system-mac mac-address mac-addressTo explicitly configure the default MAC address for the domain by entering a new MAC address, use thesystem-mac command. The format is aaaa.bbbb.cccc.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 MACaddress 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) toeach peer switch.VLT DOMAIN CONFIGURATION modeunit-id {0 | 1}The unit IDs are used for internal system operations.To explicitly configure the default values on each peer switch, use the unit-id command.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 assignedto each peer switch when one peer switch reboots.8 Configure enhanced VLT. Configure the port channel to be used for the VLT interconnect on a VLTswitch and enter interface configuration mode.CONFIGURATION modeinterface port-channel id-numberEnter the same port-channel number configured with the peer-link port-channel command in theEnabling VLT and Creating a VLT Domain.9 Place the interface in Layer 2 mode.INTERFACE PORT-CHANNEL modeswitchport10 Associate the port channel to the corresponding port channel in the VLT peer for the VLT connection toan attached device.INTERFACE PORT-CHANNEL modevlt-peer-lag port-channel id-numberValid port-channel ID numbers are from 1 to 128.11 Ensure that the port channel is active.INTERFACE PORT-CHANNEL modeno shutdown12 Add links to the eVLT port. Configure a range of interfaces to bulk configure.CONFIGURATION modeinterface range {port-channel id}13 Enable LACP on the LAN port.Virtual Link Trunking (VLT) 1188
