Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - MULTICAST ROUTING CONFIGURATION GUIDE 2010-10-07 Configuration Manual page 212

JunosE 11.3.x Multicast Routing Configuration Guide
ipv6 mld ssm-map static
Limiting the Number of Accepted MLD Groups
190
Use to enable SSM mapping on the router. SSM mapping statically assigns sources to
MLDv1 groups. You must use SSM mapping for MLDv1 hosts to interoperate with PIM
SSM. SSM mapping allows the router use a statically configured list to translate (*,G)
memberships to (S,G) memberships.
Example
host1:boston(config)#ipv6 mld ssm-map enable
Use the no version to disable the SSM map.
See ipv6 mld ssm-map enable.
Use to specify an access list and source address for use in SSM mapping. SSM mapping
statically assigns sources to MLDv1 groups. You must use SSM mapping for MLDv1
hosts to interoperate with PIM SSM. SSM mapping allows the router to use a statically
configured list to translate (* ,G) memberships to (S,G) memberships.
The ipv6 mld ssm-map static command uses IPv6 access lists, which allow both
source and destination/group addresses to be specified. You must set the source
address to " any."
Example
host1:boston(config)#ipv6 mld ssm-map static boston-list 2001::1
Use the no version to remove the SSM map association.
See ipv6 mld ssm-map static.
By default, there is no limit on the number of MLD groups that an MLD interface can
accept. However, you can manage multicast traffic on the router by restricting the number
of MLD groups accepted by:
A specific port on an I/O module
A specific MLD interface
If you set limits for both a port and interfaces on that port, the router uses the lower of
the two limits when determining how many MLD groups an interface can accept. For
example, if you set a limit of 10 groups for the port and 15 groups for each interface, the
router allows only 10 groups to be accepted among the interfaces.
However, if you set a limit for a port and that limit is lower than the number of groups
currently accepted by the interfaces on that port, the router does not dissociate the
groups from the interfaces. The router enforces the new limit on the port when the number
of groups associated with the interfaces falls to that limit. For example, if the interfaces
on the port have accepted a total of 15 groups, and you set a limit of 10 groups on the
port, the router does not disconnect any of the groups and does not allow the interfaces
to accept any more groups. Over time, some groups leave the interfaces and, eventually,
a maximum of ten groups remains connected.
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