Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - MULTICAST ROUTING CONFIGURATION GUIDE 2010-10-07 Configuration Manual page 78

JunosE 11.3.x Multicast Routing Configuration Guide
ip igmp group limit
multicast group port limit
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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 IGMP groups an interface can accept. For
example, if you set a limit of 10 groups for the port and 15 groups for each interface, only
10 groups can 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 prevents the interfaces from
accepting any more groups. Over time, some groups leave the interfaces and, eventually,
a maximum of ten groups remain connected.
Use to limit the number of IGMP groups that an interface can accept.
NOTE: This command is deprecated and might be removed completely in
a future release. The function provided by this command has been replaced
by the updated by limiting bandwidth of multicast streams using the ip
multicast admission-bandwidth-limit command.
Example
host1:boston(config-if)#ip igmp group limit 5
Use the no version to restore the default behavior, in which there is no limit on the
number of IGMP groups that an interface can accept.
See ip igmp group limit.
Use to limit the number of IGMP groups that a port can accept.
NOTE: This command is deprecated and might be removed completely in
a future release. The function provided by this command has been replaced
by the updated by limiting bandwidth of multicast streams using the mroute
port admission-bandwidth-limit command.
Specify the identifier for the port in slot/port format (ERX routers) or in slot/adapter/port
format (E320 router).
slot—Number of the chassis slot in the range 0–6 (ERX7xx models), 0–13 (ERX14xx
models), or 0–16 (E320)
adapter—Adapter number on the E320 IOA module
port—Port number on the I/O or IOA module
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