Avaya P460 manual LAG Configuration, LAG Overview, Configuring LAGs

Chapter 4 Avaya P460 Layer 2 Features

LAG Configuration

LAG Overview

A LAG uses multiple ports to create a high bandwidth connection with another device. For example, assigning four 100BASE-T ports to a LAG on an M4648ML-T I/O module, allows the module to communicate at an effective rate of 400 Mbps with another switch.

LAGs provide a cost-effective method for creating a high bandwidth connection. LAGs also provide built-in redundancy for the ports that belong to a LAG. If a port in a LAG fails, another port in the LAG handles its traffic .

To create a LAG, you must select a base port. The behavior of the LAG is derived from the base port. The attributes of the base port, such as port speed, VLAN number, etc., are applied to the other ports in the LAG.

When created, each LAG is automatically assigned a logical port number. You can then use this logical port number for all configuration required for the LAG, such as Spanning Tree, Redundancy, and so on.

Configuring LAGs

You can only create LAGs by combining the same port types on the same I/O Module.

Table 3.1 summarizes possible LAG configurations:

Table 4.1	Possible LAG Configurations
Module		Maximum	Base port	Additional ports	Logical port
		number of	is...	must be...	numbers
		LAGs
M4648ML-T		6	10/100	10/100 Mbps	101-103
			Mbps	Part of the same	(ports 1-24)
				group of 24 ports	104-106
				(1-24; 25-28)	(ports 25-48)
M4648ML-T-2G		6	10/100	10/100 Mbps	101-103
			Mbps	Part of the same	(ports 1-24)
				group of 24 ports	104-106
				(1-24; 25-28)	(ports 25-48)
		1	GBIC	GBIC	107
				On same the
				module

28 Avaya P460 Configuration Guide