pim state-refresh-capable

By default, PIM-DM State-Refresh is enabled.

PIM-DM State-Refresh is implemented by periodically sending State-Refresh messages in the network. After receiving a State-Refresh message, the FW in the pruned state resets the prune-status timer. As a result, the downstream interface cannot forward packets before the prune-status timer times out.

After PIM-DM state-refresh is disabled, the interface starts to forward multicast data when the prune timer times out. The downstream routers that do not want to receive the data can send Prune messages. The process is performed periodically, which wastes a lot of network resources. Enabling PIM-DM State-Refresh, therefore, can optimize the network traffic.

You must run the multicast routing-enable command to enable the multicast function before using the command.