can be used to check whether one can receive multicast packets from a host. The host may send any type of
multicast packets, any application, IPv4 or IPv6, ASM or SSM.
joins the specified (source) and group, and listens to the specified port.
mcfirst will by default exit when the first packet is received, and print how long it waited.
The options are as follows.
Print rate information only
Interface to join on
Stop after receiving
packets. Default is 1 unless time limit is specified
seconds. Default is to exit after the first packet. If both
are specified, mcfirst will exit as soon as one of them is satisfied.
ssmping(1) a tool for checking whether can receive SSM.
dbeacon(1) a distributed beacon multicast implementation.