10. Take the SCB in slot 0 offline by issuing the request chassis cb offline slot 0 command.
11. Verify that the control board is offline by issuing the show chassis environment cb 0
command:
user@host> show chassis environment cb 0
CB 0 status:
State Offline
Power 1 Disabled
Power 2 Disabled
12. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
13. Remove and replacethe offline SCB on the router with the SCBE. Use the replacement
procedure described in “Removing an MX240 SCB” on page 356.
14. Verify that the installation is successful and SCB0 is online by issuing the show chassis
environment cb 0 command:
user@host> show chassis environment cb 0
CB 0 status
State Online
Temperature 30 degrees C / 86 degrees F
Other details such as power are also displayed along with the state.
15. Verify that the fabric planes come online correctly by issuing the show chassis fabric
summary command:
user@host> show chassis fabric summary
Plane State Uptime
0 Online 2 minutes, 5 seconds
1 Online 1 minute, 55 seconds
2 Online 1 minute, 43 seconds
3 Online 1 minute, 33 seconds
16. Verify that the backup Routing Engine is back online by issuing the show chassis
routing-engine 0 command:
user@host> show chassis routing-engine 0
Routing Engine Status:
Slot 0:
Current State Backup
17. Verify the alarms by issuing the show chassis alarms command:
user@host> show chassis alarms
Alarm Time Class Description
2011-06-01 13:26:56 EDT Major CB fabric links require upgrade/training
2011-06-01 12:10:41 EDT Major Require a fan tray upgrade
The major alarm has changed from CB fabrics are of mixed types to CB fabric links
require upgrade/training, as a switch control board requires training to change links
Copyright © 2017, Juniper Networks, Inc.352
MX240 3D Universal Edge Router Hardware Guide
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