Dell C9000 Series Networking Configuration Manual page 728

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Preventing a PIM Router from Processing a Join
To permit or deny PIM Join/Prune messages on an interface using an extended IP access list, use the
following command.
NOTE: Dell Networking recommends not using the ip pim join-filter command on an interface
between a source and the RP router. Using this command in this scenario could cause problems with the
PIM-SM source registration process resulting in excessive traffic being sent to the CPU of both the RP and
PIM DR of the source.
Excessive traffic is generated when the join process from the RP back to the source is blocked due to a
new source group being permitted in the join-filter. This results in the new source becoming stuck in
registering on the DR and the continuous generation of UDP-encapsulated registration messages
between the DR and RP routers which are being sent to the CPU.
• Prevent the PIM SM router from creating state based on multicast source and/ or group.
ip pim join-filter
ip pim sparse-mode
ip address 10.11.4.1/24
untagged GigabitEthernet 1/2
no shutdown
Multicast Features 728