Juniper EX4200 Hardware Manual page 228

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.
6. Confirm that the new member switch is now included in the Virtual Chassis configuration on switches
with a front-panel LCD by checking the display for the member ID. It should show a member ID in the
range from 0 through 9.
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.
7. Cable the other VCP on the replacement member switch into the Virtual Chassis based on how you
planned to interconnect the switch in Step
CAUTION:
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.
8. IF you need to update the new member switch's current member ID to the member ID of the switch
that was removed from 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:
[edit virtual-chassis]
5 of this procedure.
If you immediately cable both VCPs on the new switch into the existing
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