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How to multicast on different IP network

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Operating Systems HP-UX How to multicast on different IP network
# 1  
Old 10-08-2006
How to multicast on different IP network
Hi, there
On HP-UX, I want to multicast packets on two different IP network repectively.
The two NIC are configured with two different IP. The routes are added with one default and one net for each IP . The multisender programs bind their own local IP, multireceiver programs add the membership with the same multicast address but different port and interface(IP). Normally, the pair of sender and receiver works correctly. When we pull out the network wired that the default route is configured, the multicast packets can not received on two network. However, when we pull out the network wired that do not configured default route, the packets can still be received with the two multireceiver, at this time, one of the IP can not pinged.
So the above test makes the following results:
1. The multicast has nothing to do with the local IP address, it only cares about the multicast address and port
2. The default route decides the multicast packets whether they can send out.

My question is how I can multicast the packets on the different IP network respectively. Once one of the network failed or its wired is pull out, the other network can still multicast normally. That means how I can implementate the dual network multiucasting,thanks.
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LEARN ABOUT NETBSD

fwip

FWIP(4) 						   BSD Kernel Interfaces Manual 						   FWIP(4)

NAME

     fwip -- IP over IEEE1394 driver

SYNOPSIS

     fwip* at ieee1394if?

DESCRIPTION

     The fwip driver provides standard IP over IEEE1394 based on the protocols described in RFC 2734 and RFC 3146.

     The ieee1394if(4) and fwohci(4) drivers must be configured in the kernel as well.

SEE ALSO

     arp(4), fwohci(4), ieee1394if(4), netintro(4), ifconfig(8), sysctl(8)

HISTORY

     The fwip device driver first appeared in FreeBSD 5.3.  It was added to NetBSD 4.0.

AUTHORS

     The fwip driver and this manual page were written by Doug Rabson, based on earlier work by Hidetoshi Shimokawa.  It was added to NetBSD 4.0
     by KIYOHARA Takashi.

BUGS

     This driver currently does not support the MCAP protocol for multicast IP over IEEE1394.  Multicast packets are treated as broadcast packets
     which is sufficient for most trivial uses of multicast.

BSD
								   June 18, 2005							       BSD