Connectivity Guide

3 Repeat the steps on the VLT peer.
Congure VLT LAG — peer 1
OS10(config)# interface port-channel 10
OS10(conf-if-po-10)# vlt-port-channel 1
Congure VLT LAG — peer 2
OS10(config)# interface port-channel 20
OS10(conf-if-po-20)# vlt-port-channel 1
VLT unicast routing
VLT unicast routing enables optimized routing where packets destined for the L3 endpoint of the VLT peer are locally routed. IPv4 and IPv6
support VLT unicast routing.
To enable VLT unicast routing, both VLT peers must be in L3 mode. The VLAN conguration must be symmetrical on both peers. You
cannot congure the same VLAN as L2 on one node and as L3 on the other node.
1 Enter the VLT domain ID in CONFIGURATION mode, from 1 to 1024.
vlt-domain domain-id
2 Enable peer-routing in VLT-DOMAIN mode.
peer-routing
3 Repeat the steps on the VLT peer.
Congure unicast routing — peer 1
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# peer-routing
View unicast routing — peer 1
do show running-configuration vlt
!
vlt-domain 1
discovery-interface ethernet1/1/3-1/1/6,1/1/53:1-1/1/53:4,1/1/54:1-1/1/54:4
peer-routing
Congure unicast routing — peer 2
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# peer-routing
View unicast routing — peer 2
do show running-configuration vlt
!
vlt-domain 1
discovery-interface ethernet1/1/3-1/1/6,1/1/53:1-1/1/53:4,1/1/54:1-1/1/54:4
peer-routing
VRRP Optimized Forwarding
To enable optimized L3 forwarding over VLT, use VRRP Active-Active mode. By default, VRRP Active-Active mode is enabled on the VLAN
interfaces. In this mode, each peer locally forwards L3 trac, resulting in reduced trac ow over the VLTi. Congure the same static and
dynamic L3 routing on each peer to ensure that L3 reachability and routing tables are the same on both peers.
1 Enable VRRP Active-Active mode in VLAN-INTERFACE mode.
vrrp mode active-active
2 Congure VRRP on the L3 VLAN that spans both peers.
1050
Virtual Link Trunking