Piotr_Lewandows
May 29, 2017Altostratus
iRule TCL Error and Fallback Host
Hi,
Just another finding that surprised me a bit :-)
Scenario:
- HTTP profile with Fallback Host set (Fallback on Error Codes can be empty or contain codes)
- Single member pool
- iRule causing TCL error
I was under impression that Fallback Host is used under two conditions:
- Member returned one of codes defined in Fallback on Error Codes
- There is no active member left in the pool
It turns out that Fallback Host is as well used when iRule TCL Error is generated - instead of sending RST to client. Then BIG-IP sends FIN-ACK to client to close connection.
Piotr