Re: Multicast

What you'll find with pinging a multicast IP address and using the basic ping
command along with the source interface option is that it still sends it out
all interfaces. Only the extended ping truly limits the source interface.
You should be able to debug ip icmp on the router that is emulating the client
and see multiple packets for each echo request. Also do a mtrace from the
router closest to the client or the router emulating the client to the Fa0/0
interface IP address of the source router.

--
Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
bdennis_at_ine.com<mailto:bdennis_at_ine.com>
INE, Inc.
http://www.INE.com<http://www.ine.com/>
From: Mohammad Mousa <mohd-mousa_at_hotmail.com<mailto:mohd-mousa_at_hotmail.com>>
Date: Tuesday, September 25, 2012 1:43 PM
To: Brian Dennis <bdennis_at_ine.com<mailto:bdennis_at_ine.com>>,
"ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>"
<ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>>
Subject: RE: Multicast
Hello Brian,
I used regular ping without specifynig anything like ping 239.x.x.x, also when
I used ping 239.x.x.x source from where the question should (f0/0) it was
working fine, but when I uesed the
extended ping command, I specified the interface f0/0 and the ip address of
it.
Thanks alot for your concern :)
> From: bdennis_at_ine.com<mailto:bdennis_at_ine.com>
> To: mohd-mousa_at_hotmail.com<mailto:mohd-mousa_at_hotmail.com>;
petesccie_at_gmail.com<mailto:petesccie_at_gmail.com>;
ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>
> Date: Tue, 25 Sep 2012 14:49:52 -0500
> Subject: Re: Multicast
>
> Have you checked to see what source IP address that the extended ping is
> using and done a RPF check against it? When you do a standard ping to
> multicast address the source interface is all interfaces whereas with the
> extended ping you can specify the source interface. Also you might try to
> mtrace from th e client to the source.
>
> --
> Brian Dennis, CCIEx5 #2210 (R&S/ISP-Dial/Security/SP/Voice)
> bdennis_at_ine.com<mailto:bdennis_at_ine.com>
>
> INE, Inc.
> http://www.INE.com <http://www.ine.com/>
>
>
>
>
>
>
> On 9/25/12 9:10 AM, "Mohammad Mousa"
<mohd-mousa_at_hotmail.com<mailto:mohd-mousa_at_hotmail.com>> wrote:
>
> >Hi Peter,
> >
> >I was working on real gear, My case was really strange because the normal
> >ping worked over and over but the extended ping worked and got response
> >for two reply only. I thought this because the last hop router, when it
> >changed from shared tree to source tree. I tried to put ip pim spt
> >infinity !! but it wasn't work and no reply I got.
> >Brian explained it at INE video, but seem I don't understand it well. :'(
> >
> >Any idea?Btw thank you for your answer.
> >
> > > Subj ect: Re: Multicast
> >> From: petesccie_at_gmail.com<mailto:petesccie_at_gmail.com>
> >> Date: Tue, 25 Sep 2012 16:49:41 +0100
> >> To: mohd-mousa_at_hotmail.com<mailto:mohd-mousa_at_hotmail.com>
> >>
> >> Is this on real kit or gns3? I've seen strange issues with gns3 and
> >>multicast in the past. If gns3 - restart the lab kit and do your
> >>extended ping first and see what results you get..
> >> I've seen multicast work fine in gns3, but then stop working after a
> >>few mins testing & sending some large repeated multicast pings etc.
> >>
> >> Rgds,
> >> Peter
> >>
> >> Sent from my iPhone
> >>
> >> On 25 Sep 2012, at 04:32 p.m., Mohammad Mousa
<mohd-mousa_at_hotmail.com<mailto:mohd-mousa_at_hotmail.com>>
> >>wrote:
> >>
> >> > Hi folks, I have strange issue, I confiugred multicast network and
> >>eveything is working fine. When I used regular ping 239.x.x.x repeat 300
> >>source X I got full response. but when I used the extnded pingcommand I
> >>got only two responses and no reachibility after that. Any advices,
> >>any guidance before posting the diagram,Thanks in advance !
> >>
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
> >>_______________________________________________________________________
> >> > Subscription information may be found at:
> >> > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> >Blogs and organic groups at http://www.ccie.net
> >
> >_______________________________________________________________________
> >Subscription information may be found at:
> >http://www.groupstudy.com/list/C CIELab.html
Blogs and organic groups at http://www.ccie.net