Re: Can you make a root port a designated port?

From: LJ (lj@2u2.nu)
Date: Wed Jul 09 2008 - 14:14:36 ART


OK, what about this.. you make the trunk port asymmetrical.. dot1q tunnel :)
than make it exit in the segment where it will be the designated port for it is
the root port tunneled... ouch..

On Wed, 9 Jul 2008 11:09:42 -0600
  "John" <jgarrison1@austin.rr.com> wrote:
: Exactly!!! the task is to make the trunk port f0/14 a designated port. The problem is that f0/14 is a root port.
: There are 2 other ports connected to the root f0/13 and f0/15. If I change the cost all I'm doing is possibly
:making another port the root port and putting f0/14 into altn blocking state. Even if I make f0/13 or f0/15 the root
:port(I would have to make them trunks which was not asked for anywhere in the lab). I can't make f0/14 a designated
:port, because that makes a loop and STP won't allow that. The SG is wrong wrong wrong, and I was trying to find out
:if there is some "exotic" way to accomplish the task.
: ----- Original Message ----- From: "LJ" <lj@2u2.nu>
: To: "John" <jgarrison1@austin.rr.com>
: Cc: <ccielab@groupstudy.com>
: Sent: Wednesday, July 09, 2008 10:46 AM
: Subject: Re: Can you make a root port a designated port?
:
:
:>A designated port points the opposite direction than a root port.
:> While a root port points towards the root a designated port points
:> downstream away from the root.
:>
:> To make a port designated you have port cost and port priority.
:>
:> I can't fully follow you.. Can you paste the whole task here?
:>
:> On Wed, 9 Jul 2008 10:23:12 -0600
:> "John" <jgarrison1@austin.rr.com> wrote:
:> : I have a switch with 3 connections to another switch that is the root.
:> One of
:> : the connections is a dot1q trunk. I'm tasked with making it a
:> designated
:> : port. I have tried a number of configurations and I've come to realize
:> that I
:> : cant make it designated because that would mean that one of the other
:> ports
:> : has to become root. If I could then make make the port designated I
:> have a
:> : loop.
:> : : Ports going to the root can only have two states root forwarding or
:> altn
:> : blocking right?
:> : : Can anyone see a way to accomplish this? besides making my switch the
:> root?
:> : : :
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