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Nick_Simos_6822
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Jun 27, 2014

Complex HA scenario with 3 Big IPs

Hi all,

 

I am trying to implement a complex scenario with 3 LTMs and 3 Partitions.

 

For the first partition (Partition A) a want to be able to failover to all three ltms (LTM_1, LTM_2 and LTM_3) For the second Partition (Partition B) a want to failover only to LTM_1 and LTM_2 and NEVER to LTM_3 The third Partition (Partition C) a want to be served only from LTM_3 and NEVER from LTM_1 and LTM_2

 

Since Partition A must be served from all units, I created failover/sync Device Group with all three in it.

 

The only workaround I found out so far is to mess with vlan ids. So, in case 2, what I did is to alter the vlan ids on LTM_3 so if LTM_1 and LTM_2 fail, LTM_3 will come active but the VIPs reside to an isolated vlan, preventing them to be advertised to the rest of the network.

 

Any ideas?

 

  • I have already tried that. HA Order uses all units in a specific order.So, if a choose only LTM_1 and LTM_2, when both of them are down then LTM_3 becomes active.

     

  • HA Order uses all units in a specific order.So, if a choose only LTM_1 and LTM_2, when both of them are down then LTM_3 becomes active.

     

    not sure if this is possible. can we configure ha group but preventing LTM_3 to participate in failover (e.g. fake pool, fake trunk)?

     

    Release Note: BIG-IP LTM and TMOS 11.5.0 (HA group failover for traffic groups)

     

    http://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/product/relnote-ltm-11-5-0.html

     

    by the way, there is request for enhancement but it is not implemented in the current version yet. you may open a case to see if you can expedite it.

     

    ID403789 - RFE: Allow creation of traffic group with a subset of the devices in the sync-failover device group