Reference Guide

Virtual Link Trunking (VLT) | 1003
5. Connect the peer switches in a VLT domain to an attached access device (switch or server).
Configure a VLT interconnect
Step Task Command Syntax Command Mode
1 Configure the port channel to be used for the VLT
interconnect on a VLT switch and enter interface
configuration mode.
Enter the same port-channel number configured with the
peer-link port-channel command in the Enable VLT
and Create a VLT Domain steps.
interface port-channel
id-number
CONFIGURATION
Note: To be included in the VLTi, the port channel must be in default mode (no switchport or VLAN
assigned).
2 Remove an IP address from the interface.
no ip address
INTERFACE
PORT-CHANNEL
3 Add one or more port interfaces to the port channel.
interface specifies one of the following interface types:
1-Gigabit Ethernet: Enter
gigabitethernet slot/port.
10-Gigabit Ethernet: Enter tengigabitethernet slot/port.
channel-member interface
INTERFACE
PORT-CHANNEL
4 Ensure that the port channel is active.
no shutdown
INTERFACE
PORT-CHANNEL
5 Repeat Steps 1 to 4 on the VLT peer switch to configure the VLT interconnect.
Enable VLT and Create a VLT Domain
Step Task Command Syntax Command Mode
1 Enable VLT on a switch, then configure a VLT domain
and enter VLT-domain configuration mode.
Range of domain IDs: 1 to 1000.
You must configure the same domain ID on the peer
switch to allow for common peering. VLT uses the
domain ID to automatically create a VLT MAC address
for the domain. If the system is not configured
explicitly, the system mac-address of the primary will be
the VLT MAC address for the domain.
To disable VLT, enter the no vlt domain command.
vlt domain domain-id
CONFIGURATION
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.
You can optionally specify the time interval used to
send hello messages. Range: 1 to 5 seconds.
back-up destination
ip-address [interval seconds]
VLT DOMAIN
CONFIGURATION