The following conditions apply when you configure SSM mapping:
•
When SSM mapping is enabled, and either you have not configured a static SSM map
or the router cannot find any matching access lists, the router continues to accept
(*,G) groups. The PIM SSM range must deny any unacceptable SSM group addresses.
•
When you issue the no ip igmp ssm-map enable command, the router removes all
SSM map (S,G) states and establishes a (*,G) state.
•
You can enter multiple ssm-map static commands for different access lists. Also, you
can enter multiple ssm-map static commands for the same access list, as long as the
access list uses different source addresses.
•
SSM maps do not process statically configured groups.
ip igmp ssm-map enable
• Use to enable SSM mapping on the router. SSM mapping statically assigns sources to
IGMPv1 and IGMPv2 groups. You must use SSM mapping for IGMPv1 and IGMPv2 hosts
to interoperate with PIM SSM. SSM mapping enables the router to use a statically
configured list to translate (*,G) memberships to (S,G) memberships.
• Example
host1:boston(config)#ip igmp ssm-map enable
• Use the no version to disable SSM mapping on the router.
• See ip igmp ssm-map enable.
ip igmp ssm-map static
• Use to specify an access list and source address for use in SSM mapping. SSM mapping
statically assigns sources to IGMPv1 and IGMPv2 groups. You must use SSM mapping
for IGMPv1 and IGMPv2 hosts to interoperate with PIM SSM. SSM mapping enables
the router to use a statically configured list to translate (*,G) memberships to (S,G)
memberships.
• Example
host1:boston(config)#ip igmp ssm-map static boston-list 51.0.0.1
• Use the no version to remove the SSM map association.
• See ip igmp ssm-map static.
Limiting the Number of Accepted IGMP Groups
By default, there is no limit on the number of IGMP groups that an IGMP interface can
accept. However, you can manage multicast traffic on the router by restricting the number
of IGMP groups accepted by:
•
A specific port on an I/O module
•
A specific IGMP interface
53Copyright © 2010, Juniper Networks, Inc.
Chapter 2: Configuring IGMP
To Next Page
Loading...
Need help?
General
