STP and VTP question

[sathyasav]

Hello,

can any one clear my below doubts,

1)Does STP(or PVST,or PVST+) enabled default on the switches.If yes then how can we disable it(just to know about this)

2)Does VTP enabled default on switches if yes then how to disable it.

Please reply ASAP.

Thanks,

sathya

[andrew.prince · Accepted solution]

1) Yes - you can disable it per switch port or per vlan = globally

2) Yes - you cannot turn it off, just set it to transparent mode.

[sathyasav]

Hi Andrew,

i didnt understand the below thing which you mentined.

1) Yes - you can disable it per switch port or per vlan = globally

so you mean that we can disable it per vlan or per interface which is equal to globally disabling or

we can disable it it per vlan or per interface in global configuration mode.

please tell me which one is right and if it is possible then post the command which we use to disable it.

[andrew.prince · Accepted solution]

If you disable it per VLAN - this is the same as globally, as that switch will no longer participate for that VLAN.

Before any commands are configured - why do you think you need to disable it? As there are other features available

[Joseph W. Doherty]

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Posting

"2) Yes - you cannot turn it off, just set it to transparent mode."

NB: Later IOS versions support VTP mode off.

[sathyasav]

No I just want to know how to disablel it(to know something more than defualt configuration )..

Thanks Andrew...

[Joseph W. Doherty]

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

If "off" is supported, it fully disables it.  Transparent mode can pass VTP along from one switch to another, although the transit switch won't use the VTP information.

[sathyasav]

Hi joseph,

In what IOS versions that feature is available?(VTP mode off).If we disable it using this command then the switch will be in transparent mode or no mode(blank mode)?

[Joseph W. Doherty]

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

Not sure - this can be a "student exercise"