mcfirst1
Check if you can receive ipv4/ipv6 multicast
Usage
mcfirst [-46vr]
[-I
interface]
[-c
count]
[-t
time]
[source]
group
port
Overview
mcfirst 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. mcfirst 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.
Options
The options are as follows.
-
-4 -
Force IPv4
-
-6 -
Force IPv6
-
-v -
Print version
-
-r -
Print rate information only
-
-I interface -
Interface to join on
-
-c count -
Stop after receiving count packets. Default is 1 unless time limit is specified
-
-t time -
Exit after time seconds. Default is to exit after the first packet. If both count and time are specified, mcfirst will exit as soon as one of them is satisfied.
Releases
Unchanged in 8 releases since Debian 6.0 (Squeeze).