Administrator Guide

Version Description
9.0.0.0 Introduced on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.8.0 Introduced on the S4810.
Usage Information
When you create a VLT domain on a switch, Dell Networking OS automatically creates a VLT-system MAC
address used for internal system operations.
To reconfigure the default MAC address for the domain by entering a new MAC address in the format
nn:nn:nn:nn:nn:nn, use the system-mac command.
You must also reconfigure the same MAC address on the VLT peer switch.
unit-id
Explicitly configure the default unit ID of a VLT peer switch.
C9000 Series
Syntax
unit-id [0 | 1]
Parameters
0 | 1 Configure the default unit ID of a VLT peer switch. Enter 0 for the first peer or enter 1 for
the second peer.
Defaults Automatically assigned based on the MAC address of each VLT peer. The peer with the lower MAC address is
assigned unit 0; the peer with the higher MAC address is assigned unit 1.
Command Modes VLT DOMAIN
Command History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.5(0.1) Introduced on the Z9500.
9.2(0.0) Introduced on the M I/O Aggregator. This command is supported in Programmable-Mux
(PMUX) mode only.
9.0.2.0 Introduced on the S6000.
9.0.0.0 Introduced on the Z9000.
8.3.19.0 Introduced on the S4820T.
8.3.8.0 Introduced on the S4810.
Usage Information
When you create a VLT domain on a switch, Dell Networking OS 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 unit ID of a VLT peer. Configure a different unit ID (0 or 1) on each peer switch.
To minimize the time required for the VLT system to determine the unit ID assigned to each peer switch when one
peer reboots, use this command.
1618 Virtual Link Trunking (VLT)