           1.004990621 
Et2        21:23:12.901 UTC Feb 22 2018  706           7799           1.002744199 
Et1        21:23:12.901 UTC Feb 22 2018  803           5861           1.003432049 
Et1        21:23:12.901 UTC Feb 22 2018  610           3415           0.998974658

show ptp source ip

The show ptp source ip command displays the PTP source IP for the device.

Command Mode

Privileged EXEC

Command Syntax

show ptp source ip

Example

This command shows the PTP source IP to be 10.0.2.1

switch# show ptp source ip
PTP source IP: 10.0.2.1

This command shows the PTP source IP to be 2001:db8:ac10:fe01::.

switch# show ptp source ip
PTP source IP: 2001:db8:ac10:fe01::

show ptp unicast-negotiation

The show ptp unicast-negotiation command displays PTP unicast negotiation information for the switch.

Command Mode

EXEC

Command Syntax

show ptp unicast-negotiation profile

show ptp unicast-negotiation [DETAILS]

Parameters

DETAILS Details requested. Options include:

candidate-grantor Display all configured candidate grantors, associated profile name and latest update.
remote-grantee Display all configured remote grantees, associated profile name and latest update.
granted Display to which remote grantees each port has granted and some detail.
requested Display to which candidate grantors each port has requested and some detail.

Examples

This command displays the unicast negotiation profiles configured on the switch.

switch# show ptp unicast-negotiation profile
Unicast Negotiation Profile fastProfile
Announce interval: 0.25 seconds
Announce duration: 500 seconds
Sync interval: 0.125 seconds
Sync duration: 300 seconds
Delay Response interval: 0.125 seconds
Delay Response duration: 300 seconds

This command displays all configured candidate grantors, associated profile name and latest update.

switch# show ptp unicast-negotiation candidate-grantor
 Interface  Address    Profile        Grantor Status
----------- ---------- -------------- ------------------ 
 Ethernet1  4::1       fastProfile    Master
 Ethernet1  4::2       fastProfile    Candidate Master
 Ethernet2  4::2       fastProfile    Blacklisted

This command displays all configured remote grantees, associated profile name and latest update.

switch# show ptp unicast-negotiation remote-grantee
 Interface    Address    Profile
------------ ---------- -------------
 Ethernet1    4::1/96    fastProfile
 Ethernet1    4::2/96    fastProfile
 Ethernet2    4::2/96    fastProfile

This command displays to which remote grantees each port has granted and some detail.

switch# show ptp unicast-negotiation granted 
Interface    Address    Message     Interval       Duration       Expires In
----------- ---------- ------------ -------------- -------------- -----------
 Ethernet2   4::1       Announce    0.25 seconds   300 seconds    30 seconds
 Ethernet2   4::1       Sync        2.0 seconds    300 seconds    30 seconds

This command displays to which candidate grantors each port has requested and some detail.

switch# show ptp unicast-negotiation requested  
Interface    Address   Message     Interval        Duration       Expires In
------------ --------- ----------- --------------- -------------- ------------
 Ethernet2   4::2      Announce    0.25 seconds    600 seconds    250 seconds
 Ethernet2   4::2      Sync        2.0 seconds     300 seconds    denied

show ptp unicast-negotiation profile

The show ptp unicast-negotiation profile command displays all user configured profiles and their values.

Command Mode

EXEC

Command Syntax

show ptp unicast-negotiation profile

Example

This command displays the PTP profiles.

switch# show ptp unicast-negotiation profile
Unicast Negotiation Profile fastProfile
Announce interval: 0.25 seconds
Announce duration: 500 seconds
Sync interval: 0.125 seconds
Sync duration: 300 seconds
Delay Response interval: 0.125 seconds
Delay Response duration: 300 seconds

Switch Environment Control

The following sections describe the commands that display temperature, fan, and power supply status:

The switch chassis, fans, power supplies, line cards, and supervisors also provide LEDs that signal status and conditions that require attention. The Quick Start Guide for the individual switches provides information about their LEDs.

Environment Control Introduction

Arista switching platforms are designed to work reliably in common data center environments.

To ensure their reliable operation and to monitor or diagnose the switch's health, Arista provides a set of monitoring capabilities available through the CLI or SNMP entity MIBs to monitor and diagnose potential problems with the switching platform.

Managing Display Attributes

Display commands control the content of the banner and the command line prompt.

Banners

The switch can display two banners:

Login banner - The login banner precedes the login prompt. Use a login banner to warn against unauthorized network access attempts or other messages to users.
motd banner - After the user logs into the switch, the Message of the Day (MoTD) banner displays.

