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Stefan_Klotz_85's avatar
Stefan_Klotz_85
Icon for Cirrus rankCirrus
Dec 11, 2014

Standby LB becomes Active during HA software update

Normally a software update within the same major release and especially just a Hotfix update is a very easy and less critical task without any downtime. We are using the following steps:   relice...
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Stefan_Klotz's avatar
Stefan_Klotz
Icon for Cumulonimbus rankCumulonimbus
Dec 16, 2014

This night I had another 2 software updates (just the latest Hotfix) with TMOS 11.4.1, one cluster was totally fine (both LBs came up properly as Standby after the reboot into the new partition), but for the other cluster the first reboot ended up in Active mode. The second device of this cluster came up as Standby after the reboot. There is no HA-group nor any other failsafe feature in use. The device which came up as Active has the lower IP on mgmt- and heartbeat-VLAN (if that matters). Network failover is just using the heartbeat VLAN, no traffic via mgmt-IP.

 

The question is, does this depends on any specific configuration or can be avoided with one or is this some random behavior?

 

Ciao Stefan :)