Regulatory Model Numbers

The following table lists the regulatory model numbers (RMNs), where applicable, for the product models for the switches described in this document

Table 1. Regulatory Model Numbers and Product Numbers
Regulatory Model (RMN) Product Number(s)
DCS-7388 DCS-7388X5

Maintenance and Field Replacement

There is a linecard and supervisor removal tool to facilitate the removal and installation of linecards and supervisor modules. Use the tool as a sleeve on the release handle. It is mounted on the supervisor module Front Panels. Replace the tool after each use.

 

Note: Follow ESD protection protocols while handling components of the switch during maintenance operations.

Switch Card Module

 

The switch card module is accessible from the rear of the switch as shown in Rear Panels. Refer to the following figure for more details on the removal and replacement of the switch card module.

Figure 1. Switch Card Module Maintenance
 
1 Switch Card Release Handle (Swing Arm) 2 Switch Card Release Buttons

 

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 it is removed from the chassis.

Removing the Switch Card Module

The switch card module can include the fans and the power supplies. The release handle is a swing arm that is used for unseating and seating the switch card module.

Follow the steps listed below to remove the switch card module from the switch chassis.

  1. Ground yourself with an ESD wrist strap.
  2. Push the switch card release buttons.
  3. Move the release handle (swing arm) down.
  4. Carefully, remove the switch card module from the chassis while supporting it through the process.

Inserting the Switch Card Module

 

The module insertion process is the inverse of the removal procedure. Follow the steps listed below to insert the switch card module into a chassis.

 

  1. Align the switch card module with the rails in the chassis for insertion.
  2. Lower the release handle (swing arm) down. Slide the module until it stops.
    Note: The module will stop sbout 8 mm (1/3") from the back of the switch.

     

  3. Close the release handle (swing arm) to its locked position (up) until both the green buttons pop out.
    Note: The upward swing arm movement will push and seat the switch card module. The green buttons pop out to indicate that the switch card module is locked. When locked, the release handle will not move down.

     

Power Supplies

 

The power supplies are accessible from the rear of the switch (Rear Panels). Refer to the following figure for more details on the removal and replacement of a power supply unit.

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

 

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 to be removed by disconnecting the AC power cable.
  3. Push the power supply release handle and remove the power supply as shown in the figure below.
    Figure 2. Removing a Power Supply

     

    Note: PSUs are hot swappable and do not require the removal of the switchcard. The illustration shows the switchcard removed for clarity.

     

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.
    Note: he 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 output of the command 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. Refer to the following figure for more details on the removal and replacement of a fan module.

Removing a Fan Module

 

The following steps are required when removing or replacing fans from a switch.

Note: A representative fan is shown for the task. For the fan on your device refer to Fan Module Status Indicators for the location of the release.

 

 

  1. Ground yourself with an ESD wrist strap.
  2. Pinch the fan module release lever and slide the fan module out of the switch as shown in the figure below.
    Figure 3. Removing Fan Module

     

    Note: Fans are hot swappable and do not require the removal of the switchcard. The illustration shows the switchcard removed for clarity.

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 when the fan is 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. The LED is amber when a wrong fan is installed.

     

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 the removal and replacement of a supervisor module.

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

Removing Supervisor Module

The supervisor module has a release handle with a push button latch indicator. The ejector tool works for both the linecards and the supervisor.

Perform the following steps to remove the module.

  1. Put on a grounded ESD strap.
  2. Remove the linecard and supervisor removal tool from the front of the switch Front Panels.
  3. Push in the latch indicator button.
    Note: The handle will rotate freely without loosening the supervisor module if the latch indicator button is not pushed in.

     

  4. Attach the removal tool to the supervisor module ejector handle.
  5. Use the tool to rotate the ejector handle counterclockwise to release the supervisor module.
  6. Gently remove the supervisor module by pulling outwards once the tool rotation stops moving the supervisor module outwards (approximately five turns).

Installing 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 supervisor module into slot.
  4. Push the latch indicator button in.
  5. Use the removal tool to rotate the ejector handle clockwise until the tool rotates freely.
  6. Remove the tool to see if the latch indicator button has popped out.
    Note: The latch indicator button pops out and the tool rotates freely when the supervisor is fully seated.

     

     

    Note: Hand tightening is sufficient for installation.

     

Linecards

 

The linecards are accessible from the front of the switch as shown in Front Panels. The linecards are hot-swappable. You must take into account that the linecard you are inserting is compatible with the switch and the linecard that you are replacing. Refer to the following figure for more details on the removal and replacement of a linecard module.

Note: A representative linecard is shown for illustration.
Figure 4. Linecard Module Maintenance
 
1 Linecard Metal 3 Latch Indicator Button 5 Linecard Metal
2 Ejector (Release) Handle 4 Engaging and Aligning, Geared Screw    

Removing a Linecard

 

Perform the following steps to remove a linecard.

  1. Put on a grounded ESD strap.
  2. Remove the linecard (and supervisor) removal tool from the front of the switch Front Panels.
  3. Push in the latch indicator button on the linecard to be removed.
    Note: The handle will rotate freely without loosening the linecard if the latch indicator button is not pushed in.

     

  4. Attach the tool to the linecard ejector handle.
  5. Use the tool to rotate the handle counterclockwise to release the linecard.
  6. Gently remove the linecard by pulling outwards.

