Juniper JUNOSE 11.1.X MULTICAST ROUTING, Руководство по настройке

Страница: 78 / 270

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
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 The function provided by this command has been replaced by the updated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
56 ■
Limiting the Number of Accepted IGMP Groups
JUNOSe 11.1.x Multicast Routing Configuration Guide