Upgrading The Scb In The Backup Routing Engine - Juniper mx240 Hardware Manual

Upgrading the SCB in the Backup Routing Engine

Copyright © 2016, Juniper Networks, Inc.
TIP: MX240 has two slots for SCB—that is, SCB0 and SCB1—and these
correspond to RE0 and RE1, respectively, where SCB1 is the first SCB.
To upgrade the SCB in the backup Routing Engine:
Power down the backup Routing Engine from the master Routing Engine by issuing
1.
the
request system power-off other-routing-engine
Verify that the Routing Engine is powered down by issuing the
2.
routing-engine 1 command. The slot of the Routing Engine may be 0 or 1, and is shown
as 1 in this example:
user@host> show chassis routing-engine 1
Routing Engine Status:
Slot 1:
Current State Present
Verify that the Current State is Present, which indicates that the Routing Engine is
offline.
Take the fabric plane offline by issuing the
3.
command. SCB1 has four fabric planes numbered, 4, 5, 6, and 7.
Verify that the fabric plane is offline by issuing the
4.
command.
user@host> show chassis fabric summary
Plane State Uptime
4 Offline
5 Online 1 hour, 15 minutes, 35 seconds
Verify that the 'State' of Plane 4 is Offline.
Take the remaining fabric planes offline by issuing the
5.
command—that is, by changing the fabric plane number each time. Verify
5/6/7 offline
that the fabric planes are offline by issuing the command given in Step 2.
Take the SCB in slot 1 offline by issuing the
6.
Verify that the control board is offline by issuing the
7.
command:
user@host> show chassis environment cb 1
CB 1 status:
State Offline
Power 1 Disabled
Power 2 Disabled
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
8.
the strap to one of the ESD points on the chassis.
Remove and replace SCB1 on the router with the SCBE. Use the replacement procedure
9.
described in"Removing an MX240 SCB" on page
Chapter 27: Replacing Switch Fabric Components
command.
show chassis
request chassis fabric plane 4 offline
show chassis fabric summary
request chassis fabric plane
request chassis cb offline slot 1
show chassis environment cb 1
335.
command.
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