VLACP

Virtual Link Aggregation Control Protocol:

• Extension to LACP, used to detect end-to-end failures
• Sends point-to-point hello packets and provides failure detection across any L2 domain, when hello packets are not received, link state is brought down
• Timers can be reduced and one second failure detection and switchover can be achieved
• Only works for Point-to-point applications, will not work for port-to-multiport (no guarantee for point-point match)
• Used with MLT/SMLT to provide quick failure detection capability
• Does not provide link aggregation, independent of LACP
• Configuration must have same EtherType, multicast MAC address, and timers
• Not typically used with LACP