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Both Active members forward the PIM Dense-Mode Multicast traffic in a setup of two ClusterXL in HA mode with IGMP Membership connected on the same segment Technical Level
Symptoms
  • In a setup of two ClusterXL in High Availability mode with IGMP Membership connected on the same segment (with different values of 'fwha_mac_magic'), both Active members forward the PIM Dense-Mode Multicast traffic that passes through these clusters (the multicast receiver shows packets with the source MAC address of both Active members).

  • PIM Sparse-Mode Multicast traffic is forwarded correctly by the DR (only by one of the Active members).

  • Changing the priority of PIM interfaces does not change anything until RouteD daemon is killed on all cluster members.

  • Disabling or enabling of SecureXL does not change anything.

  • RouteD trace (PIM, IGMP and MFC) shows:
    igmp_process_wrong_iif: received a register packet, iif == 0
Cause

Incorrect handling of "wrong iif" notifications in RouteD daemon in PIM Dense-Mode when the interface is "vif 0" - when RouteD daemon sees that "iif = 0", it does nothing thinking it is the "pimreg" interface.


Solution
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