Forum Discussion

philvirtual's avatar
philvirtual
Icon for Nimbostratus rankNimbostratus
May 30, 2017

Same Subnet VIP/Pool

I have an existing config with these two interfaces for my public-facing DMZ web servers : 1.1 (internal - vlan 200) and 1.3 (external - vlan 2001). All the existing VIPs are in 2001 and the pool m...
application delivery
LTM
rob_carr's avatar
rob_carr
Icon for Cirrostratus rankCirrostratus
May 30, 2017

If the traffic is coming from and being load balanced to the same network segment, then you only need to configure a single interface/VLAN (in your example, VLAN 4). This is what F5 refers to as a 'one-arm' or 'one-IP' configuration. You didn't say which version you are running, so this may not be the correct implementation guide for you, but it should give you an idea of how to configure for your situation: LTM Implementations: Configuring a One-IP Network Topology.

 

You need to pay special attention to how you configure SNAT behavior going forward - without a SNAT, the host you are forwarding traffic to can reply directly to the source of the traffic, which will result in connections being reset by the originating host. Again, this may not be the correct manual for your version, but have a look at this information about SNATs: LTM Concepts: SNATs.