From: Mr Wibbly (mrwibbly@googlemail.com)
Date: Sat Aug 02 2008 - 11:53:01 ART
Gaurav,
I have never come across that command before, it's very useful - thanks for
sharing it with us.
Mr W. :)
On Sat, Aug 2, 2008 at 8:35 AM, GAURAV MADAN <gauravmadan1177@gmail.com>wrote:
> Just to add ( not related to question you asked ) ...
>
> One can actually see that on a diameter of X .. what will be that
> value of hello , max-age and forward delay ..
>
> The values of 2 sec for hello , 15 for FWD , 20 for max age are for
> Diameter 7 .
>
> on SW :
> ***********
> Rack1SW1#test spanning-tree diameter 7
> diameter 7 and hello time 2 gives max age = 20 and forward delay 15
>
> Rack1SW1#test spanning-tree diameter 6
> diameter 6 and hello time 2 gives max age = 18 and forward delay 13
>
>
> ==========================================================
> On Sat, Aug 2, 2008 at 5:40 AM, Scott Morris <swm@emanon.com> wrote:
> > You are correct. If you dig into the spec for spanning-tree (original
> > 802.1D) you'll find some formulas for determining the timers that are
> based
> > off of an assumed max diameter. If you change the diameter command you
> will
> > influence your timers.
> >
> > It ranks up there with the idea of the 100meters length of twisted pair
> > ethernet cable. You CAN go longer, but you start getting some slightly
> > dysfunctional results in certain cases. ;) Same with STP.
> >
> > HTH,
> >
> >
> > Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al.
> > CCSI/JNCI-M/JNCI-ER
> > Senior CCIE Instructor
> >
> > smorris@internetworkexpert.com
> >
> >
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987
> > Outside US: 775-826-4344
> >
> >
> > Knowledge is power.
> > Power corrupts.
> > Study hard and be Eeeeviiiil......
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Hobbs
> > Sent: Friday, August 01, 2008 5:32 PM
> > To: GS CCIE-Lab
> > Subject: Does "spanning-tree root primary diameter" really limit a number
> of
> > hops between hosts on an L2 network?
> >
> > I got a task that said to limit the number of switches between hosts on
> an
> > L2 network. I knew what they wanted, but I don't like this wording at
> all.
> > There's no TTL in an ethernet header!
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
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>
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