Administrator Guide

3. Ensure that the interface is active.
MANAGEMENT INTERFACE mode
no shutdown
4. Configure a VLT backup link using the back-up destination command.
VLT domain mode
back-up destination {ip address ipv4-address/mask | ipv6 address ipv6-address/mask}
Dell(conf-vlt-domain)#back-up destination ?
A.B.C.D IP address for VLT backup link
ipv6 Configure IPv6 address for VLT backup link
IPv4 address (A.B.C.D) or IPv6 address (X:X:X:X::X) of the VLT peer’s management interface.
5. Repeat Steps 1 – 4 on the VLT peer switch.
To set the amount of time, in seconds, to delay the system from restoring the VLT port, use the delay-restore command at any time.
For more information, refer to VLT Port Delayed Restoration.
Configuring a VLT Port Delay Period
To configure a VLT port delay period, use the following commands.
1. Enter VLT-domain configuration mode for a specified VLT domain.
CONFIGURATION mode
vlt domain domain-id
The range of domain IDs from 1 to 1000.
2. Enter an amount of time, in seconds, to delay the restoration of the VLT ports after the system is rebooted.
CONFIGURATION mode
delay-restore delay-restore-time
The range is from 1 to 1200.
The default is 90 seconds.
Reconfiguring the Default VLT Settings (Optional)
To reconfigure the default VLT settings, use the following commands.
1. Enter VLT-domain configuration mode for a specified VLT domain.
CONFIGURATION mode
vlt domain domain-id
The range of domain IDs is from 1 to 1000.
2. (Optional) When you create a VLT domain on a switch, the system automatically creates a VLT-system MAC address used for internal
system operations.
VLT DOMAIN CONFIGURATION mode
system-mac mac-address mac-address
To explicitly configure the default MAC address for the domain by entering a new MAC address, use the system-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 MAC address of the VLT domain on
both peer switches when one peer switch reboots.
3. (Optional) When you create a VLT domain on a switch, the system automatically assigns a unique unit ID (0 or 1) to each peer switch.
VLT DOMAIN CONFIGURATION mode
unit-id {0 | 1}
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.
Unit IDs are used for internal system operations.
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.
Virtual Link Trunking (VLT)
979