Bug ID 1621269: TMM restart loop when attaching large number of interfaces.

Last Modified: Jun 28, 2025

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

Known Affected Versions:
17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2

Fixed In:
17.5.1

Opened: Jul 29, 2024

Severity: 3-Major

Symptoms

TMM is unable to finish initialization when attaching 9 or more Intel 710/E810 SR-IOV interfaces.

Impact

BIG-IP is unable to go into the Active state because TMM restart loop is present.

Conditions

-- Using 9 or more Intel 710/E810 SR-IOV VFs

Workaround

Update Mcpd.KeepAliveCount DB variable to 127 and reboot the BIG-IP.

Fix Information

DB variable Mcpd.KeepAliveCount was introduced to keep network connections between TMOS proccesses alive longer. Therefore, TMM would have enough time to finish initializing when attaching 9 or more Intel 710/E810 SR-IOV interfaces.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips