Re: pinging multicast address (source is loopback) ??

http://www.cisco.com/en/US/tech/tk828/technologies_tech_note09186a0080093f21.shtml#mstat
<http://www.cisco.com/en/US/tech/tk828/technologies_tech_note09186a0080093f21.shtml#mstat>look
at mstat,mtrace, mrinfo

On Sat, Oct 31, 2009 at 9:28 PM, ALL From_NJ <all.from.nj_at_gmail.com> wrote:

> Ivan, I hope you are well.
>
> Not sure I fully understand your setup, however a few comments related.
>
> 1) - make sure your IGPs are correctly set up. Mcast relies on the unicast
> routing table too. A good way to test if you have reachability is to do a
> ping and source it with a different interface. Do you have full
> reachability?
>
> 2) Routers need to have connectivity with the RP. Again, this is a routing
> issue.
>
> 3) Make sure that PIM has found it's neighbors. Use the show command and
> make sure that PIM has learned its neighbors.
>
> 4) I might suggest for you to look at mcast via multiple layers. This is a
> repeat, however it is referring to a perspective and approach.
>
> First - have your IGPs and network.
> Second - have your PIM connectivity setup
> Third - configure your RPs. Do all the routers know of the RPs?
> Forth - Configure a igmp group.
> Fifth - add a source via ping.
>
> In this way you will have a network setup, a mcast source, and a mcast
> destination.
>
> HTH,
>
> Andrew Lee Lissitz
>
>
>
> On Fri, Oct 30, 2009 at 9:40 AM, Ivan <ivanzghr_at_gmail.com> wrote:
>
> > OK. I'm doing some multicast labs with topology where I have 6 routers
> and
> > each router has loopback. After I'm done configuring mcast part I need to
> > check it with ping. When I issue ping command to mcast address my ping
> goes
> > out with loopback src address, instead with IP add of the interface where
> > the packet goes out. Why is that? When I specify src to be address of
> > physical int ping is successful. Otherwise ping is failed and in mroute
> > table I have entries like (loopback_add, mcast_add) ??
> > Thx.
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Sent from Karnataka, India
David M. Ogilvy <http://www.quotationspage.com/quote/38324.html>  - "The
best ideas come as jokes. Make your thinking as funny as possible."
Blogs and organic groups at http://www.ccie.net