From: Sandro Ciffali (sandyccie@xxxxxxxxx)
Date: Mon Apr 08 2002 - 21:15:24 GMT-3
My vote goes for Tim,
I would read the question carefuly, If the lab says
the switch should never become root, the only answer
is to disable the spantree for that vlan, Yes there
are drawbacks doing that, But remember you are not
turning off spanning tree for the switch, you are
turning off for that vlan. IF the question says make
the switch less probable to be root then i would
increase the priority. Making the priority 0 is
definatly making it the root, I have tried this using
a switch and a router as a bridge with spanning tree.
Sandeep
8988
--- Greg Parrish <gparrish@yahoo.com> wrote:
> I think turning it off all together is the wrong
> answer. Just like in OSPF if
> they say never become the DR, they dont mean to turn
> off OSPF, just set the
> priority to 0. They need to rephrase the question
> because as someone said I can
> always change all the other switches on the lan to
> the same priority and you
> will become root if you now have the lowest mac, so
> again no guarantee you wont
> be root which is what they are asking you for and
> thus leaves the question
> open.
>
> Greg
>
>
>
>
> Ahmed Mamoor Amimi wrote:
>
> > good one..... <grin>
> >
> > -Mamoor
> >
> > ----- Original Message -----
> > From: Tim O'Brien <tobrien@cinci.rr.com>
> > To: <tsabry@slb.com>; 'Jason' <jgraun@attbi.com>;
> 'Bob Sinclair'
> > <bsin@erols.com>; 'Larry Whitfill'
> <whitfill@cox.net>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Monday, April 08, 2002 7:22 AM
> > Subject: Re: Lab Tomorrow! Need Help
> >
> > > Sure, it definitely has drawbacks, but remember
> that the lab is not real
> > > life.. you are there to "meet the requirements".
> Don't overthink things,
> > > just do what is asked...
> > >
> > > Tim
> > > CCIE 9015
> > >
> > > ----- Original Message -----
> > > From: "Tarek Sabry" <tsabry@houston.sns.slb.com>
> > > To: "'Tim O'Brien'" <tobrien@cinci.rr.com>;
> "'Jason'" <jgraun@attbi.com>;
> > > "'Bob Sinclair'" <bsin@erols.com>; "'Larry
> Whitfill'" <whitfill@cox.net>
> > > Cc: <ccielab@groupstudy.com>
> > > Sent: Sunday, April 07, 2002 9:54 PM
> > > Subject: RE: Lab Tomorrow! Need Help
> > >
> > >
> > > Tim
> > >
> > > But doesn't turning it off has its own
> drawbacks???
> > >
> > > Tarek
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com]On Behalf Of
> > > Tim O'Brien
> > > Sent: Sunday, April 07, 2002 8:27 PM
> > > To: Jason; 'Bob Sinclair'; 'Larry Whitfill'
> > > Cc: ccielab@groupstudy.com
> > > Subject: RE: Lab Tomorrow! Need Help
> > >
> > >
> > > A Priority of 0 is considered better (higher
> priority) than 1 and will
> > most
> > > likely take over root priority...
> > >
> > > To give a switch the "worst" possible chance of
> becoming root, set
> > priority
> > > to 65535 for that vlan...
> > >
> > > To "ensure" that the switch "never" becomes
> root, turn off spanning tree
> > for
> > > that vlan....
> > >
> > > Just my thoughts..
> > >
> > > Tim
> > > CCIE 9015
> > >
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com]On Behalf Of
> > > Jason
> > > Sent: Sunday, April 07, 2002 7:53 PM
> > > To: 'Bob Sinclair'; 'Larry Whitfill'
> > > Cc: ccielab@groupstudy.com
> > > Subject: RE: Lab Tomorrow! Need Help
> > >
> > >
> > > That might work but if another switch gets added
> to the STP domain and
> > > your switch has a lower mac-address then it will
> become the root bridge
> > > assuming that the priority is 65535. I thought
> I read somewhere that
> > > using 0 will make sure that it will never become
> a root bridge.
> > >
> > > Jason
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf Of
> > > Bob Sinclair
> > > Sent: Sunday, April 07, 2002 5:04 PM
> > > To: Larry Whitfill
> > > Cc: ccielab@groupstudy.com
> > > Subject: Re: Lab Tomorrow! Need Help
> > >
> > > Larry,
> > >
> > > I would suggest making the bridge priority
> 65535, the highest possible
> > > value.
> > >
> > > Good luck!
> > >
> > > -Bob
> > >
> > > ----- Original Message -----
> > > From: "Larry Whitfill" <whitfill@cox.net>
> > > To: <ccielab@groupstudy.com>
> > > Sent: Sunday, April 07, 2002 5:43 PM
> > > Subject: Lab Tomorrow! Need Help
> > >
> > >
> > > > Hello fellow CCIE waqnnabes and accomplished
> CCIEs!
> > > >
> > > > I'm sittingin my hotel 13 hours from ground
> zero and needed some
> > > > clarification and help.
> > > >
> > > > 1. When one wants to ensure that his switch
> does not become root under
> > > any
> > > > circumstance does he set the bridge priority
> to 0, does he set the
> > > priority
> > > > to the highest possible value, or does he do
> someting entirely
> > > different.
> > > > This has been kicked around quite a bit, but I
> never found a
> > > difinitive
> > > > answer here or on CCO, books, etc., and don't
> have two CATs to test.
> > > >
> > > > 2. When using DLSW+ peer-on-demand, do I also
> have to configure a
> > > border
> > > > peer, use the promiscuous keyword, both or
> neither?
> > > >
> > > > Thanks in advance!
> > > >
> > > > Larry
> > > >
>
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