Administrator Guide

Delay-Restore Abort Threshold: 60 seconds
Peer-Routing : Enabled
Peer-Routing-Timeout timer: 0 seconds
Multicast peer-routing timeout: 150 seconds
● To verify the VLTi (ICL) link is up in the VLT secondary peer, use show vlt brief command.
VLT_Secondary#show vlt brief
VLT Domain Brief
------------------
Domain ID: 100
Role: Secondary
Role Priority: 32768
ICL Link Status: Up
HeartBeat Status: Up
VLT Peer Status: Up
Version: 6(9)
Local System MAC address: 00:e6:e2:f5:5c:15
Remote System MAC address: f4:8e:38:6a:97:3f
Remote system version: 6(9)
Delay-Restore timer: 90 seconds
Delay-Restore Abort Threshold: 60 seconds
Peer-Routing : Enabled
Peer-Routing-Timeout timer: 0 seconds
Multicast peer-routing timeout: 150 seconds
VXLAN on VLT
VLT peers are two nodes in the network that are loosely coupled. It provides high availability to the other ends. VXLAN on VLT
provides resiliency to the servers connected to southbound port-channels and VTEPS connected through L3 cloud to
northbound interfaces. As gateway IP address configuration on both peers is the same, remote VTEP’s view it as a single node.
Packets from remote VTEP’s can land on any node, either VLT primary or secondary. Southbound interfaces are connected via
port channels. Even if a port-channel member connected to one peer is down, the server can send/receive traffic through the
other VLT peer.
The figure below shows the topology for a data-center interconnect, in which static VXLAN is used for linking geographically
dispersed data centers. VXLAN tunnels are used to communicate across the data centers. VXLAN on VLT provides high
availability to the L3 network and to the servers connected via LAG.
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Virtual Link Trunking (VLT)