Reference Guide

928 | Virtual Link Trunking (VLT)
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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
2 Remove an IP address from the interface.
no ip address
INTERFACE
PORT-CHANNEL
3 Place the interface in Layer 2 mode.
switchport
INTERFACE
PORT-CHANNEL
4 Add one or more port interfaces to the port channel.
interface specifies one of the following interface types:
1-Gigabit Ethernet: Enter gigabitethernet slot/port.
10-Gigabit Ethernet: Enter tengigabitethernet slot/port.
channel-member interface INTERFACE
PORT-CHANNEL
5 Ensure that the port channel is active.
no shutdown
INTERFACE
PORT-CHANNEL
6 Associate the port channel to the corresponding port
channel in the VLT peer for the VLT connection to an
attached device.
Valid port-channel ID numbers are from 1 to 128.
vlt-peer-lag port-channel
id-number
INTERFACE
PORT-CHANNEL
7 Repeat Steps 1 to 6 on the VLT peer switch to configure the same port channel as part of the VLT domain.
8 On an attached switch or server: Configure a port channel to connect to the VLT domain and add port channels
to it. Figure 49-12 shows how to verify the port-channel configuration.
(Optional) Reconfigure default VLT settings
Step Task Command Syntax Command Mode