Mtest
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Operations Guide
55
C.4 Mtest
The mtest directory contains a small program for testing the multicast membership sockopts and
ioctls. It accepts the following commands, interactively:
j g.g.g.g i.i.i.i - join IP multicast group
l g.g.g.g i.i.i.i - leave IP multicast group
a ifname e.e.e.e.e.e - add ether multicast address
d ifname e.e.e.e.e.e - del ether multicast address
m ifname 1/0 - set/clear ether allmulti flag
p ifname 1/0 - set/clear ether promisc flag
q - quit
where g.g.g.g is an IP multicast address, e.g., 224.0.2.1
i.i.i.i is the IP address of a local interface or 0.0.0.0
ifname is an interface name, e.g., qe0
e.e.e.e.e.e is an Ethernet address in hex, e.g., 1.0.5e.0.2.1
1/0 is a 1 or a 0, to turn the flag on or off
The "p" command to change the promiscuous flag does not work under SunOS, because it uses a
different ioctl for that purpose.
Mtest is useful for establishing targets for multicast ping testing. The results of mtest filter
manipulation can be seen by using the "netstat -nia" command (see next section).
