Prepare For The Upgrade - Juniper MX480 Hardware Manual

NOTE: Junos OS does not support in-service upgrades to the SCBE-MX on routers with an
MX-MPC3E-3D or MX-MPC3-3D MPC. If your MX router has these MPCs, you'll need to
shutdown the system before you do the upgrade. An in-service upgrade can result in service
disruption.

Prepare for the Upgrade | 412

1.
Upgrade the SCB-MX in the Backup Routing Engine | 414
2.
Upgrade the MX480 SCB-MX in the Master Routing Engine | 416
3.
Complete the SCBE-MX Upgrade | 419
4.
Prepare for the Upgrade
Before you do the upgrade, open a telnet session to the master Routing Engine CLI operational mode and
issue the configure exclusive command. This command locks the configuration to prevent accidental
changes during the upgrade process.
TIP: To prevent traffic loss during the upgrade process, we recommend that you operate the
line cards at 50% line rate. This 50% limit must be maintained per PFE on each line card.
To prepare the MX480 router for the Enhanced MX Switch Control Board (SCBE-MX) upgrade:
1. Verify that the system runs Junos OS Release 11.4 or later by issuing the show version command on
the master router.
user@host> show version
Model: mx480
Junos Base OS Software Suite [11.4-20110530];
NOTE: The MX SCBE-MX is supported only in Junos OS Release 11.4 or later.
The latest software ensures a healthy system—that is, Routing Engines, control boards, and FPCs—before
the upgrade.
2. Verify that SCB-MX boards are installed:
412