Packet with source IP

Unanswered Question
Oct 1st, 2008


is possible that a css11503, configured as http and https load balancer, sends packet with source IP!

With an IDS, I can see packet with source IP, coming from the load balancer, but I cannot understand why.

Can someone help me?!

Best Regards


I have this problem too.
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Gilles Dufour Wed, 10/01/2008 - 09:11

CSCek50736 The CSS is configured with an L5 VIP. The client sends a SYN to the VIP. The CSS responds with a SYN/ACK to the client. The SYN/ACK is returned as an ICMP unreachable to the VIP by a router unable to locate the client. This could cause the CSS to forward the ICMP unreachable with a src and dst ip of

You'll need a sniffer trace to identify the traffic.



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