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Recommended Configuration examples.

This is a _very_ gross outline of the configuration items that we have found
to work well.  You may or may not want to follow this example.  Because
this is a generic example, it may not be appropriate for all routers on your
network.

    !
    ip multicast-routing
    ip sdr cache-timeout 180
    ip dvmrp route-limit 7000
    ip multicast cache-headers
    !
    interface <interface>
      ip pim sparse-dense-mode
      ip mroute-cache
      ip sdr listen             <NOTE: only on one interface>
      ip multicast boundary 10  <NOTE: only on an interface leading to 
                                       another domain>
    !
    ip pim accept-rp Auto-RP <list>  <NOTE: list excludes dense groups
                                            that you wish to define see list
                                            98 below.>
    !
    ip pim send-rp-announce Ethernet3/0 scope 8 group-list 95
        <NOTE: for RP's only>
    !
    ip pim send-rp-discovery scope 8
        <NOTE: for mapping agents only>
    !
    !
    access-list 10 deny 224.0.1.39   <NOTE: to prevent external auto-rp 
    access-list 10 deny 224.0.1.40          announcements>
    !
    !NOTE: This access list used with "ip pim accept-rp Auto-RP" will
    !set the following group ranges as dense groups.  By default, this
    !will also set up the auto-rp groups (224.0.1.[39|40]) as dense groups.
    !
    access-list 98 deny   239.254.253.0 0.0.0.255
    access-list 98 deny   239.254.251.0 0.0.0.255
    access-list 98 deny   239.254.249.0 0.0.0.255
    access-list 98 deny   239.254.247.0 0.0.0.255
    access-list 98 permit any
    !
.