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. Push the latch indicator button in.
  5. Use the removal tool to rotate the ejector handle clockwise until the tool rotates freely.
  6. Remove the tool to see if the latch indicator button has popped out.
    Note: The latch indicator button pops out and the tool rotates freely when the linecard is fully seated.

     

    Note: Hand tightening is sufficient for installation.

     

  7. Verify that the linecard is operating normally (Linecard Module Indicators).

Linecards

The following illustrations display the linecards supported by modular switches covered by this guide.

Figure 1. DCS-7388-16CD and DCS-7388-16CD2


1 Linecard 3 Linecard Status LED 5 Port Status LEDs
2 Linecard Ejector (Release) Handle 4 Linecard Ports    

 

Figure 2. DCS-7388-8D and DCS-7388-8DR


1 Linecard 3 Linecard Status LED 5 Port Status LEDs
2 Linecard Ejector (Release) Handle 4 Linecard Ports    

Rear Panels

The following illustration displays the rear panel of all switches covered by this guide.

Figure 1. DCS-7388X5 Rear Panel
1 Switch Card Module Release Handle 4 Fan Module Release 7 PSU Release
2 Switch Card Module Release Buttons 5 Fan Status LED 8 PSU
3 Fan 6 PSU Status LED 9 Ground

 

Note: Touch points are colored green.

Front Panels

The following illustration displays the front panel of all switches covered by this guide.

Figure 1. DCS-7388X5 Front Panel (fully populated)
1 ESD Attach Point 3 Supervisor and Linecard Ejector Handle (Release) and Latch Indicator Button 5 Pull Tag (for Switch Information)
2 Supervisor Module 4 Supervisor and Linecard Removal Tool 6 Linecard

 

Note: Touch points are colored green.

Parts List

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

Parts Used in All Configurations

 

 

Table 1. Parts Used in All Configurations
Quantity Description
One for each AC power supply module supplied with switch. Power cables: TBD
One RJ-45 Patch Panel Cables, 2 meters.
One RJ-45 to DB9 Adapter Cable, 2 meters.

 

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

 

Four-Post Rack Mount Parts

 

Table 2. Four-Post Rack Mount Parts
Quantity Description
Two Mounting Ears
One Left shelf
One Right shelf

 

Figure 1. Four-Post Rack Mount Parts
1 Left Shelf 2 Right Shelf

Status Indicators

Supervisor Module Status Indicators

The supervisor displays switch component status and contains Ethernet management and console ports. The supervisor location is on the Front Panels of the switch.

The supervisor provides one serial console port, one Ethernet management port, 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 supervisor module status LEDs.

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 error conditions are indicated, refer to LEDs on the specified components to determine the condition’s source.

Table 1. Supervisor LED States
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 There are insufficient functional fans installed in the switch.

(1): If all Status LEDs are OFF, check the following: power feeds are live, power supplies are installed, Switch Card is properly seated, and Supervisor is properly seated. The system will not power up unless all four of these conditions are valid.

Linecard Module Indicators

Each linecard module provides one status LED plus LEDs for each port on the card.

The following figure displays the status LED and port LEDs on the DCS-7388-16CD linecard. Arrows indicate the port status being displayed by the corresponding port status LED.

Figure 2. Linecard status LEDs (DCS-7388-16CD)
1 Linecard 3 Linecard Status LED 5 Port Status LEDs
2 Linecard Ejector (Release) Handle 4 Linecard Ports    

 

The Linecard Status LED is in the center of the DCS-7388-16CD. The following tables interpret the states of the Status LED and the port LED.

Table 2. Linecard Status LED States
LED State Status
Off Linecard not inserted.
Green Linecard operating normally.
Yellow (amber/orange) Linecard administratively shut down.
Red Linecard has failed.

 

Table 3. Linecard Port LED States (SFP, QSFP)
LED State Status
Off Port link is down.
Green Port link is up.
Yellow (amber/orange) Port is disabled in the software.

 

Table 4. Linecard Port LED States (OSFP, QSFP-DD)
LED State Status
Off Port link is down for enabled interfaces.
Green Port link is up for enabled interfaces and all links are good.
Yellow (amber/orange) Port is disabled in the software for all interfaces or a link is bad.

Fan Module Status Indicators

The fan modules are inserted into the switch card module. Each switch contains one switch card and five fan modules accessible from the Rear Panels of the switch.

The fan module indicator is displayed in the following figure. 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 Airflow Direction Indicator Bezel Color 2 Fan Release Handle 3 Fan Status LED

 

The following table interprets the states of the Fan Status LED.

Table 5. Fan and switch card 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 power supply modules for all switches are accessible from the Rear Panels of the switch.

The following figure displays a power supply module.

The power supply handle indicates the power supply airflow direction. Verify the airflow direction of all fan and power modules. All modules should have the same color handles.

Figure 4. Power Supply
1 Power Supply Status LED

 

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

Table 6. 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) 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 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 with 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

    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

Connecting Supervisor Cables

Supervisor module contains the console, management, and USB ports. The following figure displays port locations on DCS-7388-SUP-D supervisor.

Figure 1. Supervisor Ports
1 USB Port 3 Ethernet Management Port 5 Torque Clutch Tool (shared by Supervisor and Linecards)
2 Console Port (Serial) 4 Supervisor Release    

 

  • 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.

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: May be used for software or configuration updates.

Connecting 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 2. Optical Module Insertion (representative)

 

Note: For more information about supported optical transceivers, refer to https://www.arista.com/en/products/transceivers-cables.

 

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