Re: multicast Forwarding Issue

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Pekka Savola wrote:
On Fri, 10 Sep 2004, Neil Horman wrote:

Jihua Cheng wrote:

Dear Sir,

I am using Linux 2.4.20,  and I need enable multicast forwarding for an application.

Who would please tell me how to enable multicast forwarding? I appreciate your help!

Regards,

Charles
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You should just be able to turn on ip forwarding (echo 1 > /proc/sys/net/ipv4/ip_forward), and then use a routing daemon (such as quagga) to handle the configuration of your multicast routes.


This seems slightly inaccurate.

You will need to run (in practice) either PIM-SM ("pimd") or DVMRP
("mrouted") multicast routing protocol. If PIM is used, which is
commonplace today, the topology will be based on the unicast routes,
and often a unicast routing protocol (such as one from the quagga set) would be needed as well.


Its my understanding that PIM-SM, PIM-DM and DVMRP are supported in quagga.
One might also want to set net.ipv4.conf.all.mc_forwarding to 1.

Sorry, forgot about that :)



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