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newf5learner
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Aug 23, 2016

F5 connection mirroring - Active standby pair with network failover (vlan)

Hi,

 

I have a pair of F5 devices in Active standby pair. I have used network failover with a ethernet cable between the two LTMs on interface 1.8 with failsafe vlan.

 

Self-IP address for Failsafe vlan in Unit-A = 172.16.10.1 self-IP address for Failsafe vlan on Unit-B = 172.16.10.2

 

And on Unit-A: Mirroring Configuration Primary Local Mirror Address= 172.16.10.1

 

And on Unit-B: Mirroring Configuration Primary Local Mirror Address= 172.16.10.2

 

Floating self-ip address on external vlan - 10.70.10.1

 

Without any connection mirroring turned on the VIPs, during a failover how will the standby unit know about the connections I have it on external vlan? Do the client needs to re-establish the connections to the VIPs after the failover? How does the floating self-IP address on external vlan failover onto the other unit and will all the existing connections on floating IP remains unchanged ? Please advise.

 

1 Reply

  • Without connection mirroring enabled, the standby won't know of the connections in the active device and after failover, established connections may be dropped. Clients would have to re-establish connections. Floating IP address will get mapped to the MAC address of the newly active F5 instead of the previously active F5.