Removing or Replacing a Member Switch of a Virtual Chassis Configuration

[edit virtual-chassis]
user@vc-primary# delete member removed-member-id

If the Virtual Chassis configuration is nonprovisioned, change the mastership-priority values of each member switch as needed to reconfigure the Virtual Chassis roles. See Configuring Primary Role of a Virtual Chassis.

If you do not want to revert to default factory settings, use commands such as the following to remove Virtual Chassis settings for the mode and VCPs from the removed switch:

The replacement member switch should be powered on and running with the factory default configuration at the end of this step.

Before interconnecting the new switch into the Virtual Chassis in this case, see Add or Replace a QFX5100-24Q Switch with Two Expansion Modules in a QFX5100 Virtual Chassis for details on why, when, and how you should do this step.

• Enable automatic software update on the Virtual Chassis. See Configuring Automatic Software Update on Virtual Chassis Member Switches. The Virtual Chassis will automatically update the software on the replacement switch in a later step when it is interconnected and recognized as part of the Virtual Chassis. The replacement switch does not require any action in this case for this step.

• Install the version of Junos OS running on the Virtual Chassis onto the new member switch before interconnecting it into the Virtual Chassis. For EX series switches, see Installing Software on an EX Series Switch with a Virtual Chassis or Single Routing Engine (CLI Procedure), or for QFX Series switches, see Software Installation and Upgrade Overview and Installing Software Packages on QFX Series Devices. In this case, at the end of this step, the replacement switch will be running with the new version of the software and should have the factory default configuration.

  CAUTION:

  You can only set up a QFX5110 Virtual Chassis with both QFX5110 and QFX5100 switches if they are running the same Junos OS image that includes “-qfx-5e-” in the software package filename (from the Junos OS Software Center). If the switch you are replacing in a QFX5110 Virtual Chassis is a QFX5100 switch that you previously installed with a “-qfx-5-” Junos OS image file, you must upgrade the replacement switch to a “-qfx-5e-” image instead before inserting it into the QFX5110 Virtual Chassis. See Upgrading a QFX5100 Switch with a USB Device to Join a QFX5110 Virtual Chassis or Virtual Chassis Fabric. The automatic software update feature can’t update a “-qfx-5-” image to a “-qfx-5e-” image.

• If you are interconnecting a switch using dedicated Virtual Chassis Ports (VCPs), connect one dedicated VCP on the replacement member switch to a dedicated VCP on another member switch in the Virtual Chassis.

• If you are interconnecting a switch using optical ports configured as VCPs:

  On the replacement switch, configure the optical ports that you are using to connect to the Virtual Chassis as VCPs. (You should also configure the optical ports on the existing member switches in the Virtual Chassis where the replacement member switch will be connected, if they are not already configured.) To configure an optical port as a VCP:

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  user@switch> request
  virtual-chassis vc-port set pic-slot 1 port port-number

  Connect one configured optical port VCP on the replacement switch to a configured optical port VCP on another member switch in the Virtual Chassis.

  Note:

  You can set optical port VCPs on a standalone switch before interconnecting one link into an existing Virtual Chassis, or set them after connecting the link. In either case, you must set the ports as VCPs for the primary to detect and complete the process of adding the switch as a member. For more information on setting up VCPs on EX Series switches, see Setting an Uplink Port on an EX Series or QFX Series Switch as a Virtual Chassis Port, and for details on which ports can be configured as VCPs in a QFX Series Virtual Chassis, see Understanding Virtual Chassis Components.

If you are using a switch that does not have an LCD interface, enter theshow virtual-chassis command and view the output to confirm the switch is part of the Virtual Chassis configuration.

• In a nonprovisioned Virtual Chassis, issue the request virtual-chassis renumber command on the primary member switch.

• In a preprovisioned Virtual Chassis, on the primary member switch, reconfigure the member information for the new member switch using the [edit virtual-chassis] member configuration statement.

  To use the same member ID as the member that was replaced, associate the new switch’s serial number (on the back of the switch) with the replaced member ID, as follows:

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  [edit virtual-chassis]
  user@switch# set member replaced-member-ID serial-number new-member-serial-number

  Note:

  You can alternatively use the replace configuration editing command to substitute the serial number of the replacement member switch for the replaced member’s serial number in the existing configuration item for the replaced member.

  To configure the new member switch with a different member ID, associate the new switch’s serial number with the desired member ID and then delete the configuration item for the replaced member switch, as follows:

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  [edit virtual-chassis]
  user@switch# set member new-member-ID serial-number new-member-serial-number
  user@switch# delete member replaced-member-ID