Configuring the Slow Path Forwarding of IPv4 Multicast Data Packets

The slow path forwarding of IPv4 multicast data packets is enabled by default for PIM-SM groups and disabled by default for PIM-SSM groups. Various commands can be used to change the default settings for the slow path forwarding of IPv4 multicast data packets.

The following task enables slow path forwarding for SSM groups.

  1. Enter global configuration mode. 
    device# configure terminal
  2. Enable PIM globally. 
    device(config)# router pim
  3. Enable slow path forwarding for Source-Specific Multicast (SSM) groups. 
    device(config-pim-router)# slow-path-forwarding enable-ssm
    Slow path forwarding for SSM groups is disabled by default.

The following example disables the slow path forwarding for all IP multicast data packets. 

device# configure terminal
device(config)# router pim
device(config-pim-router)# slow-path-forwarding disable-all

The following example enables the slow path forwarding of IP multicast data packets for SSM groups. 

device# configure terminal
device(config)# router pim
device(config-pim-router)# slow-path-forwarding enable-ssm
Parent topic: PIM Dense