Bug ID 523995: IPv4 link-local addresses can cause TMM crash when used in conjunction with ECMP routes

Last Modified: Sep 13, 2023

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

Known Affected Versions:
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

Opened: May 19, 2015

Severity: 2-Critical


TMM can crash and ECMP routes via IPv4 link-local addresses may not work correctly.


Traffic disrupted while tmm restarts.


This happens only for specific IP range with dynamic routing and multiple next hops.


Avoid using 169.254 prefix.

Fix Information

ECMP routes are working correctly and TMM does not crash

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips