Last Modified: Sep 13, 2023
Affected Product(s):
BIG-IP GTM
Known Affected Versions:
11.3.0, 11.4.0, 11.4.1, 11.6.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2
Fixed In:
12.0.0, 11.6.1, 11.5.4 HF2, 11.4.1 HF10
Opened: Jul 15, 2015 Severity: 2-Critical Related Article:
K05114001
Applying load balance decision logging to the DNS profile can cause TMM to crash when a query is load balanced to a last resort pool that is unavailable.
Traffic disrupted while tmm restarts.
-- DNS logging is enabled and log profile set on the DNS profile. -- A Wide IP is configured with a last resort pool. -- The last resort pool is unavailable. -- A query is load balanced to the last resort pool.
Disable decision logging for the DNS profile, or discontinue use of the last resort pool feature.
DNS decision logging no longer causse TMM to crash when a last resort pool is configured for a Wide IP, that last resort pool is unavailable, and a query is load balanced to that last resort pool.