From: Gregory Gombas (ggombas@gmail.com)
Date: Wed Nov 14 2007 - 11:09:58 ART
Please correct me if I'm wrong, but when you ping aren't you
simulating the server or the source of the multicast traffic? Do IGMP
messages still need to be sent in order to source multicast traffic
from a router?
Thanks,
Greg
On Nov 13, 2007 9:25 AM, Scott Morris <swm@emanon.com> wrote:
> Where are you originating a ping from? A PC or the non-multicast-enabled
> router?
>
> A PC should automatically participate in IGMP, and if you have ANY multicast
> enabled router on the same LAN with it, then it should participate as an
> IGMP querier as well. (show ip igmp interfaces may help here)
>
> A router, however, will not magically serve as an igmp client.
>
> HTH,
>
>
> Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE-M
> #153, JNCIS-ER, CISSP, et al.
> CCSI/JNCI-M/JNCI-ER
> VP - Technical Training - IPexpert, Inc.
> IPexpert Sr. Technical Instructor
>
> A Cisco Learning Partner - We Accept Learning Credits!
>
> smorris@ipexpert.com
>
>
>
> Telephone: +1.810.326.1444
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>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> nicky noname
> Sent: Tuesday, November 13, 2007 6:50 AM
> To: Cisco certification
> Subject: using multicast from a non multicast speaker
>
> Hello,
>
> I am trying to ping a multicast feed over a dense mode network. I am on a
> LAN router that is not enabled for Mcast. There is a multicast router on the
> LAN. I cannot get a response. Is this because I am not an IGMP client?
>
>
> I thought that a non Mcast enable router could ping Mcast feeds, if they are
> dirtectly connected to a Mcast router, once you define the correct interface
> and make sure of the RPF check?
>
> Sorry...I have a hole in my thinking here.......any someone help.
>
> thanks
> Nic
>
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