To set the priority 1 value, use the ptp priority1 command. Lower values take precedence.
switch(config)# ptp priority1 120
switch(config)#To set the priority 2 value for the clock, use the ptp priority2 command.
This command configures the priority 2 value of 128.
switch(config)# ptp priority2 128
switch(config)#To set the source IP address for all PTP packets, use the ptp source command.
Example
10.0.2.1 for all PTP
packets.switch(config)# ptp source ip 10.0.2.1
switch(config)#2001:db8:ac10:fe01:: for
all PTP
packets.switch(config)# ptp source ip 2001:db8:ac10:fe01::
switch(config)#To set the Time To Live (TTL) of PTP packets, use the ptp ttl command. TTL is the maximum number of hops that a PTP packet may make.
Example
switch(config)# ptp ttl 64
switch(config)#PTP Monitoring records PTP information, including the offset from the master, mean path delay, and skew values, which you view using a show command. PTP Syslog messages generate the metrics with threshold values configured on the switch when enabled. EOS enables PTP Monitoring by default.
Use the ptp monitor command to enable PTP monitoring on the device. The no form of the command disables PTP monitoring and clears all of the recorded PTP data.
Example
switch(config)# no ptp monitorThe offset is the difference in nanoseconds between master and slave time. Use the ptp monitor threshold offset-from-master command to specify the offset-from-master threshold in nanoseconds. EOS generates a Syslog message if the most recently calculated time offset from the PTP master occurs outside the configured range. The maximum offset threshold is one second. The no form of the command clears the threshold value and prevents further Syslog messages from generating for this parameter.
Example
switch(config)# ptp monitor threshold offset-from-master 500 Mean path delay is the mean time in nanoseconds PTP packets take to travel between master and slave. Use the ptp monitor threshold mean-path-delay command to specify the mean-path-delay threshold in nanoseconds. EOS generates a Syslog message if the value of the most recently calculated mean path delay becomes greater than or equal to this threshold. The maximum mean-path-delay threshold is one second. The no form of the command clears the threshold value and prevents further Syslog messages from generating for this parameter.
Example
switch(config)# ptp monitor threshold mean-path-delay 2000PTP skew is the clock frequency difference between master and slave. Use the ptp monitor threshold skew command to configure the value of the skew-threshold percentage. A Syslog message generates if the value of the most recently calculated skew does not fall within the range (1/(1+<threshold>), 1*(1+<threshold>)). Skew threshold percentage represents a double precision (16 digit) real number ranging from 0 (0%) to 10 (1000%). The no form of the command clears the threshold value and prevents further Syslog messages from generating for this parameter.
Example
switch(config)# ptp monitor threshold skew 5To set the interval at which an interface sends PTP announce messages, use the ptp announce interval command. EOS measures the interval in log seconds. This value also affects the timeout interval.
switch(config)# interface ethernet 5
switch(config-if-Et5)# ptp announce interval 2
switch(config-if-Et5)#To set the timeout multiplier for an interface, use the ptp announce timeout command. The timeout multiplier is the number of announcement intervals that the interface waits without receiving a PTP announcement before a timeout occurs.The values range from 2 to 255. The default multiplier is 3, which results in a 6-second timeout interval when setting the announcement interval to the default of 2 seconds.
switch(config-if-Et5)# ptp announce timeout 5
switch(config-if-Et5)#To set the minimum interval between the PTP peer delay-request messages, use the ptp pdelay-req interval command.
Example
switch(config-if-Et5)# ptp pdelay-request interval 3
switch(config-if-Et5)#To set the delay threshold for which the peer cannot run generalized Precision Time Protocol (gPTP), use the ptp pdelay-neighbor-threshold command.
Example
switch(config-if-Et5)# ptp pdelay-neighbor-threshold 200000
switch(config-if-Et5)#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
switch(config-if-Et5)# ptp sync-message interval 3
switch(config-if-Et5)#switch(config-if-Et5)# ptp transport ipv4
switch(config-if-Et5)#switch(config-if)# ptp transport ipv6
switch(config-if)#switch(config)# ptp local-priority 1
switch(config-if)# ptp local-priority 255Each 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.
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 fastProfileEach 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.
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 fastProfileswitch(config-if)# ptp role masterA 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.
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(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)# 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(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(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(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(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 2018The show ptp interface command displays the interface local priority in G8275.2 mode.
(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