Re: Multicast and GNS3

Yes! There are definitely some issues with Multicast in Dynamips! I also
find that sending extended volumes of traffic (pings with high repeat
counts) will screw things up. Eventually I have to reload the entire
topology. This is why I limit my multicast ping tests to around 5-10 pings
at a time. Not a big deal because thats all it really takes to test
Multicast routing.

2011/10/20 gp <gs4me2me_at_gmail.com>

> I have the same problem with gns3, sometimes work, sometimes not. Using fe
> int.
>
> Gp
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Piotr Malarski
> Sent: Thursday, September 16, 2010 8:27 PM
> To: Chris Grammer
> Cc: Cisco certification
> Subject: Re: Multicast and GNS3
>
> Hope this will work for you. On FE links I even had random problem
> with pinging adjacent interfaces...
>
> On Thu, Sep 16, 2010 at 2:22 PM, Chris Grammer <cgrammer_at_essilorusa.com>
> wrote:
> > Awesome!
> >
> > Thanks
> >
> > Chris
> >
> > On Thu, Sep 16, 2010 at 1:17 PM, Piotr Malarski
> > <piotr.malarski.99_at_gmail.com> wrote:
> >>
> >> I had similar problems with Dynamips. I replaced all FastEthernet
> >> links with Serial links. I have no idea why but it works now.
> >>
> >> On Thu, Sep 16, 2010 at 2:06 PM, Chris Grammer <cgrammer_at_essilorusa.com
> >
> >> wrote:
> >> > Has anyone experienced problems with multicast and GNS3?
> >> > I can run about 20 routers on my setup (20 just to see if i could do
> it
> >> > :)
> >> > )
> >> > I usually run 8 or 9 routers with MPLS or IGP scenarios with no
> problems
> >> > at
> >> > all.
> >> >
> >> > But, I can run a 4 router multicast scenario with an infinite ping to
> >> > the
> >> > multicast group and weirdnesses start occurring.
> >> >
> >> >
> >> > For instance, I had an Auto-RP setup and after about 100 pings, ospf
> >> > peers
> >> > started dropping.
> >> > I switched to EIGRP and the same thing...eigrp hellos start timing
> out.
> >> > It appears to be something the ping to a multicast group.
> >> >
> >> > I did some google searches, but cant find anything related.
> >> >
> >> >
> >> > Chris
> >> >
> >> >
> >> > 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/CCIELab.html
>
>
> 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
Received on Thu Oct 20 2011 - 16:27:48 ART