active - active status

Forums Technical Forums
1

Set up:

  • Two (2) F5 rSeries load balancers, in HA set up, in active - standby status.
  • Their ConfigSync is within the same traffic group.
  • Both of their Self IP addresses are reachable from each other.

Configuration change:

  • After changing the management IP address of the two F5 load balancers, their status suddenly changed to active - active.
  • In order to make their status return to active - standby, we redeployed in F5OS.

Question:

  • Is that sudden change to active - active status considered as expected behavior?
2

If you changed the IPs and they aren’t able to reach each other on these IPs that would absolutely cause an active/active situation. I believe you will also have to update the HA configuration, I can’t remember the exact spot, that was using that old management IP. I think the easiest way to find this spot would be to perform a config diff and see what didn’t carry over.

3

Yep. Check the unicast addresses on each tenant (show cm device).

Normally, you should have two IPs configured - the management IP and a self IP. This helps to prevent a split brain scenario if the devices can’t reach each other on one set of IPs.