Administrator Guide

Command Modes CONFIGURATION
Supported Modes Programmable-Mux (PMUX)
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Supported on the M I/O Aggregator.
Usage
Information
LACP on the VLT ports (on a VLT switch or access device), which are members of the virtual link trunk, is
not brought up until the VLT domain is recognized on the access device.
To ungroup the VLT and port-channel configurations, use the no lacp ungroup member independent
command on a VLT port channel, depending on whether the port channel is VLT or non-VLT.
Example
Dell(conf)#lacp ungroup member-independent ?
port-channel LACP port-channel members become switchports
vlt All VLT LACP members become
switchports
peer-link port-channel
Configure the specified port channel as the chassis interconnect trunk between VLT peers in the domain.
Syntax
peer-link port-channel port-channel-number {peer-down-vlan vlan id}
Parameters
port-channel-
number
Enter the port-channel number that acts as the interconnect trunk.
peer-down-vlan
vlan id
Enter the keyword peer-down-vlan then a VLAN ID to configure the VLAN that
the VLT peer link uses when the VLT peer is down.
Defaults Not configured.
Command Modes VLT DOMAIN
Supported Modes Programmable-Mux (PMUX)
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Supported on the M I/O Aggregator.
Usage
Information
To configure the VLAN from where the VLT peer forwards packets received over the VLTi from an
adjacent VLT peer that is down, use the peer-down-vlan parameter. To ensure that the DHCP discover
packets are forwarded to the VLAN that has the DHCP server, use this configuration.
show vlt backup-link
Displays information on the backup link operation.
Syntax
show vlt backup-link
Default Not configured.
Command Modes EXEC
Supported Modes All Modes
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
308 Virtual Link Trunking (VLT)