From: Eduardo Rossettini (eduardo.rossettini@gmail.com)
Date: Mon Feb 16 2009 - 03:49:09 ARST
I assume Ruhann got this task from IEWB Vol 2 / Lab 3 which I was labbing up
yesterday..
Interestingly enough, my solution was "ip multicast ttl-threshold 12"
according to what I have read on the DocCD.
My question is: would the proctors rely on the DocCD when grading this type
of task ?
On Sun, Feb 15, 2009 at 3:58 AM, ALL From_NJ <all.from.nj@gmail.com> wrote:
> Very cool! Many thanks for labbing this.
>
> Not that Cisco's commands always make sense to me ... but this makes sense
> IMO. I would however prefer the docs to state "greater to or equal to" the
> configured TTL threshold. Would be a bit more accurate.
>
> Oh well ... many thanks for labbing this. Rock on!
>
>
>
>
> On Sat, Feb 14, 2009 at 3:05 AM, Hobbs <deadheadblues@gmail.com> wrote:
>
> > I have labbed this a few times. I made a post here just a couple days ago
> > too:
> >
> > http://ccietobe.blogspot.com/2009/02/multicast-ttl-threshold.html
> >
> > Let me know what you think. I used high TTLs in my example but you
> > should get the idea.
> >
> > Referring to Ruhann's task, according to the DocCD it would 12, but
> > according to lab results it should be 13.
> >
> > On Fri, Feb 13, 2009 at 11:44 PM, ALL From_NJ <all.from.nj@gmail.com>
> > wrote:
> > > Can someone lab this up? I can tomorrow if no one else can. My
> thoughts
> > on
> > > an easy test:
> > >
> > > Use dense mode
> > > R1 has igmp static groups for a far side interface
> > > R2 has ttl threshold command with links to R1 and R3
> > > R3 sends mcast ping. On R3, configure the ttl of the ping to increase
> > with
> > > each test.
> > > Test ping first before moving on.
> > >
> > > Set the ttl threshnold on R2's link to R1. Increase the configured
> value
> > > with each ping.
> > >
> > > The ttl threshold is looking at the outgoing packets ... what is the
> ttl
> > of
> > > the outgoing packet? By the time the packet is an 'outgoing' packet,
> the
> > > ttl has already been reduced by one ... would be best to lab this
> though
> > to
> > > see the command in action. I can tomorrow if no one else has this
> > > available.
> > >
> > > Also, if my quick test above is 'lame' ... please specify a better test
> > and
> > > I can try whatever you think is good tomorrow.
> > >
> > > From the docs:
> > >
> > > Usage Guidelines:
> > > Only multicast packets with a TTL value greater than the threshold are
> > > forwarded out the interface.
> > >
> > > HTH,
> > >
> > > TGIF. Have a good night team,
> > >
> > > Andrew Lee Lissitz
> > >
> > >
> > >
> > >
> > >
> > >
> > > On Sat, Feb 14, 2009 at 1:15 AM, BALA <balavignesh002@gmail.com>
> wrote:
> > >>
> > >> I agree with Hobbs.
> > >>
> > >> The question is any thing lesser than 13 (13 should be permitted i
> > guess)
> > >> which mean from 12 to 1
> > >>
> > >> so the answer is 12.
> > >>
> > >> --
> > >> Thanks & Regards
> > >>
> > >> Balavignesh R
> > >>
> > >>
> > >
> > >
> > >
> > > --
> > > Andrew Lee Lissitz
> > > all.from.nj@gmail.com
> > >
> >
>
>
>
> --
> Andrew Lee Lissitz
> all.from.nj@gmail.com
>
>
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