Connectivity Guide

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 VLT MAC address
You can manually configure the VLT MAC address.
Configure the VLT MAC address symmetrical in both the VLT peer switches to avoid any unpredictable behavior when any unit
is down or when 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. Configuring the MAC address manually enables to minimize the time required to synchronize
the default MAC address of the VLT domain on both peer devices when one peer switch reboots.
Use the vlt-mac mac-address to configure the MAC address in both the VLT peers.
Example configuration:
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# vlt-mac 00:00:00:00:00:02
NOTE: It is recommended to configure the same VLT MAC address manually on both the VLT peer switches.
Delay restore timer
When a VLT node boots up, restoration of VLT port status is deferred for a certain amount of time to enable VLT peers to
complete the control data information exchange.
If the peer VLT device was up at the time the VLTi link failed, the system allows a delay in bringing up of VLT ports after reload
or peer-link restoration between the VLT peer switches..
When both the VLT peers are up and running, and if VLTi fails, the secondary peer brings down the VLT ports. When the VLTi
port comes up, secondary peer does not bring up VLT ports immediately. The VLT ports are brought up only after the VLT port
restoration timer, to allow both the VLT peers to sync up the control information with each other.
By default, the system allows 90 seconds. You can use the delay-restore timer command to modify the duration of the
timer.
Example:
OS10(config)# vlt-domain 1
OS10(conf-vlt-1)# delay-restore 100
VLT backup
VLT backup link is an additional link used to check the availability of the peer nodes in the VLT domain.
When VLTi interface goes down, the backup link helps to differentiate the VLTi link failure from peer node failure. If the VLTi link
fails, all the VLT nodes exchange node liveliness information through the backup link.
Based on the node liveliness information, the VLT LAG/port is in up state in the primary VLT peer and in down state in the
secondary VLT peer. When only the VLTi link fails, but the peer is alive, the secondary VLT peer shuts down the VLT ports.
When the node in primary peer fails, the secondary becomes the primary peer.
Configure the VLT backup link using the backup destination {ip-address | ipv6 ipv6–address} [vrf
management] [interval interval-time]
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Virtual Link Trunking