Remove A Member Switch, Replace It With A Different Switch, And Reapply The Old Configuration - Juniper EX4200-24T Hardware Manual

EX4200 Switch Hardware Guide

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

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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.
To remove and replace a switch and reapply the old configuration:
Power off and disconnect the member switch to be replaced.
1.
If the replacement member switch has been previously configured, revert that switch's
2.
configuration to the factory defaults. See Reverting to the Default Factory Configuration
for the EX Series Switch for information about reverting to the factory default
configuration on an EX Series switch or Reverting to the Default Factory Configuration
for information about reverting to the factory default configuration on a QFX Series
switch.
The replacement member switch should be powered on and running with the factory
default configuration at the end of this step.
(Required when automatic software update is not enabled on the Virtual Chassis and
3.
the new member switch is running a version of Junos OS that is different than the
version of Junos OS running on the Virtual Chassis) Ensure that the correct version of
Junos OS is or will be installed on the new member switch by performing either of the
following tasks:
Enable automatic software update on the Virtual Chassis. See Configuring Automatic
Software Update on Virtual Chassis Member Switches (CLI Procedure). 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. See Installing Software on
an EX Series Switch with a Single Routing Engine (CLI Procedure). The replacement
switch will be running with the new version of the software and the factory default
configuration in this case at the end of this step.
Connect one link from the replacement member switch to the Virtual Chassis as
4.
follows, depending on which type of ports you are using:
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. (The optical ports on the existing members in the
Virtual Chassis where the replacement member will be connected should be
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