Regulatory Model Numbers

This section lists the Regulatory Model Numbers (RMNs), where applicable, for the product models for the switches described in this document.

 

Note: For modular switches, the RMN applies to allowable configurations for switches in the switch family referenced by the Product Number(s).

 

Table 1. Regulatory Model Numbers and Product Numbers
Regulatory Model Number (RMN) Product Number(s)
AN1722 DCS-7358X4, DCS-7368X4, DCS-7289R3A

 

Maintenance and Field Replacement

This section discusses the following topics:
Note: Follow ESD protection protocols while handling switch components during maintenance operations.

 

Switchcard Module

The switchcard module is accessible from the rear of the switch, as shown in Rear Panels. Refer to the following figure for more details on removing and replacing the switchcard module.

 

Figure 1. Switchcard Module Maintenance
1 Switchcard Release Handle 2 Switchcard Release Lever

 

The module includes lock levers that secure it to the chassis. The module and the lock levers are easily damaged by improperly removing, inserting, or handling. Use caution while lifting or moving the module after removing it from the chassis.

Removing the Switchcard Module

Follow the steps below to remove the switchcard module from the chassis.
  1. Ground yourself with an ESD wrist strap.
  2. Move the release handle down.
  3. Pinch the release levers towards the center to unlock the module from the chassis.
  4. Carefully remove the switchcard module from the chassis while supporting it.

Inserting the Switchcard Module

The module insertion process is the inverse of the removal procedure. Follow the steps listed below to insert the switchcard module into a chassis.
  1. Align the switchcard module with the rails in the chassis for insertion.
  2. Slide the module gently into the chassis until you feel a little resistance. The switchcard module will extend outside the chassis.
  3. Pinch the release levers towards the center and push the module until it is flush with the chassis. Let go of the release levers.
  4. Try moving the module out gently without engaging the release levers. The module will not move if it is seated correctly.
  5. Return the release handle to its locked position (up).

     

    Note: Descriptions for removing and replacing power supplies and fans are for a representative power supply or fan. Locations of status indicator LEDs may differ. Refer to your device's front and rear panel illustrations to locate the appropriate LED.

     

Power Supplies

The power supplies are accessible from the rear of the switch, as shown in Rear Panels. Refer to Removing a Power Supply for more details on removing and replacing a power supply unit.

The following steps are required when removing power supplies from a switch.

Removing a Power Supply

  1. Ground yourself with an ESD wrist strap.
  2. Power down the power supply, which will be removed by disconnecting the AC power cable.
  3. Push the power supply release handle and remove the power supply, as shown in the following figure.

     

    Figure 2. Power Supply Removal


    1 PSU Release Handle

     

Installing a Power Supply

You must make space for installing the power supply by removing an existing one (Removing a Power Supply).
  1. Remove the replacement power supply from its packaging.
  2. Slide the new power supply into the empty slot.
  3. Slide the new power supply into the switch until the power supply is fully seated, and the release handle snaps into place.
  4. Connect the power cord to the power supply.
  5. Verify the LED(s) on the power supply.

     

    Note: The Power Supply status LED should be a steady green for normal operation.

     

  6. Verify the new power supply operation by issuing the show environment power command. 
    switch# show environment power

     

    The command output will list the power supplies in operation and should include the one you replaced.

Fan Modules

The fan modules are accessible from the rear of the switch, as shown in Rear Panels.

Removing a Fan Module

The following steps are required when removing or replacing fans from a switch.
  1. Ground yourself with an ESD wrist strap.
  2. Push the fan module release lever and slide the fan module out of the switch, as shown in the following figure.

     

    Figure 3. Fan Module Removal

    1 Fan Module Release Lever

     

Installing a Fan Module

You must make space for installing the fan module by removing an existing one (Removing a Fan Module).
  1. Remove the replacement fan from its packaging.
  2. Slide the new fan module into the switch until the module is fully seated, and the release lever snaps into place.

    The fan installation indicator will be green installed and seated correctly.

  3. Verify that the fan module is working normally.

     

    Note: The fan module status LED should be a steady green for normal operation.

