CSS - Can a real server be several Layer-3 hops away from the VIP

Can a CSS11500 load balance and health check real servers that are several Layer-3 hops away from the VIP on the CSS. All documentation and examples always show the servers connected to the CSS as Layer-2
If yes are there any limitations using a CSS in this mode

Hi Bob,
from my point of view there are only some rules to be watched but it should be possible to do. One thing that MUST be: The outgoing interface towards the realserver MUST be used for the traffic that returns from the server afaik because of the CSS has to watch the flows. (can be easily done if u use a trunk as there is for the CSS afaik no difference if the traffic leaves on VLAN x and returns on VLANy unless both VLANs do connect on the same port).
The next thing that is a MUST is:
Routing has to ensure that the CSS is in the flow back from the servers and not bypassed. OR you have to do source-natting so that the server is thinking that the CSS is asking him something.
Regarding the monitoring there is no difference if you are using keepalive scripts for monitoring the service.
Hope that helps and answers your question...
Kind Regards,
Joerg

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