The multicast traffic cannot be transmitted over subscriber's dynamic demux interface on MX304 router.

The issue is present on MPC10 cards in general (MX304 has MPC10 card).

When the subscriber is trying to request multicast traffic using IGMP protocol, the following errors are generated:

Sep 23 16:04:57.687 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:: Mc flow group Pseudo IFL find failed, flowId = 38 pseudoIflIndex = 444 groupId = 2
Sep 23 16:04:57.688 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:: Mc flow group create failed, flowId = 38 groupId = 2 status = No such file or directory
Sep 23 16:04:57.688 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:: Mc flow group create failed, flowId = 52 groupId = 2 status = Generic failure
Sep 23 16:04:57.688 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:: Failed to delete Mc flow from the table, flowId = 52 status = 2
Sep 23 16:04:57.688 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:: Mc group join failed, flowId = 52 groupIdx = 2 status = Generic failure exclude = 0
Sep 23 16:04:57.688 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:: Multicast group join failed,  flow Id = 52 service Id = 1858 group Idx = 2
Sep 23 16:04:57.688 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:HANDLE-VAR: Failed to configure Var type: varType:mc-group-list: varDirection:downlink varProto:any
Sep 23 16:04:57.688 2024  router-re0-fpc0 aftd-trio[19557]: %PFE-3: [t:19708] [Error] VBFMAN:HANDLE-VAR-TRIO: Var initialization failed. varType:mc-group-list: varDirection:downlink varProto:any error:Generic failure
 

As a result, the multicast traffic is not sent to the subscriber.

The issue has been fixed in the PR1839023. The fixed releases can be seen in the PR.