08-01-2021, 04:29 AM
There is no IGMP join to RP, only PIM join
Probably "send join messages toward a multicast source SPT" is a better answer.
https://www.cisco.com/c/en/us/support/do....html#anc7
Step 4. (S,G) Packet Reaching towards the FHR
Probably "send join messages toward a multicast source SPT" is a better answer.
https://www.cisco.com/c/en/us/support/do....html#anc7
Step 4. (S,G) Packet Reaching towards the FHR
- Only presence of REGISTER MESSAGE at RP (S,G) PIM JOIN travel to the FHR. To create the Forwarding state.
- After the PIM JOIN it complete the process to create a Hardware Forwarding State for Multicast traffic flow.
- If there are (*,G) listeners, the RP starts constructing SPT toward the multicast source IP address. This is where the RPF check is performed to find out the upstream interface to send the PIM Join to.