2008/10/21 Artem Makhutov artem@makhutov.org
Hi,
On Tue, Oct 21, 2008 at 04:44:20PM +0200, Frank Schmirler wrote:
On Tue, 21 Oct 2008 14:46:52 +0200, Artem Makhutov wrote
The ADB-Boxes use Multicast-TS. I have captured a transmission from my IPTV provider. So you can take a look on it:
The .pcap file is not accessible. Would it contain the IGMP traffic, too?
Ah, sorry, I fixed the permissions. Yes, you can the the IGMP traffic there.
Packet #4 is the IGMG Join Group packet. After this one the stream starts. Packet 1,2 and 3 not relevant, they are used for other multicast stuff.
Packet #23114 is the IGMP Leave, after this packet the ISP stops the multicast transmission.
So we can safely assume that this is at least IGMPv2 packets. Since IGMPv1 doesn't have a "Leave Group message".
source : http://www.linux.org/docs/ldp/howto/Multicast-HOWTO-7.html