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:
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-MX details are displayed as above, along with other hardware components. The
MX480 router has only two SCB-MXs and each SCB-MX 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.
Copyright © 2019, Juniper Networks, Inc.
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