Zen Internet Support Forum

How do get multicast (IGMP )to work on my Linksys wag54gs which is compatible with it.
I trawl through the various setup dtails and cannot find anything.

Help please

Are you sure that router is compatible? It is not one that is currently listed in our Multicast advice sticky topic.

However if it is anything like the WAG354G then the advise in the above topic is to enable IGMP proxy and uPnP. Possibly may need to upgrade the firmware before ti has these options (or maybe it just isn't compatible )

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Kindest regards,

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

Looking at the manuals on the Linksys site, the WAG354G has settings for Multicast but the WAG54 does not. So unless any later firmware updates include it then it does not look as though it is compatible.

Andrew

LOL
My router is on the approved list, but the multicast doesnt work with me either (US Robotics 9108 MAxG) default settings and wired

It may need some changes from the default settings. The person who posted that that router worked did not specify what (if anything) he needed to do to get it working.

Try looking through the settings on the web interface and see if there is anything regarding multicast or IGMP that you can enable. Try enabling uPnP too. If it has a firewall you may need to make sure exceptions or switch it off. See the Zytel instruction PDF for firewall rules that were used there.

If you can find out what steps are required to get it working then please post them, and I'll add them to the topic.

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Kindest regards,

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

According to the details on the box it is igmp compatible.

Listing IGMP on the box as a supported protocol does not mean its compatible in real life - the Draytek 2600's say they are IGMP compatible too but we know for a fact they are not.


Unfortunately multicast support is quite dicey on routers - hence why we are compling a list of known working devices (where someone has actually tested it!) It's quite a bit more complicated than standard routing so I'm guessing a lot of router manufacturers who have deadlines to produce a router push it to the bottom of the pile, especially when very few people bother ever use it.

Saying IGMP also does not specify what type of IGMP or in what context they support it.
IGMP comes in 3 versions - IGMP v1, v2 and v3. I believe our gateways use IGMPv2, but will also accept IGMPv3 membership reports for inital group membership (need to confirm this with our Core dept IGMP guru)

Most consumer routers actually need to support IGMP proxying, rather than acting as a real IGMP capable router.

An IGMP proxy will forward the membership reports to the WAN interface, and the enquiries from the WAN to the LAN interface.
When the actual multicast stream comes in this uses UDP packets (destined to an IP like 224.0.1.x.) The router acting as a proxy should probably just flood it to all LAN interfaces (not confirmed this though, this is my own assumption)

A proper IGMP capable router will actually send recieve and understand IGMP messages itself, and can make a note of the GDAs in the IGMP messages, and build a list of what interfaces have hosts interested in what streams.

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Kindest regards,

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

After realising I had previousley checked the wrong manual (WAG54G not WAG54GS) I have had another look at the Linksys site and correct manual, and can still see no sign of actual IGMP support.

Andrew

Well itlooks like back to PC world for return

Me too, I have a Netgear DG834G, am thinking about getting a Zyxel 622HW.

A

James Sweet:

It may need some changes from the default settings. The person who posted that that router worked did not specify what (if anything) he needed to do to get it working.

Try looking through the settings on the web interface and see if there is anything regarding multicast or IGMP that you can enable. Try enabling uPnP too. If it has a firewall you may need to make sure exceptions or switch it off. See the Zytel instruction PDF for firewall rules that were used there.

If you can find out what steps are required to get it working then please post them, and I'll add them to the topic.

 

OK ITS SORTED!, playing fine on media player 10 woohooooo!

Such a simple error on my behalf, select as below via the gui web interface
WAN setup button
Select edit
next
next
next
check enable IGMP Multicast
next
Apply
and now the all important bit which stopped it working for me
REBOOT ROUTER
My settings below, as you see firewall is on and it works fine with media player

VPI / VCI:	0 / 38
Connection type:	PPPoA
PPPoE service name:
Service name:	pppoa_0_38_1
Service category:	UBR
IP address:	Automatically-assigned
Service state:	Enabled
NAT:	Enabled
Firewall:	Enabled
IGMP multicast:	Enabled
Quality of service:	Disabled

 

Excellent!

I've updated the sticky topic with that advice.

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Kindest regards,

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

I've been struggling for a couple of weeks now to get multicast working with my:

Zoom X4 modem (which has options for IGMP and IGMP proxy but no uPnP option) and my
Belkin Wireless Router (F5D7230-4) which is uPnP capable.

I've tried various combinations of just checking the IGMP options, also checking the uPnP option, setting up (or attempting to set up) virtual servers on UDP ports 5050 and 5556 but I'm still not having any joy.

Can anyone encapsulate in a nutshell what might be useful options to try? The Zoom doesn't appear to be accessible by anything other than the web interface.

Thanks in anticipation.

Hugh.

My lynksys was not compatible with Multicast. Back to PCWorld and changed it for DLink DSL 904 which definitely compatible.
Now it seems if all the Beeb multicast channels are down.

News24 was working 30 seconds ago.