if the traffic crosses the CSM it will be intercepted whatever the mode [briding or routing].
So, if the default gateway of the servers is the MSFC, all traffic sent from server to client via the gateway will go accross the CSM and therefore it will be intercepted.
However, if you want server to server communication through the VIP, you still need source nating as the traffic from server to server in the same subnet will not require the use of the gateway and will therefore still bypass the CSM.
Regards,
gilles.
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