Users Guide

The following is a list of the Dell Networking OS version history for this command.
Version Description
9.7(0.0) Introduced on the S6000-ON.
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.
8.3.12.0 Added port-channel parameter on the S4810.
8.3.8.0 Introduced on the S4810.
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.
On the S4810, during boot-up in a stacking conguration, the system must be able to reach the DHCP
server with the boot image and conguration image. During boot-up, only untagged DHCP requests are sent
to the DHCP server to receive an oer on static LAGs between switches. The DHCP server must be
congured to start in BMP mode. If switches are connected using LACP port-channels like the VLT peer and
Top of Rack (ToR), use the port-channel parameter on the ToR-side conguration to allow member ports of
an ungrouped LACP port-channel to inherit vlan membership of that port channel to ensure untagged
packets that are sent by a VLT peer device reach the DHCP server located on the ToR.
To ungroup the VLT and port-channel congurations, 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
multicast peer-routing timeout
Congure the time for a VLT node to retain synced multicast routes or synced multicast outgoing interface (OIF) after a VLT peer
node failure.
Syntax
multicast peer-routing timeout value
To restore the default value, use the no multicast peer-routing timeout command.
Parameters
value Enter the timeout value in seconds. The range is from 1 to 1200. The default is 150.
Command Modes VLT DOMAIN (conf-vlt-domain)
Command History
This guide is platform-specic. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
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Virtual Link Trunking (VLT)