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Replacing a Member Switch of a Virtual Chassis Configuration (CLI Procedure)

Note: This topic does not apply to Virtual Chassis Fabric (VCF) or EX8200 Virtual Chassis. See Removing a Device From a Virtual Chassis Fabric or Adding or Replacing a Member Switch or an External Routing Engine in an EX8200 Virtual Chassis (CLI Procedure).

You can replace a member switch in a Virtual Chassis without disrupting network service on the other members. You can retain the existing configuration of the member switch and apply it to a new member switch, or you can free up the member ID and make it available for assignment to a new member switch.

If you want to replace a member switch of a mixed Virtual Chassis that contains EX4200, EX4500, or EX4550 switches, see Removing an EX4200, EX4500, or EX4550 Switch From a Mixed Virtual Chassis (CLI Procedure).

To replace a member switch, use the procedure that matches what you need to accomplish:

• Remove, Repair, and Reinstall the Same Switch
• Remove a Member Switch, Replace It with a Different Switch, and Reapply the Old Configuration
• Remove a Member Switch and Make Its Member ID Available for Reassignment to a Different Switch

Remove, Repair, and Reinstall the Same Switch

1. Power off and disconnect the member switch to be repaired.
2. Repair, as necessary.
3. Reconnect the switch and power it on.

Remove a Member Switch, Replace It with a Different Switch, and Reapply the Old Configuration

If you are unable to repair a member switch, you can replace it with a different member switch while retaining the previous configuration. The master stores the configuration of the member that was removed. When you connect a different member switch, the master assigns a new member ID. But the old configuration is still stored under the previous member ID of the previous member switch.

Note: If you have used a preprovisioned configuration, you can use the replace command to change the serial number in the Virtual Chassis configuration file. Substitute the serial number of the replacement member switch (on the back of the switch) for the serial number of the member switch that was removed. To remove and replace a switch and reapply the old configuration:

1. Power off and disconnect the member switch to be replaced.
2. If the replacement member switch has been previously configured, revert that switch’s configuration to the factory defaults. See Reverting to the Default Factory Configuration for the EX Series Switch for information on reverting to the factory default configuration on an EX Series switch or Reverting to the Default Factory Configuration for information on reverting to the factory default configuration on a QFX Series switch.
3. If you are interconnecting a switch using a dedicated VCP, connect one VCP on the replacement member switch to a VCP of another Virtual Chassis member switch.

   If you are interconnecting a switch using an optical port configured as a VCP, cable the optical ports together then configure the port on the Virtual Chassis as a VCP:

   
user@switch> request virtual-chassis vc-port set pic-slot 1 port port-number
4. Power on the new member switch.
5. Confirm that the new member switch is now included in the Virtual Chassis configuration by checking the front-panel LCD or the for the member ID. It should display a member ID in the range from 0 through 9.

   If you are using a switch that does not have an LCD interface, confirm the switch is part of the Virtual Chassis configuration by entering the show virtual-chassis and reviewing the output.

6. Cable the other VCP on the new member switch into the Virtual Chassis. Use the instruction in step 3 to complete this step.

   Caution: If you immediately cable both VCPs on the new switch into the existing Virtual Chassis at the same time, a member switch that was already part of the Virtual Chassis might become nonoperational for several seconds. Network traffic to this switch is dropped during the downtime. The member switch will return to the normal operational state with no user intervention, and normal operation of the Virtual Chassis will resume after this downtime.

7. On the master switch, Issue the request virtual-chassis renumber command from the Virtual Chassis master to change the member switch’s current member ID to the member ID of the member switch that was removed from the Virtual Chassis configuration.

Remove a Member Switch and Make Its Member ID Available for Reassignment to a Different Switch

When you remove a member switch from the Virtual Chassis configuration, the master keeps that member switch’s member ID in reserve. To make that member switch’s member ID available for reassignment, issue the request virtual-chassis recycle command from the Virtual Chassis master.

Note: When you add or delete members in a Virtual Chassis configuration, internal routing changes might cause temporary traffic loss for a few seconds.