Re: IERS Lab4 Task1.3 - Loopguard and UDLD

Thanks for this link.. mis-wiring is new to me :) so much to learn in this
short period of life.

Thanks again.

On Sun, Jan 24, 2010 at 8:08 PM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> Hello,
>
> UDLD and loopguard are essentially two ways to solve the same problem
> using different methods. Like Nadeem said, UDLD physically detects
> the uni-directional links, whereas loopguard is more geared towards
> STP specifically. Typically you will deploy one or the other. You
> may want to check out the following link which does a nice comparison
> : )
>
>
> http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a0080094640.shtml#loop_guard_vs_uld
>
> On Sun, Jan 24, 2010 at 7:05 AM, Michael McFarlin
> <router.genie_at_gmail.com> wrote:
> > Experts,
> >
> > I have a question about UDLD and Loopguard in one of the IERS labs. I
> don't
> > think that loopguard is needed at all here. Why would you have to worry
> > about SW1 making the Fa0/15 a designated port if UDLD has already taken
> the
> > port down? By default UDLD acts faster than Loopguard by default right?
> >
> >
> > Task
> >
> > Administrators of your network are concerned about SW1 and SW2 not
> > being able to detect a link failure on port Fa0/15.
> >
> > Configure SW1 and SW2 so that port Fa0/15 is brought down in the case
> > that either switch can send traffic, but not receive, or vice versa.
> >
> > As an additional precaution, configure SW1 so that interface Fa0/15 is
> not
> > mistakenly elected as a designated port in the above case.
> >
> > Answer
> >
> > SW1:
> > interface FastEthernet0/15
> > udld port aggressive
> > spanning-tree guard loop
> > SW2:
> > interface FastEthernet0/15
> > udld port aggressive
> >
> >
> > -Mike
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
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> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
> --
> Regards,
>
> Joe Astorino CCIE #24347 (R&S)
> Sr. Technical Instructor - IPexpert
> Mailto: jastorino_at_ipexpert.com
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Blogs and organic groups at http://www.ccie.net
Received on Sun Jan 24 2010 - 20:16:10 ART