Chapter 77 Configuring Igmp Snooping And Multicast; Configuring Igmp Snooping (Cli Procedure) - Juniper JUNOS OS 10.3 - SOFTWARE Manual

CHAPTER 77
Configuring IGMP Snooping and Multicast

Configuring IGMP Snooping (CLI Procedure)

Copyright © 2010, Juniper Networks, Inc.
Configuring IGMP Snooping (CLI Procedure) on page 2331
Configuring IGMP Snooping (J-Web Procedure) on page 2332
Changing the IGMP Snooping Group Query Membership Timeout Value (CLI
Procedure) on page 2335
Configuring Multicast VLAN Registration (CLI Procedure) on page 2336
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.
You can 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.
NOTE: You cannot configure IGMP snooping on a secondary VLAN.
To enable IGMP snooping and configure individual options as needed for your network
by using the CLI:
Enable IGMP snooping on a VLAN:
1.
[edit protocols]
user@switch# set igmp-snooping vlan employee-vlan
Configure the limit for the number of multicast groups allowed on the
2.
interface to 50.
[edit protocols]
user@switch# set igmp-snooping vlan employee-vlan interface ge-0/0/1 group-limit
50
ge-0/0/1
2331