When you create IGMP static group membership to test multicast forwarding on an
interface on which you want to receive multicast traffic, you can specify that a number
of multicast sources be automatically accepted. This is useful when you want to test
forwarding to multicast receivers from more than one specified multicast source.
In this example, you create group 233.252.0.1 and accept addresses 10.0.0.2, 10.0.0.3,
and 10.0.0.4 as the sources.
1. On the DR, configure the number of multicast source addresses to be accepted by
including the source-count statement and specifying the number of sources to be
accepted.
[edit protocols igmp]
user@host# set interface fe-0/1/2 static group 233.252.0.1 source 10.0.0.2 source-count
3
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 {
version 3;
static {
group 233.252.0.1 {
source 10.0.0.2 {
source-count 3;
}
}
}
}
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
and that sources 10.0.0.2, 10.0.0.3, and 10.0.0.4 have been accepted.
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
Group: 233.252.0.1
Source: 10.0.0.3
Last reported by: Local
Timeout: 0 Type: Static
Group: 233.252.0.1
Source: 10.0.0.4
Last reported by: Local
Timeout: 0 Type: Static
463Copyright © 2017, Juniper Networks, Inc.
Chapter 14: Configuring Internet Group Management Protocol
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