This output displays both banners in bold:

This is a login banner
switch login: john
Password:
Last login: Mon Jan 14 09:24:36 2013 from aristanetworks.com
This is an motd banner
switch>

Use the following commands to create a login and motd banner:

switch(config)# banner login
Enter TEXT message. Type 'EOF' on its line to end.
This is a login banner
EOF
switch(config)# banner motd
Enter TEXT message. Type 'EOF' on its own line to end.
This is an motd banner
EOF
switch(config)#

Use the following steps to create a banner:

Enter global configuration mode.
```
switch# config
switch(config)# 
```
Enter Banner Configuration Mode by typing the desired command:
- To create a login banner, type banner login.
- To create a motd banner, type banner motd
  The switch responds with instructions about entering the banner text.
```
switch(config)# banner login 
Enter TEXT message. Type 'EOF' on its own line to end. 
```
Enter the banner text.
This is the first line of banner text.

This is the second line of banner text.
Press Enter to place the cursor on a blank line after completing the banner text.
Exit banner edit mode by typing EOF.
```
EOF 
switch(config)# 
```

Configuring the CLI Prompt

The CLI prompt provides an entry point for EOS commands. The prompt command configures the contents of the prompt. The no prompt command returns the prompt to the default of %H%P.

Characters allowed in the prompt include A-Z, a-z, 0-9, and the following additional characters:

! @ # $ % Âˆ & * ( ) - = + f g [ ] ; : < > , . ? / Â˜ n

The prompt supports these control sequences:

%s “ - Space character
%t “ - Tab character
%% “ - Percent character
%H “ - Host Name
%D “ - Time and Date
%D{f_char} “ - time and date, format specified by the BSD strftime (f_char) time conversion function.
%h “ - Host name up to the first.
%P “ - Extended command mode
%p “ - Command mode
%r “ - Redundancy status on modular systems (has no effect on a fixed system)
%R “ - Extended redundancy status on modular systems â€“ includes status and slot number (has no effect on a fixed system)

Examples

Use the following command to create a prompt that displays system 1 and the Command Mode.
```
switch(config)# prompt system%s1%P
system 1(config)#
```
Use the following command to create a prompt that displays the Command Mode.
```
switch(config)# prompt %p
(config)#
```

These equivalent commands create the Default prompt.

% prompt %H%P
host-name.dut103(config)#

%no prompt
host-name.dut103(config)#

System Event Logging

Arista switches log Event Notifications using the Syslog protocol. By default, EOS logs the event notifications internally to the folder, /var/log/messages but can also display them on the console or log them to an external server. Configure severity levels and log message destinations using the CLI, and configure individual processes and protocols to adjust or limit the messages from them. Use the show logging command to obtain visibility into the buffered and persistent logs which contain critical system, process, and operational messages.

For a full list of Syslog messages, visit Arista Support. Once on the site, click Software Downloads, and then navigate to EOS > Active Releases > latest_release.

Click on the latest released version, and select Docs. Once expanded, select the latest_release-SysMsgGuide.pdf. The SysMsgGuide contains the latest version of the Syslog Messages in EOS.

System Event Logging Guidelines

Consider the following guidelines when configuring system logging on the switch:

Buffer Size - Configure the number of messages stored in the buffer using the logging buffered size command. By default, EOS retains a large, but volatile, buffer and discards messages upon reboot unless you configure persistent logging.
Severity - When you specify a severity level, EOS only processes messages with that severity and higher. When filtering with a severity level, EOS only displays messages with that severity and lower.
Real-time Output - To view messages as they occur during your terminal session, enable terminal monitoring with the command, terminal monitor.
Custom Prefixes - Configure custom prefixes for system log messages.

Severity Thresholds

Specifying a severity sets the minimum threshold of messages logged using an integer from 0 to 7, or a string from the following list:

0 - Emergency: System unusable
1 - Alert: Take immediate action
2 - Critical: Critical conditions
3 - Error: Error conditions
4 - Warning: Warning conditions
5 - Notice: Normal but significant conditions
6 - Informational: Informational messages
7 - Debug: Debug level messages

For example, if you configure a logging level of 6, EOS logs everything with levels 0-6.

