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Gabriell_141363's avatar
Gabriell_141363
Icon for Nimbostratus rankNimbostratus
Dec 19, 2017

LTM HA L3 not L2 connectivity

Hi

 

we're planning to deploy x2 F5 LTM devices in x2 different locations. These 2 nodes should form a cluster and probably an active active (for traffic balancing amonmg both nodes)o ne built up of x2 traffic groups. Our customer is a bit concern about the idea to extend the L2 networks (internal, external, and HA ones) among both Datacenters. Could it be possible to completly avoid the L2 vlans extension between both DC's and use only L3 capabilities both for pool memebers and LTM devices HA subnets (managment, configSync, mirroring vlans)? is it mandatoy that at least the failover ones belong to the same IP subnet on both boxes?

 

Thx in advance. BR Gab

 

application delivery
BIG-IP
config sync
dc
l2vsl3
LTM
pseudowires
  • boneyard's avatar
    boneyard
    Icon for MVP rankMVP
    Dec 24, 2017

    the K article on askf5 points out some best practices

     

    https://support.f5.com/csp/article/K14135

     

    as for your external and internal there is less need for L2 connectivity, but you do have to work out the rest of your routing.

     

    while active / active always sounds nice, it does become more complex and if you load above 50% you kinda lose redundancy.