Zen Internet Support Forum

We're currently working with SpeedTouch on getting their hardware working with the BBC multicast service.  As soon as we know more we'll make the information available in our Knowledge Base.

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Phil Long
Technical Support Manager - Zen Internet Ltd.

Works with a Linksys WAG354G - Firmware Version : 1.01.05
Enabled IGMP Proxy and UPnP to get the feed.

The 'Watch in this site (Real 10)' worked OK but the 'Watch in this site (Windows Media 9)' link didn't want to know but it worked using the 'Watch with Windows Media 9' link.
Tried it in both Firefox & IE7, same results.

Tom

There is now a sticky at the top of this forum collating the information known so far. Please read this first, and then post here with your findings.

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Kindest regards,

James Sweet
http://www.zen.co.uk

James, thanks for collecting the reports. I think you're confusing Belkin model numbers with Linksys, though. tabact's WAG354G is a Linksys, and I'm fairly certain 1mbuser's "Belkin wireless G" isn't a WAG54G.

Mine is a Linksys WAG54G (v1, firmware 1.02.7), and I'm not getting any luck. On the net, there seem to be mixed reports about the capabilities of the Linksys WAG54Gv2 -- but I *think* people should get better luck than with mine.

On the software end of things, have any Mac users had any luck with the H.264 stream in QuickTime 7? I did get things working at work (JANET feed) on the Real stream, but QT got confused about the exact video codec when I tried feeding the H.264 sdp file to it. It handled the AAC stream without a problem.

Well, on the Zyxel Prestige front - I'm still no further. I've emailed Zyxel support, so we'll see if they have any bright ideas!

Have you enabled igmp on the wan interface?

That option on my 662hw appears in the cli interface only, no mention on the web management interface. Problem is my router does endless reboots when enabled.. This might be down to the beta firmware I run as the latest breaks multi-nat

oops yes. Updated

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Kindest regards,

James Sweet
http://www.zen.co.uk

To any Zen support staff who have the faintest clue about Linux, IGMP and Multicast.

I have recently reconfigured my setup here at home using the PPPoE pass through on the Draytek and having my Linux box terminate the PPP session, meaning that Linux is effectively my broadband router now. I did this in the hope that Linux would easily (and I stress easily) be able to support multicast and reading many Google searches, this would seem to be the case.

Having now spent a good few days trying to configure Linux to support multicast, I'm now out of ideas. I have compiled kernel 2.4.32 with multicast support. I can see the IGMP packets which Zen's gateways are sending, they look something like this:

IP 62.3.83.5 > 224.0.0.1: igmp query v2

Is this IGMP v2 ?

Also, when I try and view a BBC multicast in Windows Media player, I notice my XP machine sends out the following:

IP 88.96.X.X > 224.0.0.22: igmp v3 report, 1 group record(s)
IP 88.96.X.X > 224.0.0.22: igmp v3 report, 1 group record(s)
IP 88.96.X.X > 224.0.0.22: igmp v3 report, 1 group record(s)

Is this IGMP v3 ?

Basically, I'm after guidance on how to get this working. What version(s) of IGMP is XP using and are Zen's gateways using? Do I need to install a multicast routing daemon on Linux for it to start routing multicast datagrams? How do I do this? Is there such a daemon? (I have tried mrouted but considering it's 5 years old now, it doesn't compile very well).

Any help much appreciated.

IGMP queries for all version are sent to 224.0.0.1 - a specially designated multicast IP meaning all multicast capable hosts.

From what I've read if the router is sending you IGMP v2 Membership queries then even if your host is IGMP v3 capable you should be replying with IGMP v2 Membership reports. It probably can't understand IGMP v3 membership reports.

IGMP v2 membership reports are sent to the GDA (group destination address) of the multicast group (probably an IP address greater than 224.0.1.0 )
IGMP v3 membership reports are always sent to 224.0.0.22, but specify within the packet the GDA they wish to join (AND what sources they wish to accept from)

If you want to get into the nitty gritty of how its supposed to work then you can always look at the RFCs:
RFC1112 - IGMP v1 RFC2236 - IGMP v2, RFC3376 - IGMP v3

Have you correctly configured the IGMP proxy on your linux machine? As a proxy it will need to re-transmit the IGMP queries to your machines, and the reports back to the Zen gateway router, making a note of the GDA, so that when the stream comes in it can transmit that on to your hosts...

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Kindest regards,

James Sweet
http://www.zen.co.uk

Well I've given up for the moment. I worked out how to change XP to send v1 IGMP requests (a registry modification) but this has made no difference.

I upped the kernel version on the Linux router to 2.6 and was getting ping reply's from some of Zen's gateways when pinging 224.0.0.1 - but other than this, nothing else to report. The problem lies with the fact that IGMP is not a routable protocol, it is interface specific and so any IGMP messages sent either side of the linux box (on the ppp0 interface for Zen's gateways or on eth0 for Windows XP) are not relayed through the linux box. Which would then explain why an IGMP proxy is required. Which then brings us to the next question - is there an IGMP proxy in existence for linux? The only one I've found (and tried) is on this page: http://madynes.loria.fr/Software_gb.htm and it doesn't appear to work (seems to be only IGMPv3).

For a service that either works or doesn't, this seems to be very hit and miss. Just as well the BBC are keeping it in trial mode for the moment because although this may work on single host ADSL connections or ADSL routers with inbuilt IGMP proxies, it would seem to be not such a trivial task for the likes of Linux!

just posting to confirm my Belkin router model number is F5D7632-4

Hardware ver: R01
Software ver: F5D7632v1.UK.1.00.09 (Jul 13 2005 19:14:46)
Build type: RELEASE
Compiler: gcc 2.95.3 20010315 (release)

Thanks for that post - the list has been updated.

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Kindest regards,

James Sweet
http://www.zen.co.uk

Typical I just looked at the list so far and I own two routers

Vigor 2600+

Speedtouch 510

Looks like multicast is out for me

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Ken

Zen Active 8000

By the time a family pays off the mortgage for a home in the suburbs, the home isn't home,and the suburbs aren't suburbs.

I have a Zoom ADSL X4 which has IGMP Proxy options in the configuration web pages.

I've turned these on but still the dreaded 'this connection requires multicast' from Real Player and the H.264 quicktime options don't connect either.

Am I missing some configuration at the computer end rather than the router (Mac OS X 10.4.5). I'm not using the Mac OS X firewall.

It's a bit naff if products are out there claiming that things work and supplying the options but which in fact don't.

I have a Cisco 1700 which does support IGMP proxy, but I still can not get it to work.

On the ADSL side, I have
ip pim dense-mode
ip igmp helper-address 62.3.82.18

on the internal interface I have
ip pim sparce-mode
ip igmp mroute-proxy loopback0

and on loopback0 I have
ip pim dense-mode
ip igmp helper-address udl ethernet0
ip igmp proxy-service

Anyone know why I can not view the BBC in mutlicast? I get the same error as everyone else... this can only be viewed in mutlicast!

Many thanks,