Reference Guide

302 | Virtual Link Trunking (VLT)
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2 (Optional) After you configure the VLT domain on each
peer switch on both sides of the interconnect trunk, by
default, the FTOS software elects a primary and
secondary VLT peer device.
Use the
primary-priority command to reconfigure the
primary role of VLT peer switches. To configure the
primary role on a VLT peer, enter a lower
value than the
priority value of the remote peer.
Priority values are from 1 to 65535. Default: 32768.
primary-priority value VLT DOMAIN
CONFIGURATION
3 (Optional) When you create a VLT domain on a switch,
the FTOS software automatically creates a VLT-system
MAC address used for internal system operations.
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.
system-mac mac-address
mac-address
VLT DOMAIN
CONFIGURATION
4 (Optional) When you create a VLT domain on a switch,
the FTOS software automatically assigns a unique unit
ID (0 or 1) to each peer switch. The unit IDs are used for
internal system operations.
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.
unit-id {0 | 1}
VLT DOMAIN
CONFIGURATION
Connect a VLT domain to an attached access device (switch or server)
Step Task Command Syntax Command Mode
On a VLT peer switch: Configure the same port channel ID number on each peer switch in the VLT domain to
connect to an attached device as follows:
1 Configure the same port channel to be used to connect to
an attached device and enter interface configuration
mode.
interface port-channel
id-number
CONFIGURATION
(Optional) Reconfigure default VLT settings
Step Task Command Syntax Command Mode