Layer 3 switch clustering and multicast SMLT

Switch clustering is the logical aggregation of two nodes to form one logical entity known as the switch cluster. The two peer nodes in a switch cluster connect using a virtual interswitch trunk (vIST). The vIST exchanges forwarding and routing information between the two peer nodes in the cluster. This section provides guidelines for switch clusters that use multicast and Split Multilink Trunking (SMLT).