     

Supervisor Module

The supervisor module is accessible from the front of the switch, as shown in Front Panels. Refer to the following figure for more details on removing and replacing a supervisor module.

 

Note: Supervisors are hot-swappable. The switch will reboot when the replacement supervisor powers up.

 

 

Figure 4. Supervisor Module Maintenance

 

Removing a Supervisor Module

Perform the following steps to remove the module.
  1. Put on a grounded ESD strap.
  2. Lift the supervisor module ejector latch and move the latch down to release the supervisor module.
  3. Gently remove the supervisor module by pulling it outwards.

Installing a Supervisor Module

You must make space for installing the module by removing an existing one (Removing Supervisor Module). Perform the following steps to install the module.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the supervisor module to be installed.
  3. Slide the supervisor module into the slot.
  4. Raise the ejector handle and latch it into place.
  5. Verify that the module is operating normally.

Linecards

The linecards are accessible from the front of the switch, as shown on Front Panels. The linecards are hot-swappable. It would help to consider that the linecard you are inserting is compatible with the switch and the linecard you are replacing. Refer to the following figure for more details on removing and replacing a linecard module.

 

Figure 5. Linecard Module Maintenance

 

Removing a Linecard

Perform the following steps to remove a linecard.
  1. Put on a grounded, anti-static ESD strap.
  2. Use the ejector handle or lever in the middle of the linecard to release it from the chassis.
  3. Slide the linecard gently out of the slot.

Installing a Linecard

You must make space for installing the linecard by removing an existing one (Removing Linecard) from a linecard slot available on the switch.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the linecard to be installed.
  3. Slide the linecard gently into the slot.
  4. Use the ejector handle of the linecard to seat the linecard into the chassis.
  5. Verify that the linecard is operating normally (Table 2).

Linecards

This section displays the Linecards supported by modular switches this guide covers.

 

DCS-7368-4D



1 Port numbers
2 Linecard Status LED
3 Linecard Ejector Latch
4 Port Status LED

 

DCS-7368-4P



1 Port numbers
2 Linecard Status LED
3 Linecard Ejector Latch
4 Port Status LED

 

DCS-7358-16C and DCS-7368-16C



1 Port numbers
2 Linecard Status LED
3 Linecard Ejector Latch
4 Port Status LED

 

DCS-7368-16S

 



1 Port numbers
2 Linecard Status LED
3 Linecard Ejector Latch
4 Port Status LED

 

Rear Panels

This section displays the rear panel of all switches this guide covers.

Rear Panel with Two PSUs



1 Switch Card Module Release Handle 6 PSU Status LED
2 Fan 7 PSU
3 Fan Module Release Lever 8 PSU Release Handle
4 Fan Installation Indicator 9 Ground
5 Fan Status LED 10 ESD

 

Rear Panel with Four PSUs


1 Switch Card Module Release Handle 6 PSU Status LED
2 Fan 7 PSU
3 Fan Module Release Lever 8 PSU Release Handle
4 Fan Installation Indicator 9 Ground
5 Fan Status LED 10 ESD

 

Front Panels

This section displays the front panel of all switches this guide covers.

 

DCS-7358X4 and DCS-7368X4 Front Panel (fully populated)



1 Supervisor Module 3 Linecard Ejector Latch
2 Supervisor Ejector Latch 4 ESD

 

DCS-7289R3A Front Panel (fully populated)



1 Supervisor Module 3 Linecard Ejector Latch
2 Supervisor Ejector Latch 4 ESD

 

Parts List

Each switch provides an accessory kit containing the parts required to install the switch into a four-post rack. The following sections list the installation parts provided by the accessory kit.

This section discusses the following topics:

Parts Used in All Configurations

Quantity Description
One for each AC power supply module supplied with switch Power cables: 14 AWG, C19-C20
One RJ-45 Patch Panel Cable, 2 meters.
One RJ-45 to DB9 Adapter Cable, 2 meters.

 

Warning:

All provided power cables are for use only with Arista products.

