For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

Alan_Sha's avatar
Alan_Sha
Icon for Nimbostratus rankNimbostratus
Oct 31, 2005

How to keep the client connection when LB_FAILED?

Hi,     I need some help on the following scenario.     I have been maintaining a persistent TCP connection between a client application and Big IP. The client application is sending requ...
application delivery
dev
devops
iRules
unRuleY_95363's avatar
unRuleY_95363
Historic F5 Account
Nov 11, 2005
I'm still trying to figure out the best way to handle this. One crazy approach would be to attach to the localhost discard port and let the transaction be dumped into that. So, something like this:

when LB_FAILED {
   set connRetry [expr {$connRetry + 1}] 
   if { $connRetry < $maxAttempts } {
      log local0.error "Conn. to [IP::server_addr] failed. Retrying..." 
      LB::reselect
   } else {
      log local0.error "Max. re-conn. attempts exhausted. Transaction dropped." 
      node 127.0.0.1 9
   }
}
when SERVER_CONNECTED {
   if { $connRetry >= $maxAttempts } {
      clientside {TCP::respond "$::STX$::ETX"}
      LB::detach
   }
}