From: Jo Johnson (groupstudyjo@gmail.com)
Date: Wed Nov 15 2006 - 23:10:14 ART
Hey,
Where did you get the sample lab? I can't find it on their site.
Thanks
Jo
On 11/15/06, Michael Zuo <mzuo@ixiacom.com> wrote:
>
> Hi Group,
>
>
>
> I ran into an issue with the new sample lab with 4 switches and am
> wondering if someone else has seen it or I've made a mistake somewhere:
>
>
>
> For the switching part, when all the trunk ports are set up, the links
> between SW3 and SW4 (port 19, 20) will go into blocking because spanning
> tree and trunk exists between SW1/SW2, SW1/SW4 and SW2/SW3. this means
> VTP will not work between SW3 and SW4 even though it is part of the
> requirement of section 1.1
>
>
>
> The catch is that even by adjusting port-priority and port-cost to make
> the trunks between SW3 and SW4 come up, it will bring down trunk links
> between another pair of switches. Because of the way the requirements
> are set up (only vlan 102 can traverse between SW1 and SW4), no other
> trunk links can be brought down without losing connectivity for at least
> one vlan.
>
>
>
> The only solution I can see is PVST which is not part of the solution.
>
>
>
> Am I missing something very simple or maybe there is another workaround?
>
>
>
>
>
> Please comment....
>
>
>
> Thanks a lot...
>
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