Re: Unicast works, but Multicast will not
- From: "SysAdmin99" <SysAdmin99@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 31 May 2005 05:35:07 -0700
Mike, Thanks for responding.
I only disabled UDP traffic on the client side, but when I enable UDP on the
client, the client will establish a unicast session. I checked the setup on
the server and I do not see any settings for enabling UDP.
When I check the multicast group memberships on the Cisco 3550 router, I see
that the server is establishing a multicast group and the client joins the
multicast session, but then disconnects shortly after, never actually getting
a multicast session. I believe the Cisco switches (IGMP Snooping) and the
multicast router are configured correctly, because I have other multicast
applications that work correctly.
"Mike Lowery" wrote:
> RTP is not involved with multicast broadcasts. You should be seeing multicast
> packets flowing from your video server to your client PC. The only other
> traffic you should see are the IGMP joins to the multicast group coming from
> your client. The server should always be spitting out multicast packets, even
> if there is no client receiving them.
>
> Multicast _is_ UDP, so if you've disabled that, perhaps that's the issue.
>
> "SysAdmin99" <SysAdmin99@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:1B43C88C-9F75-4BDD-A02F-2B31E1663356@xxxxxxxxxxxxxxxx
> > Just to update what I have done:
> >
> > I have a network sniffer and captured packets from the client requesting the
> > multicast session and the streaming server. From the client, I see it
> > sending a IGMP Report messages to the Mulicast group IP address of the
> > server. On the server side, I see RTP (Real Time Transport) protocol
> > messages being sent out to the client. The client still will not connect
> > with the session.
> >
> >
> > "SysAdmin99" wrote:
> >
> > > We are trying to multicast live video via Windows Media Sevices running on
> > > Windows Server 2003 Enterprize. I am using Windows Media encoder in a PUSH
> > > mode to the piblishing point. I have multicast enabled on the publishing
> > > point and have run the annoucement wizard to create the necessary NSC file
> > > and ASX file for the clients.
> > >
> > > I am testing this by disabling TCP, UDP, HTTP on the client running Windows
> > > Media Player Version 10 and only allowing Multicast. Running the player in
> > > this mode, an error message displays as follows: Windows Media player cannot
> > > play the file because the server is not available.
> > >
> > > The network consists of one Cisco 3550, where the streaming server and the
> > > player are connected - all layer two.
> > >
> > > Any help or suggestions would be greatly appreciated.
> > >
>
>
>
.
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