F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

Forum Discussion

JCMATTOS_41723's avatar
JCMATTOS_41723
Icon for Nimbostratus rankNimbostratus
Aug 24, 2009

Action down on service "Reselect"?

We have an LTM 8400 with 9.4.3 and we are testing out a new setting on action down on service "Reselect" and notice that concurrent active connections do not switchover to the active pool member (In d...
config
design
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Aug 25, 2009
Hi JC,

 

 

As a matter I'd suggest upgrading to 9.4.7 with the latest hotfix. There is a known issue in 9.4.3 and lower where this functionality may fail. The issue is described in SOL8160:

 

 

SOL8160: The BIG-IP LTM does not choose another pool member when the Action on Service Down setting is set to Reselect and the target pool member becomes unavailable

 

https://support.f5.com/kb/en-us/solutions/public/8000/100/sol8160.html

 

 

If after upgrading, the reselect on service down still doesn't work to reselect a new pool member for all existing TCP connections, I'd suggest capturing tcpdumps and ltm log files and opening a case with F5 Support.

 

 

Aaron