Last Modified: Dec 19, 2025
Affected Product(s):
BIG-IP DNS, GTM
Known Affected Versions:
17.1.3, 17.5.1.3
Opened: Dec 03, 2025 Severity: 3-Major
GTM topology regions updates do not take effect within tmm
GTM not answering with latest GTM topology region updates.
Modifications made to gtm topology regions do not take effect when only one client is sending queries. Note that this issue is tmm-thread specific, meaning one or more tmm threads can get into this state, as long as DNS queries keep hitting the same tmm thread(s), coming from the same source IP address(es) This is a very unlikely scenario in most production environments, and is likely to only be seen during lab testing with client traffic from one or few IP addresses.
Restart tmm, or perform the DNS lookup from a different client IP address (not the same address that the affected tmm thread previously processed a topology-based DNS query from)
None