Related
Documentation
Understanding IGMP on page 445•
• show pim interfaces
• show igmp statistics
• RFC 2236, Internet Group Management Protocol, Version 2
• RFC 3376, Internet Group Management Protocol, Version 3
Enabling IGMP Static Group Membership
You can create IGMP static group membership to test multicast forwarding without a
receiver host. When you enable IGMP static group membership, data is forwarded to an
interface without that interface receiving membership reports from downstream hosts.
The router on which you enable static IGMP group membership must be the designated
router (DR) for the subnet. Otherwise, traffic does not flow downstream.
When enabling IGMP static group membership, you cannot configure multiple groups
using the group-count, group-increment, source-count, and source-increment statements
if the all option is specified as the IGMP interface.
Class-of-service (CoS) adjustment is not supported with IGMP static group membership.
In this example, you create static group 233.252.0.1.
1. On the DR, configure the static groups to be created by including the static statement
and group statement and specifying which IP multicast address of the group to be
created. When creating groups individually, you must specify a unique address for
each group.
[edit protocols igmp]
user@host# set interface fe-0/1/2 static group 233.252.0.1
2. After you commit the configuration, use the show configuration protocol igmp command
to verify the IGMP protocol configuration.
user@host> show configuration protocol igmp
interface fe-0/1/2.0 {
static {
group 233.252.0.1 ;
}
}
3. After you have committed the configuration and the source is sending traffic, use the
show igmp group command to verify that static group 233.252.0.1 has been created.
user@host> show igmp group
Interface: fe-0/1/2
Group: 233.252.0.1
Source: 10.0.0.2
Last reported by: Local
Timeout: 0 Type: Static
459Copyright © 2017, Juniper Networks, Inc.
Chapter 14: Configuring Internet Group Management Protocol
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