My network topology is as per the nwtopo.jpg file. Now in this if I want to do load balance for the server farm-2. How would my physcial and logical connectivity look like and how would my routing will happen..
For some security reasons I cannot change the gateway of the servers (on both the server farm) and both the server farms to be connected through a firewall.
Well the main difference between serverfarm 1 and 2 is that serverfarm 2 is not local to the CSS, you need to make sure that the traffic flows back to the CSS before going to the client.
The common way to do this is by configuring source nating in the CSS, this will prevent asymmetric flows, this is exactly the same you are doing for serverfarm 1 where the default gateway cannot be changed.
This is how a flow to the VIP would work
1. Client to 192.168.10.171
2. CSS NAts and sends frame with source 192.168.10.171 destined to 192.168.20.x
3. Server will respond back to VIP 192.168.10.171
4. CSS answers to client request with source IP as the VIP
As for routed traffic to the servers there should be no problem, the CSS will not be in the middle on this case, so if you need to do direct management to your servers the CSS will not be involved and everything should work fine.
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