JUNOS Internet Software Network Operations Guide: Hardware
486 ! Configuring the Backup Routing Engine to Assume Mastership on Failure of Keepalives
Configuring the Backup Routing Engine to Assume Mastership on Failure of
Keepalives
Action Configure the backup Routing Engine to automatically assume mastership if it
detects a loss of keepalive responses with the
set chassis routing-engine statement
at the [
edit] hierarchy level:
[edit]
user@host# set chassis redundancy failover on-loss-of-keepalives
Sample Output
[edit]
user@host#
set chassis redundancy failover on-loss-of-keepalives
[edit]
user@host#
set chassis redundancy keepalive-time 300
[edit]
user@host#
commit
commit complete
What it Means The results of issuing this command on the backup Routing Engine are as follows:
! Every 20 seconds of keepalive loss, a message is added to the
/var/log/mastership file.
! After keepalive-time passes, the backup Routing Engine attempts to claim
mastership.
! When the backup Routing Engine claims mastership, it continues to be master
even after the other Routing Engine configured as master has successfully
resumed operation. Therefore, if the backup Routing Engine claims mastership,
you must manually switch mastership.
! The default time before failover will occur is set to 300 seconds (5 minutes).
You can change the default keepalive time period with the
set chassis
redundancy keepalive-time time-in-seconds
command (the range for
keepalive-time is from 2 to 10,000 seconds).
! Keepalive messages are sent every second.
By d
NOTE: By default, a backup Routing Engine does not assume mastership when a
loss of keepalive responses occurs.
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