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Re: Re: VLAN 1, if not used, is safe to shutdown (trunk disallow) always ? posted 12/27/2006
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Are you performing a debug yourself as well to
validate your findings?

You may find this technique both helpful and
educational if not.

Recently, I've been finding things that say one thing
in some parts of CCO but the truth by debug may be a
different matter.

You probably are already, but just in case.

Happy Holidays!

--- johngibson1541@xxxxxxxxx wrote:

> It looks like in Cisco PVSTP+ it sends BPDUs with
> tags and without tags (duplicate packets).
> So, when all switches are Cisco it is pretty safe to
> disallow vlan 1, if STP is in concern.
> Next question is if it is still safe with MSTP.
> John
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