Member Server communcation to VIP

Are all the pool members in the same VLAN? If so, you'll need to use SNAT otherwise the pool members will reply to each other without going through LTM so you'll be "out-of-state."

SNAT is on and yes all the pool members are in the same VLAN

What are you using for SNAT? AutoMap or a SNAT Pool? After telnetting, can you do a GET and see if you get a reply? If you're using an HTTP Profile on the VIP, LTM won't make a connection to the pool member until you've done that so simply telnetting isn't a perfect representation.

Chris makes a good point: be sure and use a valid request with your telnet sessions. You're dead right that the connection is established to the VIP (3 way handshake). What happens next is that the BigIP is waiting for a set of complete HTTP headers to parse, then it'll forward the request on. So in case you've not done so, be sure and type something like:

 

 

telnet foo.com 80

 

GET /index.html HTTP/1.1

 

Host:

 

Connection: close

 

 

...followed by two enter key hits to complete the HTTP request properly.

 

 

Then see what you find on the server side. You should see the request come into the logs. If not, you'll need to start tcpdump-ing to figure out where the traffic is going.

 

-Matt