• Author : Chengle(Gary) Zhang

 
 

MLAG Dual Primary Detection and Release Updates

Description When the MLAG peer-link goes down, the secondary peer assumes the primary peer is down/dead, and takes over the primary role. It is possible that when peer-link is down, the primary isn’t actually down/dead and both MLAG peers think they are the primary. This is called “dual-primary” condition/state. In this state, each peer will run Layer-2 protocols such as Spanning Tree Protocol independently. Depending on the topology, this can cause loops in the network. This can also impact the IGMP snooping feature. The Dual Primary Detection feature uses the management interface as an out-of-band connection between the two peers...
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