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C1 IGMPv3 backward compatibility with IGMPv1 and IGMPv2 is not
implemented. See RFC 3376, 7.3. Multicast Router Behavior. That's
because only Source-Specific Multicast is currently targeted.
flow. There could be some provision to prevent such a behavior,
but currently there is none.
+C20 Multicast traceroute module is based on:
+ draft-ietf-idmr-traceroute-ipm-07
+ It only implements, so far, weak traceroutes. The multicast routing
+ state of the router is not quieried but RPF path is followed along
+ PIM and IGMP enabled interfaces.
+
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