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Multicast address config lost

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Operating Systems Solaris Multicast address config lost
# 1  
Old 11-15-2009
Multicast address config lost
On Solaris OS, We use the following command to config the multicast address for NIC in order to process the multicast packets:
# route add 228.228.228.228 10.101.10.2
Where " 228.228.228.228 " is the multicast for specified NIC ip 10.101.10.2 .
Also use the netstat -nr, the above set could been displayed as the following:
Code:
Routing Table: IPv4
  Destination           Gateway           Flags  Ref     Use     Interface 
-------------------- -------------------- ----- ----- ---------- --------- 
228.228.228.228             10.101.10.2          U         1       1020 e1000g0

In our program, we use the function:
setsockopt(sockfd,IPPROTO_IP,IP_ADD_MEMBERSHIP,&mreq,sizeof(mreq)) to
join the multicast group and receive the packets.
At the begining, all runs ok. But after about two days later, the multicast address 228.228.228.228 was lost, which cause our program run unnormmally.
What confuse us is that the above phenomena do not exist on the other UNIX/Linux OS. anyone can fix it,thanks.
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LEARN ABOUT FREEBSD

mtest

MTEST(8)						    BSD System Manager's Manual 						  MTEST(8)

NAME

     mtest -- test multicast socket operations

SYNOPSIS

     mtest

DESCRIPTION

     The mtest utility is a small program for testing multicast socket operations.

     It accepts the following commands, interactively, or as part of a scripted input file (useful for automated testing):

	   a ifname mac-addr	     Join the link-layer group address mac-addr on interface ifname.  The group address should be in IEEE 802 MAC
				     format, delimited by colon (':') characters.
	   d ifname mac-addr	     Leave the link-layer group address mac-addr on interface ifname.
	   m ifname 1/0 	     Set or reset ALLMULTI mode on interface ifname.  This option is deprecated and is now a no-op.
	   p ifname 1/0 	     Set or reset promiscuous mode on interface ifname.

	   j mcast-addr ifname [source-addr]
				     Join the multicast address mcast-addr on the interface with name ifname.

				     If an optional source source-addr is specified, a source-specific join will be performed; if mtest is already
				     joined to the multicast address, the source will be added to its filter list.

	   l mcast-addr ifname [source-addr]
				     Leave the multicast address mcast-addr on the interface with address ifname.  If a source source-addr is
				     specified, only that source will be left.
	   i mcast-addr ifname n source-addr ...
				     Set the socket with membership of mcast-addr on interface ifname to include filter mode, and add n sources
				     beginning with source-addr to the inclusion filter list.
	   e mcast-addr ifname n source-addr ...
				     Set the socket with membership of mcast-addr on interface ifname to exclude filter mode, and add n sources
				     beginning with source-addr to the exclusion filter list.
	   t mcast-addr ifname source-addr
				     Set the socket with membership of mcast-addr on interface ifname to block traffic from source source-addr.
	   b mcast-addr ifname source-addr
				     Set the socket with membership of mcast-addr on interface ifname to allow traffic from source source-addr.

	   g mcast-addr ifname n     Print n source filter entries for mcast-addr on interface ifname.

	   f filename		     Read commands from the file filename.
	   s n			     Sleep for n seconds.
	   ?			     List legal commands.
	   q			     Quit the program.

IMPLEMENTATION NOTES

     For each command implemented by mtest, the address family of each argument must be identical; it is not possible to mix IPv4 multicast mem-
     berships with IPv6, for example.

     To support IPv6, all commands have now changed to accept an interface name rather than an interface address.  For IPv4, the program will per-
     form a lookup of the primary IP address based on the interface name.  This may fail if no primary IP address is assigned.

SEE ALSO

     D. Thaler, B. Fenner, and B. Quinn, Socket Interface Extensions for Multicast Filters, RFC 3678.

AUTHORS

     Bruce Simpson
     Steve Deering
     Wilbert De Graaf

BSD
								  April 29, 2009							       BSD