User Hosts in the User VLAN Fail to Receive Multicast Data

Procedure

• Check whether multicast VLAN replication is correctly configured.

  Run the display multicast-vlan vlan vlan-id command to check whether the user VLAN is bound to a correct multicast VLAN.

  • If the user VLAN is not bound to a correct multicast VLAN, run the multicast-vlan user-vlan command to bind VLANs correctly.
  • If the user VLAN is bound to a correct multicast VLAN, check whether other Layer 2 multicast configurations conflict.
    The following information shows that user VLANs 100 and 200 are bound to multicast VLAN 10 correctly.

    [HUAWEI] display multicast-vlan vlan 10
     Multicast-vlan         : 10
     User-vlan Number       : 2
     IGMP snooping state    : Enable
     MLD  snooping state    : Disable
     Prune-source-port state: Disable 
     User-vlan              Snooping-state
     -----------------------------------------------
     100                     IGMP Enable /MLD Disable
     200                     IGMP Enable /MLD Disable

• Check whether Layer 3 multicast forwarding is normal.

  Run the ping multicast host command to check whether Layer 3 multicast forwarding is normal. If Layer 3 multicast forwarding is abnormal, run the capture-packet { interface interface-type interface-number | acl acl-number } ^* command to obtain packet header information from the incoming multicast data flow on the inbound interface. Check the TTL value in the packet header.