Lucent Technologies P550 - Manual (Page 247)

Cajun P550/P220 Switch Operation Guide 15 -1
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