Bug ID 744516: TMM panics after a large number of LSN remote picks

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP CGN(all modules)

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 13.1.0,,,,,,,,, 13.1.1,,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,

Fixed In:
15.0.0,,, 12.1.4

Opened: Sep 19, 2018

Severity: 2-Critical


TMM panics with the assertion 'nexthop ref valid' failed. This occurs after a large number of remote picks cause the nexthop reference count to overflow.


TMM restarts. Traffic is interrupted.


An LSN Pool and remote picks. Remote picks occur when the local TMM does not have any addresses or port blocks available. Remote picks are more likely when inbound and hairpin connections are enabled.


There is no workaround.

Fix Information

TMM no longer panics regardless of the number of remote picks.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips