RFC 2121 (rfc2121) - Page 3 of 12

Issues affecting MARS Cluster Size

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RFC 2121           Issues affecting MARS Cluster Size         March 1997


      When a multicast group is VC Mesh based, a group member terminates
      a VC from every sender to the group, per group.

      When a multicast group is MCS based, the MCS terminates a VC from
      every sender to the group.

   LEAFmax affects the Cluster size because of the following:

      ClusterControlVC from the MARS. It has a leaf node per cluster
      member (MARS Client).

      Packet forwarding SVCs out of each MARS Client for each IP
      multicast group being sent to. It has a leaf node for each group
      member when a group is VC Mesh based.

      Packet forwarding SVCs out of each MCS for each IP multicast group
      being sent to. It has a leaf node for each group member when a
      group is MCS based.

   If we have N cluster members, and M multicast groups active (using VC
   Mesh mode, and densely populated - all receivers are senders), the
   following observations may be made:

      ClusterControlVC has N leaf nodes, so
            N

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