Time-to-Live
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... datagram has an IP
time-to-live greater than 1, the multicast router(s) attached to the
local network ...
... member networks that are reachable within the IP time-to-live, an
attached multicast router completes delivery ...
... datagram, if such a capability does not already exist. If the
upper-layer protocol chooses not to specify a time-to-live, it should
default to 1 for all multicast IP datagrams ...
... An incoming datagram is not rejected for having an IP time-to-live of
1 (i.e., the time-to-live should not automatically be decremented on
...
... IP time-to-live of
1 (i.e., the time-to-live should not automatically be decremented on
arriving datagrams that are not being forwarded). An incoming
...
... multicast routers and are never forwarded beyond
a single network, regardless of their time-to-live. Thus, the all-
hosts address ...
... group address being reported, and with an IP
time-to-live of 1, so that other members of the same group on
the same network ...