Logging Locations

EOS logs system events in several locations depending on the nature of the log event. Logging occurs in the following locations and includes different types of events:

Buffer Logging
Console Logging
Persistent Logging
Monitor logging
Synchronous Logging
Trap Logging

Buffer Logging

Use logging buffered to retain logs in the buffer space on the switch. Set the syslog level as well as the buffer size. Arista Networks recommends a larger buffer size to retain messages for a week or longer.

Console Logging

Displays system notifications directly on the switch console or terminal session to provide real-time visibility into the health and operational status of the switch as events occur.

Persistent Logging

Enable persistent logging to write system logs to non-volatile flash and retain them after a switch reloads. However, utilizing persistent logging may fill up the flash when lots of log events occur on the switch.

To enable persistent logging with a maximum buffer size of 10,000 bytes, use the following command:

switch(config)# logging persistent 10000

Synchronous Logging

Synchronous logging ensures logging messages appear on the console but do not interrupt CLI output from command output. The log messages display after the CLI completes the command output.

The logging synchronous has the following format:

switch(config)# logging synchronous [ level severity | all]

level severity specify log messages of a lower severity level to log synchronously and specifies all log messages to log synchronously

Trap Logging

Enable trap logging to send log messages to a remote server. Specifying a severity level logs only log messages with a severity at or above that level to the remote server. To add a remote server IPv4 address, 192.168.96.147, use the following commands:

switch(config)# logging host 192.168.96.147
switch(config)#

To add a fully qualified domain name (FQDN), mycompany.com, as the remote server, use the following command:

switch(config)# logging host mycompany.com

Use the following command to enable trap logging with severity 6:

switch(config)# logging trap system 4

The logging trap system command has the following parameters:

contain - Specify text contained in a log message.
facility - Specify one of 23 facilities, such as 1, for user-level messages.
severity - Specify a severity from 0 (emergencies) to 7 (debugging).
tag - Specify a tag that correlates with a program name.

Enabling System Logging

Use the following command to enable system logging on the switch:

switch(config)# logging on
switch(config)#

The no | defaultversion of the command disables system logging on the switch and removes the configuration from the running-config.

Configuring the Source Interface

After enabling a remote server to receive log messages, specify a local interface to derive the source IP address using the following syntax:

logging vrf vrf_name local-interface interface

Configuring Custom Prefixes for System Log Messages

Add custom prefixes to system log messages to create a format for syslog messages sent to syslog servers. The custom prefix can consist of any combination of underscores, numbers and upper and lower case letters, but does not allow other characters including whitespace.

Note: You cannot configure the parameters, hostname and prefix, at the same time. Configuring one automatically disables the other command.

Use the following command to add the prefix, router_1a, to syslog messages:

switch(config)# logging format prefix router_1a
switch(config)#

Configuring Active Standby Syslog Servers

EOS supports a standby server in addition to the existing logging mechanism for UDP syslog servers. Specify a logging group and then add remote syslog servers. The first configured syslog server becomes the active server and receives forwarded syslog messages when reachable through ICMP. The second configured host server becomes the backup server and receives syslog messages when the active syslog server becomes unreachable on the network.

The syslog server works with Connectivity Monitor to determine server liveliness by periodically sending ICMP probes at a configurable interval. Syslog servers configured in the active-standby mode start the Connectivity Monitor agent to probe the configured servers, and allows the syslog servers to work with the connectionless UCP protocol.

Configure syslog servers and related options in the Logging Group Configuration mode. Use the following commands to configure the logging group, Group_1 on vrf bluengreen, and host 172.16.21.23, with port 80:

switch(config)# logging group server Group_1
switch(config-logging-group-Group_1)# logging vrf bluengreen host 172.16.21.23 port 80
switch(config-logging-group-Group_1)#

Configure the second syslog server, 192.168.1.3:

switch(config-logging-group-Group_1)# host 192.168.1.3
switch(config-logging-group-Group_1)#

The host, 172.16.21.23, becomes the active server, and the host, 192.168.1.3, becomes the standby server on port 514, the default port.

Configure a local interface, if not already configured on the VRF, to derive the source IP address of ICMP probes and syslog messages. Any host configured on the VRF then use the interface, Ethernet1. Use the following commands to configure an interface, Ethernet1:

switch(config)# logging vrf bluengreen local-interface Ethernet1
switch(config)#

Configuring ICMP Probes

An ICMP probe determines the syslog server status and by default, sends one every 5 seconds. The probe consists of 5 ICMP echo packets, and if all of the packets fail, the syslog server has a down status. Use the following commands to configure sending an ICMP probe every 10 seconds:

switch(config-logging-group-Group_1)# probe interval 10
switch(config-logging-group-Group_1)#

The interval can be configured from 1 to 600 seconds.

