Dell Force10 C150 Configuration Manual page 669

Rate Limit IGMP Join Requests
If you expect a burst of IGMP Joins, protect the IGMP process from overload by limiting that rate at which
new groups can be joined using the command
whose IGMP requests are denied will use the retry mechanism built-in to IGMP so that they're
membership is delayed rather than permanently denied.
View the enable status of this feature using the command
mode.
Prevent a PIM Router from Forming an Adjacency
To prevent a router from participating in Protocol Independent Multicast (PIM) (for example, to configure
stub multicast routing), use the
Prevent a Source from Registering with the RP
ip pim register-filter
Use the command
transmitting to a particular group. This command prevents the PIM source DR from sending register
packets to RP for the specified multicast source and group; if the source DR never sends register packets to
the RP, no hosts can ever discover the source and create an SPT to it.
In Figure 30-3, Source 1 and Source 2 are both transmitting packets for groups 239.0.0.1 and 239.0.0.2. R3
has a PIM register filter that only permits packets destined for group 239.0.0.2. An entry is created for
group 239.0.0.1 in the routing table, but no outgoing interfaces are listed. R2 has no filter, so it is allowed
to forward both groups. As a result, Receiver 1 receives only one transmission, while Receiver 2 receives
duplicate transmissions.
ip igmp group-join-limit
ip pim neighbor-filter
command from INTERFACE mode.
from CONFIGURATION mode to prevent a source from
from INTERFACE mode. Hosts
show ip igmp interface
from EXEC Privilege
Multicast Features | 669