Users Guide

Version Description
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
VLT, are not brought up until the VLT domain is recognized on the access device.
During boot-up in a stacking configuration, the system must be able to reach the
DHCP server with the boot image and configuration image. To receive an offer on
static LAGs between switches, only untagged DHCP requests are sent to the DHCP
server. Configure the DHCP server to start in BMP mode.
If the switches are connected using LACP port-channels (for example, the VLT peer and
top of rack [ToR]), use the port-channel option on the ToR-side configuration to
allow member ports of an ungrouped LACP port-channel to inherit VLAN membership
of that port channel. This ensures untagged VLT peer device packets reach the DHCP
server on the ToR.
To ungroup the VLT and port-channel configurations, use the no lacp ungroup
member independent command on a VLT port channel.
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
To retain synced multicast routes or synced multicast outgoing interface (OIF) after a VLT peer node failure,
configure the timeout value for a VLT node.
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-specific. For command information about other platforms, see
the relevant Dell Networking OS Command Line Reference Guide.
Virtual Link Trunking (VLT) 2066