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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) After you configure the VLT domain on each peer switch on both sides of the interconnect
trunk, by default, the system elects a primary and secondary VLT peer device.
VLT DOMAIN CONFIGURATION mode
primary-priority value
To reconfigure the primary role of VLT peer switches, use the primary-priority command. To
configure the primary role on a VLT peer, enter a lower value than the priority value of the remote
peer.
The priority values are from 1 to 65535. The default is 32768.
3. (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.
4. (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.
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Virtual Link Trunking (VLT)