 



 

Four-Post Rack Mount Parts

Quantity Description
2 Mounting Ears
1 Left shelf.
1 Right shelf.

 

 

Figure 1. Four-Post Rack Mount Parts

1 Left Shelf 2 Right Shelf

 

Status Indicators

This section discusses the following topics:

Supervisor Module

The supervisor displays the switch component status and contains Ethernet management and console ports. The Front Panels display the supervisor's location on the switches.

The supervisor provides one serial console port, two Ethernet management ports (one RJ-45, one optical), and one USB port. Four LEDs on the top edge report system status, fan status, power status, and switch module status. The following figure shows the LED status of the supervisor module.

 

Figure 1. Supervisor Module Status LEDs

1 System Status LED 3 Power Supply Status LED
2 Fan Status LED 4 Switch Card Status LED

 

Supervisor Status LEDs

The following table interprets the states of the LED indicators on the supervisor module. When indicating error conditions, refer to LEDs on the specified components to determine the condition’s source.

 

Table 1. Supervisor LED States (1)
LED Name LED State Module State
Power Supply Green All powered modules are operating normally.
Red At least one module has failed.
System Green All linecards are operating normally.
Red At least one linecard has failed.
Switch Card Green Module is operating normally.
Red Module has failed.
Fan Amber At least one fan is missing or has failed.
Green All modules are operating normally.
Red Additional functional fans need to be installed on the switch.
1 If all Status LEDs are OFF, check the following: power feeds are live, power supplies are installed, the Switchcard is properly seated, and The supervisor is properly seated. The system will only power up if all four conditions are valid.

 

Line Card Module Indicators

Each line card module provides one status LED plus LEDs for each port on the card. The figures in Linecards indicate the location of the LEDs on each line card. The following figure displays the status LED and Port LEDs on the DCS-7368-16C line card. Arrows indicate the port status being displayed by the corresponding port status LED.

Figure 2. Linecard Status LEDs (DCS-7368-16C)

1 Linecard Port LEDs 2 Linecard Status LED 3 Linecard Ejector Latch

 

The Line Card Status LED is in the center of the DCS-7368-16C. The following table interprets the states of the Status LED.

 

Table 2. Linecard Status LED States
LED State Status
Off Line card not inserted.
Green Line card operating normally.
Amber Line card administratively shut down.
Red Line card has failed.

 

The following tableinterprets the port LED states.

 

Table 3. Linecard Port LED States
LED State Status
Off The port link is down.
Green Port link is up.
Yellow Port is disabled in the software.

 

Fan Module Status Indicators

The fan modules are inserted into the switch card module. Each switch contains one switch card and five fan modules. Rear Panels displays the rear panel of the switch. The following figure displays the fan module indicator. The fan handle color indicates the airflow direction. All fan modules must have the same color handle.

 

Note: The orientation of the fan module as inserted in the switch may be different from the one shown.

 

Figure 3. Fan Status LEDs

1 Fan Release Handle 2 Fan Installation Indicator 3 Fan Status LED

 

The fan installation Indicator is green when the fan module is properly installed or red when the module is not fully installed. The following table interprets the states of the Fan Status LED.

 

Table 4. Fan Status LED States
LED State Status
Off The module is inserted but not receiving power – it may not be properly seated.
Green The module is operating normally.
Red The module has failed.

 

Power Supply Status Indicators

Power Supply LEDs are on power supply modules. The rear panel contains power supply modules for all switches. The Rear Panels display the position of these LEDs on each switch.

The following figure displays a power supply module.

The power supply handle indicates the power supply fan direction. Verify that the airflow direction of all modules has the same color handles.

 

Figure 4. Power Supply

1 Power Supply Status LED

 

The following table interprets the state of the Power Supply Status LED.

 

Table 5. Power Supply Status
LED Status
Green Power Supply module operating normally.
Off No AC power to the module.
Red Module has faulted.
Blinking Green PSU has AC power but hasn't been enabled by the system - indicates that either the power supply or the Switch Module isn't fully inserted.

