[streaming] Re: Multicast streaming over VPN

[Martin Forget]

a linksys is not a switch, so it doesn't forward or snoop igmp  
messages by defautl...

the best way to troubleshoot is using a tcpdump next to your  
multicast router.
debug ip igmp on cisco..
if you don't have a multicast router, debug igmp snooping on your  
layer-2 switch.

the igmpproxy software that i crossed-compiled is http:// 
sourceforge.net/projects/igmpproxy

an other way is to setup a PIM (i suggest sparse-dense) router on the  
client side of the gre tunnel
(if you have a cisco l3 device, this is probably better than  
igmpproxying)

of if you have a full power linux box, you can use pimd which is part  
of iproute2 on linux

if you need documentation on igmpproxying / pim multicast routing,  
check the cisco website
this is a networking issue... cisco has the most doc.

-martin


On 4-Dec-06, at 6:14 AM, Ari Constancio wrote:

> Thanks for the replies!
>
> Probably the IGMP proxy is the missing part I'm looking for; smcroute
> can be used for static routes.
>
> Ari Constancio
>
> On 12/2/06, Martin Forget <mforget at mtotelecom.com> wrote:
>> we did the same thing and it works great.
>>
>> cisco 3750 layer 3 at the core (for GRE tunnel termination)
>>
>> linksys WRT54G with openwrt at the cpe
>>
>>
>> the linksys initiates a gre tunnel to the cisco switch/router,
>>
>> you also need an igmpproxy daemon running on openwrt to forward the
>> igmp messages over the tunnel
>> and some static routing in openwrt.
>>
>> the network architecture looks like:
>> settobox/vlc client-->lan(private) -->igmp_proxy-->gre tunnel-->NAT
>> (linksys)-->internet-->gre terminator-->multicast network
>>
>>
>> i dont' remember the exact igmpproxy software that we had to cross-
>> compile for linksys MIPS processors
>> but if you want, i could find out... or get a binary
>>
>> -martin
>>
>> On 30-Nov-06, at 1:55 AM, lartc wrote:
>>
>> >
>> >
>> > On Thu, 2006-11-30 at 07:08 +1100, Matthew Geier wrote:
>> >> Ari Constancio wrote:
>> >>> Hello,
>> >>>
>> >>> I'm trying to send multicast video streaming over a VPN (PPTP)
>> >>
>> >>> Is there anyone here with experience on this?
>> >
>> > if i remember correctly, GRE tunnels support igmp/multicast ...
>> >
>> > hth
>> >
>> > charles
>> >
>> >
>> > --
>> > This is the streaming mailing-list, see http://www.videolan.org/
>> > streaming/
>> > To unsubscribe, please read http://www.videolan.org/support/ 
>> lists.html
>> >
>
> -- 
> This is the streaming mailing-list, see http://www.videolan.org/ 
> streaming/
> To unsubscribe, please read http://www.videolan.org/support/lists.html
>

-- 
This is the streaming mailing-list, see http://www.videolan.org/streaming/
To unsubscribe, please read http://www.videolan.org/support/lists.html