Juniper MX240 - Page 390

To prepare the MX240 router for the Enhanced MX Switch Control Board (MX SCBE)
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: mx240
Junos Base OS Software Suite [11.4-20110530];
NOTE: The MX SCBE 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 MX SCB boards are installed by issuing the show chassis hardware
command.
user@host> show chassis hardware
Item Version Part Number Serial Number Description
CB0 REV 07 710-021523 ABBC8281 MX SCB
CB1 REV 07 710-021523 ABBC8323 MX SCB
SCB details are displayed as above, along with other hardware components. The
MX240 router has only two SCBs, and each SCB has four fabric planes.
3. Establish console connections to both Routing Engines. You can use a telnet session
to connect to the router console by issuing the <router name>-con command. For
example, if the router name is juniper, you can connect to RE0 and RE1 consoles by
issuing the telnet juniper-con and telnet juniper1-con commands.
4. Ensure that graceful switchover (GRES), commit synchronize (required for nonstop
routing), and nonstop routing (NSR) are enabled or configured by running the set
chassis redundancy graceful-switchover, set system commit synchronize, set
routing-options nonstop-routing commands.
NOTE: These commands are mandatory for this upgrade and may be
removed, if desired, after the upgrade.
5. Set the upgrade flag on, and start the SCB upgrade by issuing the set chassis state
cb-upgrade on command.
user@host# set chassis state cb-upgrade on
user@host# configure
Copyright © 2017, Juniper Networks, Inc.360
MX240 3D Universal Edge Router Hardware Guide