Last Modified: Apr 24, 2026
Affected Product(s):
BIG-IP LTM
Fixed In:
21.0.0
Opened: Sep 01, 2025 Severity: 1-Blocking
During TMM shutdown, a timeout occurs, causing TMM to produce a core. The timeout is due to TMM taking an extremely long time (more than 10 seconds) to close all the taps due to there being a lot of VLANs and tripping the watchdog.
TMM takes longer to shutdown and restart
-- BIG-IP VE -- A lot (100s or 1000s) of VLANs are in use
Reduce the number of VLANs
Added handling and throttling for when there are a lot of VLANs.