user@host# configure
user@host# set chassis state cb-upgrade on
user@host# commit
6. Determine the order to replace the existing SCB-MXs with upgraded ones. SCB 0, SCB 1, and SCB 2
are available for the MX960. SCB 0 is associated with RE0, SCB 1 is associated with RE1, and SCB 2
is the spare SCB. The SCB upgrade order for the MX960 is:
•
Upgrade the SCB in the Spare Slot 2 (SCB 2)
•
Upgrade the SCB in the Backup Routing Engine Slot 1 (SCB 1)
•
Upgrade the SCB in the Master Routing Engine Slot 0 (SCB 0)
NOTE: Do not add or remove any router hardware during the upgrade procedure.
Upgrade the SCB-MX in the Spare Slot 2 (SCB 2)
1. Take the fabric plane offline by issuing the request chassis fabric plane 4 offline command.
2. Verify that fabric plane 4 is offline by issuing the show chassis fabric summary command.
user@host> show chassis fabric summary
Plane State Uptime
4 Offline
5 Online 1 hour, 15 minutes, 35 seconds
3. Take the next fabric plane offline by issuing the request chassis fabric plane 5 offline command, and
then verify that the fabric plane is offline by issuing the command given in Step 2.
4. Take the SCB-MX in slot 2 offline by issuing the request chassis cb offline slot 2 command.
5. Verify that the control board is offline by issuing the show chassis environment cb 2 command:
user@host> show chassis environment cb 2
CB 2 status:
State Offline
Power 1 Disabled
Power 2 Disabled
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