Table 5: IGMP Commands (continued)
ip igmp static-includeip igmp last-member-query-interval
ip igmp versionip igmp promiscuous
multicast group port limitip igmp querier
ip igmp querier-timeout
The following sections describe the tasks associated with these and other ip igmp
commands.
You can also use various IGMP-specific RADIUS attributes in RADIUS Access-Accept
messages as an alternative method of configuring certain values. See Configuring RADIUS
Attributes in the JunosE Broadband Access Configuration Guide for additional information.
Enabling IGMP on an Interface
You must start IGMP on each interface that you want to use the protocol. You can
configure IGMP and either PIM or DVMRP on the same interface. If you configure only
IGMP on an interface, IGMP owns that interface. If you configure IGMP and either PIM or
DVMRP on an interface, PIM or DVMRP owns the interface.
By enabling IGMP, the router processes incoming multicast packets and creates an entry
in the multicast routing table. If neither PIM nor DVMRP own the interface (for example,
when only IGMP is configured), then the packets are locally routed to other interfaces
on the router. PIM or DVMRP must be configured on the interface for packets to be sent
to other routers.
For networks that use only IGMPv1, you can configure an interface to operate in IGMPv1
mode. However, IGMPv2 and IGMPv3 interfaces support IGMPv1 hosts. In an IGMPv1
network, you must configure one interface to act as a querier. In an IGMPv2 or IGMPv3
network, the querier is the router with the lowest IP address.
To start IGMP, complete the following steps:
1. Enable IGMP on the interface (IGMPv2 is the default version).
2. (IGMPv1 or IGMPv3) Specify the IGMP version for the interface.
3. (IGMPv1 only) Specify that the interface act as the querier for the network.
ip igmp
• Use to enable IGMP on an interface and to set the IGMP version to IGMPv2. Use the ip
igmp version command to specify a different IGMP version.
• Example
host1:boston(config-if)#ip igmp
• Use the no version to disable IGMP on an interface.
• See ip igmp.
Copyright © 2010, Juniper Networks, Inc.46
JunosE 11.2.x Multicast Routing Configuration Guide
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