Bug ID 663051: BIG-IP trunk goes down after MLAG peer disconnect

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(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, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Opened: May 04, 2017
Severity: 3-Major

Symptoms

When a BIG-IP trunk is connected to an Arista multi-chassis link aggregation (MLAG) pair, the trunk may go completely down if the Arista MLAG peer link is disconnected.

Impact

Entire trunk goes down. Note: This is a race condition that is an issue with the Arista MLAG configuration and not the BIG-IP system behavior. According to Arista, the issue appears to be limited to the Arista 7050 switches.

Conditions

-- BIG-IP system connected to Arista MLAG switch pair. -- Trunk with two or more physical interfaces. -- Interfaces spanning both of the MLAG peers. -- Arista MLAG peer link is disconnected.

Workaround

None.

Fix Information

None

Behavior Change