How do I insert LB's IP with an irule?

I still can't get the Big IP's IP address to be passed on.

 

 

I can get 3 of the 4 IP's involved: client's IP, Server Internal IP and Server External IP, but no matter what I try, I can't for the life of me get the Big IP's IP.

 

 

The only time I've ever managed to get it was when we were using the Performance profile, which we found gave an inaccuarate value for REMOTE_ADDR. But in the normal HTTP setting nothing I try will let me see this value. Here's the variation on Joe's code which I've tried, which returns the same 3 IPs but not the one I need:

 

 

when HTTP_REQUEST {
  set bigip_addr1 [IP::local_addr]
  set bigip_addr2 [IP::remote_addr]
  set bigip_addr3 [IP::client_addr]
}
when HTTP_REQUEST_SEND {
  set serverip_addr1 [IP::server_addr]
  set remoteip_addr2 [IP::remote_addr]
  set clientip_addr3 [IP::client_addr]
  clientside {
    HTTP::header insert "Client-Addr" [IP::client_addr]
    HTTP::header insert "Server-Addr" [IP::server_addr]
    HTTP::header insert "Node-Addr" [IP::remote_addr]
    HTTP::header insert "Local-Addr" [IP::local_addr]
    HTTP::header insert "BIGIP-Server-Addr" $serverip_addr1
    HTTP::header insert "BIGIP-Remote-Addr" $remoteip_addr2
    HTTP::header insert "BIGIP-client-Addr" $clientip_addr3
    HTTP::header insert "BIGIP1" $bigip_addr1
    HTTP::header insert "BIGIP2" $bigip_addr2
    HTTP::header insert "BIGIP3" $bigip_addr3
  }
}

 

 

Any other suggestions?