[c-nsp] NATIVE_VLAN_MISMATCH

[Oliver Eyre]

This is to an external entities switch mind you, so I don't especially see
why you need to be exchanging any of this information.

OP, I suggest the following to ensure you don't get any surprise VLAN DB
changes or strange messages.

Enable:
-BPDU Filter
-switchport nonegotiate

Disable:
-CDP

Change:
-VTP domain and password
-VTP mode to transparent (if you don't need it yourself)

Oliver

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mark
Sent: Thursday, 3 June 2010 11:00 AM
To: Jan Gregor
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] NATIVE_VLAN_MISMATCH

or just correct the native vlans?


On 02-Jun-2010, at 8:59 PM, Jan Gregor wrote:

> Made my day :). CCNA, doing it wrong :).
> BTW, letting CDP turned on towards the customer is really the way to get
> your logs pretty large pretty fast when you bump into a bad guy.
> 
> 
> Jan
> 
> On 06/02/2010 06:37 AM, Octavio Alvarez wrote:
>> On Fri, 28 May 2010 16:41:16 -0700, Rick Kunkel <kunkel at w-link.net>
wrote:
>> 
>>> I've connected a switch of mine to a provider's switch, and I'm
>>> getting CDP-4-NATIVE_VLAN_MISMATCH warnings...  but everything works
>>> fine.
>>> 
>>> Is this just a harmless warning?  I'm not doing any VLANs with them.
>>> Their connection is going into a 3550 that has just had the nvram
>>> erased and NO setup done, so it's ridiculously stock.
>> 
>> I would try setting both switches to different VTP domains.
>> 
> 
> 
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