 

Configuring the Switch

Arista switches ship from the factory in Zero Touch Provisioning (ZTP) mode. ZTP configures the switch without user intervention by downloading a startup configuration file or a boot script from a location specified by a DHCP server. To manually configure a switch, ZTP is bypassed. The initial configuration provides one username (admin) that is accessible only through the console port because it has no password.

When bypassing ZTP, initial switch access requires logging in as admin with no password through the console port. Then, you can configure an admin password and other password-protected usernames.

This manual configuration procedure cancels ZTP mode, logs into the switch, assigns a password to the admin, assigns an IP address to the management port, and defines a default route to a network gateway.

  1. Provide power to the switch (Powering the Modular Switch).
  2. Connect the console port to a PC (Connecting Serial and Management Cables).

    As the switch boots without a startup-config file, it displays this message through the console:

    The device is in Zero Touch Provisioning mode and is attempting to
download the startup-config from a remote system. The device will not
be fully functional until either a valid startup-config is downloaded
from a remote system or Zero Touch Provisioning is cancelled. To cancel
Zero Touch Provisioning, login as admin and type 'zerotouch cancel'
at the CLI.
localhost login:
  3. Log into the switch by typing admin at the login prompt. 
    localhost login: admin
  4. Cancel ZTP mode by typing zerotouch cancel. IMPORTANT: This step initiates a switch reboot. 
    localhost> zerotouch cancel
  5. After the switch boots, log into the switch again by typing admin at the login prompt. 
    Arista EOS
localhost login: admin
Last login: Fri Mar 15 13:17:13 on console
  6. Enter global configuration mode. 
    localhost> enable
localhost# config
  7. Assign a password to the admin username using the username secret command. 
    localhost(config)# username admin secret pxq123
  8. Configure a default route to the network gateway. 
    localhost(config)# ip route 0.0.0.0/0 192.0.2.1
  9. Assign an IP address 192.0.2.8/24 in this example) to an Ethernet management port. 
    localhost(config)# interface management 1/1
localhost(config-if-Ma1/1)# ip address 192.0.2.8/24
  10. Save the configuration by typing write memory or copy running-config startup-config. 
    localhost# copy running-config startup-config
  11. When the management port IP address is configured, use this command to access the switch from a host using the address configured in Step 9. 
    ssh admin@192.0.2.8

Refer to the Arista Networks User Manual for complete switch configuration information.

Connecting Serial and Management Cables

This section discusses the following topics:

Connecting the Supervisor Cables

The supervisor module contains the console, management, and USB ports. The following figure displays port locations on the DCS-7368-SUP-D switch supervisor card.

 

Figure 1. Supervisor Ports


1 Console Port (Serial) 2 USB Port 3 Ethernet Management Ports

 

  • Console (Serial) Port: Connect to a PC with RJ-45 to DB-9 serial adapter cable. Default switch settings include:
    • 9600 baud
    • No flow control
    • 1 stop bit
    • No parity bits
    • 8 data bits

       

  • Ethernet management port: Connect to 10/100/1000 management network with RJ-45 cable.
  • Ethernet management port (optical): Connect to 1 Gbit management network with SFP connector module and cable.

     

    Figure 2. SFP Port Module Insertion


     

    Connect cables as required to line card module ports. Supervisor and line card module ejectors on the front of the chassis assist with cable management.

     

    Important:

    Excessive bending can damage interface cables, especially optical cables.

     

    Flexion excessive peut endommager les câbles d'interface, en particulier les câbles optiques.

     

  • USB Port: This may be used for software or configuration updates.

     

Connecting the Linecard Modules and Cables

Install required QSFP28, QSFP-DD, and OSFP optic modules in linecard module ports.

 

Note: In some devices, adjacent QSFP ports may require you to rotate the module for insertion.

 

Figure 3. Optical Module Insertion

 

Note: For more information about supported optical transceivers, refer to

https://www.arista.com/assets/data/pdf/Transceiver-Guide.pdf.

 

 

Warning: Excessive bending can damage interface cables, especially optical cables.