From: CCIE3000 (ccie3000@googlemail.com)
Date: Mon Jun 23 2008 - 13:01:12 ART
This is a little strange,
I haven't read the documents yet, that's my next step.
I've been trying some things on the switches.
I've got an ether channel between two switches running dot1q trunk across.
I've change the native vlan to vlan 3 then I only allow vlan 4 and 5 across
the trunk. Everything works.
I've tried it with vlan dot tag native and without, still okay.
I shall read the document and report back.
On 6/23/08, Nate Cielieska <ncielieska@gmail.com> wrote:
>
> That is a tricky one.. but not because of why you think.
>
> Vlan 1 being the native vlan only becomes an issue when you have untagged
> traffic. If everything is tagged (which it usually is in these scenarios)
> then your good. The bigger issue would be possible cdp/vtp/pagp control
> channel issues with blocking vlan 1. Alot of those protocols have their
> hooks into Vlan 1 for communication. In older switches you didn't even have
> the option to prune vlan 1.
>
> Regards,
> Nate
>
> On Mon, Jun 23, 2008 at 10:46 AM, CCIE3000 <ccie3000@googlemail.com>
> wrote:
>
>> Hi Guys,
>>
>> If you have a question that states to only allow the necessary vlans
>> across
>> the trunk and the native vlan is vlan 1 would you permit vlan 1 as well as
>> the other necessary vlan's?
>>
>> I'm just about to play on the switches now but I thought I'd throw it up
>> for
>> discussion.
>>
>> Cheers.
>>
>>
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