Chapter 15 - Managing Intelligent Multicasting (Layer 2 & Layer 3); Overview; Introduction - Lucent Technologies Cajun P220 Operation Manual

15
Managing Intelligent
Multicasting (Layer 2 & Layer 3)

Overview

This chapter and its procedures address both Layer 2 and Layer 3 configurations.
Included in this chapter:

Introduction

Configuring Global Intelligent Multicasting
Displaying Router Ports
Configuring Static Router Ports
Searching for Intelligent Multicast Sessions
Creating a Static Multicast Session
Configuring IGMP Snooping (Layer 3 only)
Configuring the LGMP Server
Configuring/Viewing an LGMP Client
Configuring/Viewing CGMP Snooping
Introduction
Intelligent multicasting refers to the forwarding of Layer 2 multicast traffic (packets with
a multicast destination MAC address) to a subset of ports participating in a VLAN. With
intelligent multicasting disabled, Layer 2 multicast traffic is flooded to all ports
participating in the VLAN on which the traffic is received.
Intelligent multicasting is used to limit the forwarding of Layer 2 multicast traffic to only
those ports within the VLAN that have clients attached to them that want to receive this
multicast traffic. Limiting this forwarding reduces the amount of traffic to ports that do
not have clients wanting to receive the multicast traffic.
A multicast session is Layer 2 multicast traffic within a VLAN. The switch supports 60
sessions per VLAN. A client port is a port with an attached host configured to receive (be
Cajun P550/P220 Switch Operation Guide 15-1