Forum Discussion
Muhammad_57196
Nimbostratus
NimbostratusActive Active Datacenter design
We are going through design phase of the our project that involves the following:
1. Two datacenters (apart 15 km) running active/active.
2. We have layer 2 connectivity at each ...
L4L7_53191Nimbostratus
NimbostratusActive/Sandby is best practice for BigIP.
With a design like yours, just keep in mind (an obvious point) that the L2 connectivity between centers is absolutely critical. It works very well overall, but I've seen at least one case where the heartbeat VLAN was clobbered for whatever reason (user error, etc.), which caused a 'split brain' deal where both of the BigIPs went active. Whenever a BigIP goes active it'll issue a GARP on each VLAN it is connected to, which can be bad when the systems are both claiming ownership of all of the floating resources (VIPs, Self-IPs, etc.).
Be sure and use MAC masquerade, etc. as well...
-Matt
Rabbit23_116296Is L2 absolutely critical to have an Active/Standby automatic failover design?
