Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP GTM
Known Affected Versions:
11.3.0, 11.4.1
Fixed In:
11.6.0, 11.4.1 HF4, 11.3.0 HF9
Opened: Dec 09, 2013 Severity: 2-Critical Related Article:
K15251
If there is an LTM virtual server with a dot ( . ) in the name that is not in the same route domain as the self-IP address that the GTM uses to connect to the LTM, the virtual server is marked down.
Virtual servers that match these conditions are marked down.
This occurs because the ltm-name field in the GTM configuration includes the folder name, for example, '/Common/vs.name.route.domain', and the LTM virtual server has been rolled back to a software version that did not support folders, so the ltm-name no longer matches. Furthermore, since the virtual server is not in the same route domain, a simple addr/port lookup fails and the virtual server monitor request times out.
Reverting a GTM monitored LTM from 11.x to 10.x, edit the configuration on the GTM and remove '/Common/' from the ltm-name fields of the monitor virtual servers.
The software now attempts to match the name of the LTM 11.x virtual server with a virtual server on a 10.x BIG-IP system, so the virtual servers are not marked down.