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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
Multicast Features
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