VLT peer routing enables optimized routing where packets destined for the Layer 3 endpoint of the VLT peer are locally routed. VLT supports unicast routing of both IPv4 and IPv6 traffic.
To enable VLT unicast routing, both VLT peers must be in Layer 3 mode. The VLAN configuration must be symmetrical on both peers. Users cannot configure the same VLAN as Layer 2 on the first node and as Layer 3 on the other node.
IPv4 routing provides forwarding of packets to a destination IP address, based on a routing table. This routing table defines how packets are routed (dynamically, broadcasted directly, or using proxy ARP), and what type of information is included with the packets.
Peer routing is not restricted to a VLAN with routing protocols. Instead, it is enabled domain wide. Peer routing ensures active/active routing for the traffic path. To route traffic on behalf of other VLT peers, enable peer routing on both nodes. Peer routing synchronizes the router MAC address (local destination MAC address) within the VLT domain and ensures seamless routing by the peer node.