CirrostratusHi,
I am pretty sure it should work but can't find direct confirmation and some real life experiences if it's reliable or should be avoided.
Let's say there are two DCs with separate subnets. There are two LTMs, one per DC. Those should work in HA pair, let's say Active-Active. Network failover communication can only be setup using routing. Will it work at all? If so what factors should be analyzed in first place?
Piotr
NacreousHi,
at first you need to analyze latency of the failover network. It sould be under 100ms. Also F5 recommends that you configure network failover to communicate over the management network, in addition to a TMM network.
NimbostratusHi, as you have additional infrastructure between the units there is a higher risk of split-brain active/active (same traffic-group going active on both units) and therefore you should consider the connectivity between sites, switch fabric, perimeter firewalls, routing, underlying mpls/optical connections/diversity to understand the availability/SLA of the network connection so that it matches your F5 availability design. Using TMM and mgt will give you diversity locally but if there is a single point of failure somewhere and TMM and mgt follow the same path it'll not be good.
It may be unlikely to have a routed only network between F5s in different DCs if they will present the same applications (VS IPs) at each DC
cheers