Posted By hoolio on 02/10/2010 8:35 AM
Hi,
Do you see any errors in the server access logs when the monitors fail? Do you have connection limits set for the pool members or node addresses? Which LTM version are you running?
I added some monitor troubleshooting tips to this page:
http://devcentral.f5.com/wiki/default.aspx/AdvDesignConfig/TroubleshootingLtmMonitors.html
If you see anything that could be added to the page, either add it or reply here with comments.
If the issue only occurs during a (light) load test, it will be fun to pick through the logs and/or tcpdumps to find the problem, but it should still be possible to troubleshoot this.
Thanks,
Aaron
Thanks for the quick reply.
Running version 10.0.0 on build 5514 (HF2) on a BIGIP 1600 LTM.
No connection limit set on the VIP level, pool level, or node level.
I'll take a look at the link you provided as well just to see if I can pick anything out. Logs aren't very conclusive and just show things like:
Wed Feb 10 10:42:47 EST 2010 local/wayne-lc2 notice mcpd[2029] 01070727 Pool member 192.168.201.15:80 monitor status up.
Wed Feb 10 10:42:54 EST 2010 local/wayne-lc2 notice mcpd[2029] 01070638 Pool member 192.168.201.13:80 monitor status down.
Wed Feb 10 10:42:54 EST 2010 local/tmm err tmm[984] 01010028 No members available for pool tilap.80