LTM 11.X iRule Errors missing in /var/log/ltm

In this case it isn't an ideal situation. We have old hardware at 9.4.8 which doesn't support some of the 10.x versions and we are migrating to new hardware that came preloded with a 10.x version our hw didnt support (now updated to 11.2).

 

 

The decision was to go directly from the 9.4.8 to 11.2 without perfoming the upgrades inbetween because. This was because the 10.x systems utilized raided discks and F5 support said that there may be a possibility of losing that performance gain when going through the downgrade to 9.4 then upgrading to 11.

 

 

Chances are the upgrade process would have caught the problems. These specific errors from when I did dev was when in an irule matchclass was used to check against a data group. The 11.x web based irule editor accepted the irules however when traffic came through the irules broke without outputing any details to ltm log.