Reference Guide

1. Configure a VLT domain and enter VLT-DOMAIN mode. Configure the same VLT domain ID on each peer, from 1 to 255.
vlt-domain domain-id
2. Repeat the steps on the VLT peer to create the VLT domain.
Peer 1
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)#
Peer 2
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)#
VLTi configuration
Before you configure VLTi on peer interfaces, remove each interface from L2 mode with the no switchport command, see
VLT interconnect.
1. Enter the VLT domain ID to enter from CONFIGURATION mode.
vlt-domain domain-id
2. Configure one or a hyphen-separated range of VLT peer interfaces to become a member of the VLTi in INTERFACE mode.
discovery-interface {ethernet node/slot/port[:subport] | ethernet node/slot/
port[:subport] -node/slot/port[:subport]}
3. Repeat the steps on the VLT peer.
Peer 1
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# exit
OS10(config)# interface ethernet 1/1/2
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/2)# exit
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# discovery-interface ethernet1/1/1
OS10(conf-vlt-1)# discovery-interface ethernet1/1/2
Peer 2
OS10(config)# interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)# no switchport
OS10(conf-if-eth1/1/1)# exit
OS10(config)# interface ethernet 1/1/2
OS10(conf-if-eth1/1/2)# no switchport
OS10(conf-if-eth1/1/2)# exit
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# discovery-interface ethernet1/1/1
OS10(conf-vlt-1)# discovery-interface ethernet1/1/2
Configure the VLT MAC address
You can manually configure the VLT MAC address.
Configure the same VLT MAC address on both the VLT peer switches to avoid any unpredictable behavior during a VLT failover.
For example, when a unit is down or when the VLTi is reset. If you do not configure a VLT MAC address, the MAC address of
the primary peer is used as the VLT MAC address across all peers.
Use the vlt-mac mac-address to configure the MAC address in both the VLT peers.
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Virtual Link Trunking