Bug ID 876801: Tmm crash: invalid route type

Last Modified: Sep 13, 2023

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

Known Affected Versions:
13.1.3,,,,,,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1

Fixed In:
16.0.0, 15.1.2, 14.1.4, 13.1.4

Opened: Feb 04, 2020

Severity: 2-Critical


Tmm crashes. /var/log/tmm contains the log entries: tmm1: notice panic: invalid route type tmm1: notice ** SIGFPE **


TMM crashes. Traffic disrupted while tmm restarts.


The issue is intermittent. 1. There is more than one route domain in the parent-child relationship. 2. There are routing entries for the parent route-domain good enough to be selected as an egress point for the routing object (for instance, pool member) which is from child route domain. 3. The routing entry from a parent route domain is selected as an egress point for the object from the child route domain. 4. A new routing entry for child route domain is added.


There is no way to workaround a problem, but there is a safe way to add and delete routes without putting a BIG-IP into a state where it could encounter this issue. Safe way to add/delete a route. 1) Add routes to child route domains first, then to parent route domain. 2) Delete routes from parent route domain first, then from child route domain.

Fix Information

Routing objects are now forced to reselect a routing entry after a new route is added to the child route domain's routing table and it's not causing a TMM crash anymore.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips