Bug ID 755976: ZebOS might miss kernel routes after mcpd deamon restart

Last Modified: Aug 08, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,,, 13.1.3, 14.0.0,,,,,, 14.1.0,,,,,,, 15.0.0, 15.0.1

Opened: Jan 18, 2019
Severity: 3-Major


After an mcpd daemon restart, sometimes (in ~30% of cases) ZebOS is missing some of kernel routes (virtual addresses). One of the most common scenario is a device reboot.


The kernel route (virtual address) is not added to the ZebOS routing table and cannot be advertised.


-- Dynamic routing is configured. -- Virtual address is created and Route Advertisement is configured: imish -e 'sh ip route kernel' -- mcpd daemon is restarted or device is rebooted.


There are several workarounds; here are two: -- Restart the tmrouted daemon: bigstart restart tmrouted -- Recreate the affected virtual address.

Fix Information


Behavior Change