MC-LAG: Configuration support to improve Layer 2 and Layer 3 convergence

You can configure multichassis link aggregation (MC-LAG) interfaces to improve Layer 2 and Layer 3 convergence time when a multichassis aggregated Ethernet link goes down or comes up in a bridge domain. To use this feature, ensure that the Inter-Chassis Link (ICL) is configured on an aggregated Ethernet interface. For Layer 2 convergence, configure the enhanced-convergence statement on an aggregated Ethernet interface at the [edit interfaces aex aggregated-ether-options mc-ae] hierarchy level. For Layer 3 convergence, configure the enhanced-convergence statement on an integrated routing and bridging (IRB) interface at the [edit interfaces irb unit unit-number] hierarchy level.