Configuring Success Thresholds

When a syslog server becomes unavailable, sending a number of sequentially passing probes determines the health of the server. If configured to 5, then 5 successful probes must be received before returning the status to available. This becomes useful when the server has a high variability of liveliness and helps prevent erroneous state changes and syslogs. The threshold has a default value of 0 which means that a syslog server has a status of available as long as it receives one probe successfully.

Use the following commands to configure a success threshold of 5:

switch(config-logging-group-Group_1)# probe threshold success 5
switch(config-logging-group-Group_1)

Displaying Syslog Server Status

The show logging group server command displays the status of the syslog servers. It also indicates the primary and standby servers and the recipient of the syslog messages.

switch# show logging group server Group_1
switch(config)#show logging group server
Logging group group1
Logging to 172.16.21.23 port 80 vrf bluengreen via udp (primary), state: probing
Last available: n/a
Logging to 192.168.1.3 vrf default via udp (standby), state: active
Last available: 0:00:10 ago

The output displays the primary status as probing because the syslog server has no availability, and the standby server as active with the endpoint status of 10 seconds indicating the last time the server received syslog messages.

Displaying System Logging Information

To display information about the system logging configuration, use the show logging command:

switch# show logging
Syslog logging: enabled
Buffer logging: level notifications
Console logging: level debugging
Persistent logging: level debugging
Monitor logging: level debugging
Synchronous logging: disabled
Trap logging: level informational
    Logging to '192.168.93.147' port 6514 in VRF default via udp
    Logging to '192.168.96.147' port 514 in VRF default via udp
    Logging to '192.168.96.147' port 6514 in VRF default via udp
    Logging to '192.168.96.147' port 514 in VRF purple via udp
Sequence numbers: disabled
Syslog facility: local4
Hostname format: Hostname only
Repeat logging interval: disabled
Repeat messages: disabled
Root login logging: disabled

External configuration:
    active: 
    inactive: 

Facility                   Severity            Effective Severity
--------------------       -------------       ------------------
aaa                        debugging           debugging    
accounting                 debugging           debugging    
acl                        debugging           debugging    
agent                      debugging           debugging    
ale                        debugging           debugging    
arp                        debugging           debugging    
bfd                        debugging           debugging    
bgp                        debugging           debugging
<------>
vrf                        debugging           debugging    
vrrp                       debugging           debugging    
vxlan                      debugging           debugging    
ztp                        debugging           debugging

The output displays the level of logging for each type of logging location and the configuration on the switch. Each feature displays the severity and effective severity of the log messages.

Managing TCAM Capacity Warnings

Strata chipsets, present in the 7010, 7050X, 7060X, 7250X, 7260X, and 7300X series switches, provide event logging for the hardware capacity of TCAM tables on a per-slice basis, and trigger a capacity warning by default whenever any TCAM slice exceeds 90% capacity. As a result, default TCAM logging can generate high levels of syslog messages on these platforms. The hardware capacity alert table command can adjust the capacity levels for the warnings above the 90% default. In that case, this adjustment can be made per TCAM resource and per slice. The command can also disable TCAM hardware capacity messages at the level Warning and below for a given slice. To disable messages, set the threshold to 0 or use the no version of the command.

Examples

This command reduces hardware capacity Syslog warnings by increasing the capacity threshold to 99% for EFP table monitoring in slice 2.
```
switch(config)# hardware capacity alert table EFP feature Slice-2 threshold 99
```
This command reduces messages by disabling hardware capacity Syslog warnings entirely for the IFP table in slice 5.
```
switch(config)# hardware capacity alert table IFP feature Slice-5 threshold 0
```
This command reduces messages by disabling hardware capacity Syslog warnings entirely for the VFP table in all slices.
```
switch(config)# no hardware capacity alert table VFP
```

Note:

Hardware capacity messages are user-configurable only at or below the “Warning” level. When depleting TCAM management software, it always sends “Error” messages to Syslog and affected features when all TCAM resources are used.

Layer 2 MAC Learn Failure Detection

A hash collision occurs when two or more distinct pieces of data map to the same entry or slot in the hardware table. It can happen when the hash function used to calculate the index for a MAC address results in the already occupied index and causes a failure of inserting the later MAC address to the hardware table.

