HHTP Requests not getting through

I'd suggest you only enable the forwarding VIP on the servers' VLAN. Else, you're basically opening LTM up to be a hub with the forwarding VIP.

 

 

Are you having issues with traffic to the main VIP you're using to load balance the IIS servers? If so, can you run a tcpdump on LTM checking on the client and serverside VLANs to see if the response comes back to LTM and LTM sends the response back to the external client? You can use a command like this to filter for the client and server addresses on all switch ports:

 

 

tcpdump -ni 0.0 -s0 "host CLIENT_IP and (host VIP_IP or host SERVER_IP_1 or host SERVER_IP_2)"

 

 

Also, as long as you have auto lasthop enabled (which it is by default), LTM should send the response back to the same MAC address/VLAN as the request was received from.

 

 

Aaron