netdev - Re: multicast with multiple devices

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Message-ID: <OFD882A076.C7BD1EA7-ON88257455.005F4F9F-88257455.005FC5BC@us.ibm.com>
Date:	Mon, 26 May 2008 10:26:08 -0700
From:	David Stevens <dlstevens@...ibm.com>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	netdev@...r.kernel.org
Subject: Re: multicast with multiple devices

Most multicast applications don't use the routing table at all. Instead,
you should specify the particular interface you want, since the same
group number on different interfaces often isn't the same group.

You can use IP_MULTICAST_IF, SO_BINDTODEVICE, etc., and 
of course specify the interface in the IP_ADD_MEMBERSHIP call
for listeners.

                                                +-DLS

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