Configuring Layer 2 MAC Learn Failure Detection

Use the following commands to enable system logging of MAC Learn Failures on the switch:

switch(config)# platform trident hardware mac-address-table collision-tracking

Use the no version of the command to disable the feature:

switch(config)# no platform trident hardware mac-address-table collision-tracking

Displaying Layer MAC Learn Failure Information

Use the following command to display missing MAC addresses in the hardware table:

switch# show platform trident l2 hardware mac-address-table missing
   Vlan  |   Mac Address         |   Present in SW?   |   Present in HW   | Missing in HW |
---------|-----------------------|--------------------|-------------------|---------------|
   2141  |   00:00:04:00:00:09   |         Y          |                   | Switchcard1/0 |
---------|-----------------------|--------------------|-------------------|---------------|
   2141  |   00:00:03:00:19:0c   |         Y          |                   | Switchcard1/0 |
---------|-----------------------|--------------------|-------------------|---------------|
                
Total entries missing in software:  0                                                    
                
Total entries missing in hardware:  2                                                    
Switchcard1/0:  2

Sample Syslog Message for L2 MAC Learn Failure

%ETH---MACADDRBANKFULL: Unable to program learned dynamic host table entry for MAC address MAC address in VLAN VLAN Id due to hardware resource exhaustion.

Timing Protocols

The Precision Time Protocol (PTP) provides clock accuracy for networked devices, allowing clocks to be synchronized locally in increments of less than a microsecond. PTP uses a primary-secondary hierarchy similar to that used by NTP. The primary clock provides the most precise time, and the secondary devices use the signal to synchronize their clocks.

The master clock sends a sync request, called an announce message by the IEEE 1588-2008 standard, at a regular interval. The slave clock responds with a time-stamped delay request message in order to measure and compensate for packet delays between the devices. The slave then receives a message from the master specifying the time of the delay message and allows the slave to calculate final values for clock synchronization. The time maintains synchronization by regularly exchanging PTP packets between master and slave.

Note: Arista switches do not support setting the system clock using PTP. Use the NTP service on the PTP grandmaster for system clock synchronization.

EOS disables PTP globally by default. Enabling PTP on an interface requires the following steps:

Optional PTP global configurations include the following:

Optional PTP interface-level configurations include the following:

Page 13 of 17

End of Support

Setting the Interval for Sending Synchronization Messages

Setting the PTP Transport Type

Setting the Local Priority of the Clock and Interfaces

Setting up as a Slave to another PTP Device

Setting up as a Master to another PTP Device

Setting the masterOnly Flag

Configuring the Unicast Profile

Displaying Unicast Negotiation Configurations

Configuring a PTP Grandmaster Clocks List

Displaying Grandmaster List Information

Viewing PTP Settings and Status

Displaying General PTP Information

Displaying PTP Clock Properties

Displaying PTP Foreign Master

Displaying PTP Information for all Interfaces

Displaying PTP Interface Counters

Displaying PTP Local Clock and Offset

Displaying PTP Masters Information

Displaying PTP Monitoring Information

Displaying PTP Source IP

Precision Time Protocol (PTP) Commands

ptp announce interval

ptp announce timeout

ptp delay-mechanism

ptp delay-req interval

ptp domain

ptp enable

ptp forward-v1

ptp grandmasters

ptp hold-ptp-time

ptp local-priority

ptp mode

ptp monitor threshold mean-path-delay

ptp monitor threshold offset-from-master

ptp monitor threshold skew

ptp monitor

ptp pdelay-neighbor-threshold

ptp pdelay-req interval

ptp priority1

ptp priority2

ptp role

ptp source

ptp sync timeout

ptp sync-message interval

ptp transport

ptp ttl

ptp unicast-negotiation

show ptp

show ptp foreign-master-record

show ptp interface counters

show ptp interface

show ptp local-clock

show ptp masters

show ptp monitor

show ptp source ip

show ptp unicast-negotiation

show ptp unicast-negotiation profile

Switch Environment Control

Environment Control Introduction

Managing Display Attributes

Banners

Configuring the CLI Prompt

Examples

System Event Logging

System Event Logging Guidelines

Severity Thresholds

Logging Locations

Enabling System Logging

Configuring the Source Interface

Configuring Custom Prefixes for System Log Messages

Configuring Active Standby Syslog Servers

Displaying Syslog Server Status

Displaying System Logging Information

Managing TCAM Capacity Warnings

Examples

Layer 2 MAC Learn Failure Detection

Configuring Layer 2 MAC Learn Failure Detection

Displaying Layer MAC Learn Failure Information

Sample Syslog Message for L2 MAC Learn Failure