JUNOS Internet Software Network Operations Guide: Hardware
504 ! Displaying Redundant Routing Engine Errors
For M40e and M160 routers, you can also use the show chassis craft-interface
command. The command output shows the master and backup Routing Engine
LED status; for more information, see “Monitoring the Routing Engine Status” on
page 136.
Displaying Redundant Routing Engine Errors
Action To view redundancy log messages, use the following CLI command:
user@host> show log mastership
Sample Output
user@host>
show log mastership
[...Output truncated...]
May 13 11:18:31 RE mastership msg error: subtype 52
May 13 11:18:32 failed to receive loss of keepalives from other RE for the last
20 sec
[...Output truncated...]
What It Means The /var/log/mastership file records error messages from redundancy logging. The
file records the time of the message and a description of the message. A message is
logged after 20 seconds of keepalive loss.
Manually Switching from Master to Backup Routing Engine
Action To manually switch from master to backup Routing Engine, or to force the backup
Routing Engine to become master, use the following CLI command:
user@host> request chassis routing-engine master release
You can also use the following CLI command:
user@host> request chassis routing-engine master switch
For routers with multiple Routing Engines only, you can control which Routing
Engine is the master.
By default, the Routing Engine in slot 0 (
RE0) is the master and the Routing Engine
in slot 1 (
RE1) is the backup. To change the default master Routing Engine, include
the
routing-engine statement at the [edit chassis redundancy] hierarchy level in the
configuration. For more information, see the JUNOS System Basics Configuration
Guide.
WARNING: For routers that have two Routing Engines, both Routing Engines must
be running JUNOS Release 4.0 or later. Do not run JUNOS Release 3.4 on one of
the Routing Engines and Release 4.0 on the other. JUNOS software Release 3.4
does not support Routing Engine redundancy. If you are using this release of the
software, only one Routing Engine can be installed in either slot in the router.
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