[c-nsp] VTP in IOS config

MADMAN david.madland at qwest.com
Mon Feb 14 16:43:32 EST 2005



Tim Stevenson wrote:

> The VLAN database is not phased out, the vlan-database config mode is 
> what has been phased out.
> 
> In VTP client & server mode, the VLAN/VTP domain info is still stored in 
> a separate vlan.dat file, but you now use normal config mode to modify 
> this configuration. Why? Because VTP requires instant NVRAM changes 
> based on the contents of VTP packets - this is in direct opposition to 
> the traditional IOS model, where NVRAM doesn't change unless you tell it 
> to (wr mem/copy run start).
> 
> In VTP transp mode, you also use normal config mode to modify the 
> config, and it your config is also stored in the normal config file 
> (running/startup), since VTP transparent switches do not modify their 
> config based on external packet reception.

   Thanks Tim for the info.

   Dave

> 
> Tim
> 
> At 01:00 PM 2/14/2005, MADMAN averred:
> 
>>    Setting up a 4507R with supIVs running 12.2.25(ESW) the other day.
>> After adding the config I was explaining the various parameters to the
>> customer but I didn't notice any vtp info, vtp was client and had the
>> customers choosen domain name.  I then changed the mode to transparent
>> and then in the running config I noticed the vtp mode and the domain!
>> Switch config to server and the info was no longer in the config file.
>> Seems that if you configure the vtp for client or server neither will
>> show up in the config, nor will the domain name.  Change it to
>> transparent and you see the mode and the domain which is basically
>> irrelevant since the domain is meaningless with vtp disabled.
>>
>>    I tried this on another 4507 in the lab running earlier IOS and on a
>> 6506 sup1msfc2 and a sup720, same results.
>>
>>    Is this by accident or design?  If design why?  I know this used to
>> be done and held in the VLAN database but support for it is being phased
>> out.
>>
>>    Thanks
>>
>>    Dave
>> -- 
>> David Madland
>> CCIE# 2016
>> Sr. Network Engineer
>> Qwest Communications
>> 612-664-3367
>>
>> "Emotion should reflect reason not guide it"
>>
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> 
> 
> 
> 
> Tim Stevenson, tstevens at cisco.com
> Routing & Switching CCIE #5561
> Technical Marketing Engineer, Catalyst 6500
> Cisco Systems, http://www.cisco.com
> IP Phone: 408-526-6759
> ********************************************************
> The contents of this message may be *Cisco Confidential*
> and are intended for the specified recipients only.
> 

-- 
David Madland
CCIE# 2016
Sr. Network Engineer
Qwest Communications
612-664-3367

"Emotion should reflect reason not guide it"


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