Juniper JUNOS OS 10.3 - SOFTWARE, Manual

Page: 2419 / 3946

CHAPTER 76
Examples: IGMP Snooping and Multicast
Configuration
• Example: Configuring IGMP Snooping on EX Series Switches on page 2323
• Example: Configuring Multicast VLAN Registration on EX Series Switches on page 2326
Example: Configuring IGMP Snooping on EX Series Switches
IGMP snooping regulates multicast traffic in a switched network. With IGMP snooping
enabled, a LAN switch monitors the IGMP transmissions between a host (a network
device) and a multicast router, keeping track of the multicast groups and associated
member ports. The switch uses that information to make intelligent multicast-forwarding
decisions and forward traffic to the intended destination interfaces.
Configure IGMP snooping on one or more VLANs to allow the switch to examine IGMP
packets and make forwarding decisions based on packet content. By default, IGMP
snooping is enabled on EX Series switches.
This example describes how to configure IGMP snooping:
• Requirements on page 2323
• Overview and Topology on page 2324
•
Configuration on page 2324
Requirements
This example uses the following software and hardware components:
•
One EX3200-24T switch
•
Junos OS Release 9.5 or later for EX Series switches
Before you configure IGMP snooping, be sure you have:
•
Configured the
employee-vlan
VLAN on the switch
•
Assigned interfaces
ge-0/0/1
,
ge-0/0/2
, and
ge-0/0/3
to
employee-vlan
See “Example: Setting Up Bridging with Multiple VLANs for EX Series Switches” on
page 1312.
2323 Copyright © 2010, Juniper Networks, Inc.