Users Guide

To disable VLT, use the no vlt domain command.
NOTE: Do not use MAC addresses such as “reserved” or “multicast.”
2. Configure the IP address of the management interface on the remote VLT peer to be used as the
endpoint of the VLT backup link for sending out-of-band hello messages.
VLT DOMAIN CONFIGURATION mode
back-up destination {ipv4–address] | ipv6 ipv6–address [interval seconds]}
You can optionally specify the time interval used to send hello messages. The range is from 1 to 5
seconds.
3. Configure the port channel to be used as the VLT interconnect between VLT peers in the domain.
VLT DOMAIN CONFIGURATION mode
peer-link port-channel id-number
4. (Optional) After you configure a VLT domain on each peer switch and connect (cable) the two VLT
peers on each side of the VLT interconnect, the system elects a primary and secondary VLT peer
device (see
Primary and Secondary VLT Peers). To configure the primary and secondary roles before
the election process, use the primary-priority command. Enter a lower value on the primary
peer and a higher value on the secondary peer.
VLT DOMAIN CONFIGURATION mode
primary-priority value
The priority values are from 1 to 65535. The default is 32768.
If the primary peer fails, the secondary peer (with the higher priority) takes the primary role. If the
primary peer (with the lower priority) later comes back online, it is assigned the secondary role (there
is no preemption).
5. (Optional) Enabled BMP booting of a TOR device through VLT nodes.
CONFIGURATION mode
lacp ungroup member-independent {vlt | port-channel port-channel-id}
NOTE: You must enable RSTP when you use this feature.
6. Repeat Steps 1 to 4 on the VLT peer switch to configure the IP address of this switch as the endpoint
of the VLT backup link and to configure the same port channel for the VLT interconnect.
Configuring a VLT Backup Link
To configure a VLT backup link, use the following command.
1. Specify the management interface to be used for the backup link through an out-of-band
management network.
CONFIGURATION mode
interface managementethernet slot/ port
Virtual Link Trunking (VLT)
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