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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.

ip igmp group limit

• 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 The function provided by this command has been replaced by the updated by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.

multicast group port 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 The function provided by this command has been replaced by the updated by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

JunosE 11.2.x Multicast Routing Configuration Guide

Juniper JUNOSE 11.2.X MULTICAST ROUTING User Manual

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