Administrator Guide

VLT DOMAIN CONFIGURATION mode
system-mac mac-address mac-address
Use the system-mac command to explicitly configure the default MAC address for the domain by
entering a new MAC address in the format: aaaa.bbbb.cccc.
You must also reconfigure the same MAC address on the VLT peer switch.
Use this command to minimize the time required for the VLT system to synchronize the default MAC
address of the VLT domain on both peer switches when one peer switch reboots.
7 When you create a VLT domain on a switch, the system automatically assigns a unique unit ID (0 or 1) to
each peer switch. The unit IDs are used for internal system operations.
VLT DOMAIN CONFIGURATION mode
unit-id {0 | 1}
Use the unit-id command to explicitly configure the default values on each peer switch.
You must configure a different unit ID (0 or 1) on each peer switch.
Use this command to minimize the time required for the VLT system to determine the unit ID assigned
to each peer switch when one peer switch reboots.
8 Configure multi-domain VLT. Configure the port channel to be used for the VLT interconnect on a VLT
switch and enter interface configuration mode.
CONFIGURATION mode
interface port-channel id-number
Enter the same port-channel number configured with the peer-link port-channel command.
9 Place the interface in Layer 2 mode.
INTERFACE PORT-CHANNEL mode
switchport
10 Associate the port channel to the corresponding port channel in the VLT peer for the VLT connection to
an attached device.
INTERFACE PORT-CHANNEL mode
vlt-peer-lag port-channel id-number
Valid port-channel ID numbers are from 1 to 128.
11 Ensure that the port channel is active.
INTERFACE PORT-CHANNEL mode
no shutdown
12 Add links to the mVLT port. Configure a range of interfaces to bulk configure.
CONFIGURATION mode
interface range {port-channel id}
13 Enable LACP on the LAN port.
Virtual Link Trunking (VLT) 971