IGMPv2
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... versions of IGMP. As long as the Type is
one that is recognized, an IGMPv2 implementation MUST ignore anything
past the first 8 octets while processing the packet. However, the
...
... that interface is running IGMPv1 or IGMPv2. This variable MUST
be based upon whether or not an IGMPv1 query ...
... their routers; in the absence of explicit configuration, the
configuration MUST default to IGMPv2. When in IGMPv1 mode,
routers ...
... Group messages. They SHOULD also warn
about receiving an IGMPv2 query, although such warnings MUST be
rate-limited.
...
... subnet where there are hosts that
have not yet been upgraded to IGMPv2. The following requirement
applies:
...
... subnet where there are hosts that
have not yet been upgraded to IGMPv2. The following requirements
apply:
...
... Note: in older (i.e., non-standard and now obsolete) versions of
IGMPv2, hosts send Leave Messages to the group being left. A
...
...
IGMPv2 was designed by Rosen Sharma and Steve Deering.
...
... querier per network, so the election
mechanism has been standardized in IGMPv2. However, this means that
care must be taken when an IGMPv2 router ...
... mechanism has been standardized in IGMPv2. However, this means that
care must be taken when an IGMPv2 router is trying to coexist with an
IGMPv1 ...
... router that uses a different querier election mechanism. In
particular, it means that an IGMPv2 router must be able to act as an
IGMPv1 ...