Re: VTP question

First thing it looks is domain-name .

If domain name is same ; and conf revision is higher ; it doesnt matter if
switch is server or client ..... It will for sure over-write the
configuration of vlan database .

Thnx
Gaurav Madan

On Fri, Sep 30, 2011 at 5:28 PM, Kgabo Seopa <kgabo.seopa_at_gmail.com> wrote:

> It is quite confusing. When you looking at the link below:
>
>
>
> http://www.cisco.com/en/US/partner/tech/tk389/tk689/technologies_tech_note09186a0080094c52.shtml#ustand
> Summary Advertisements
>
> By default, Catalyst switches issue summary advertisements in five-minute
> increments. Summary advertisements inform adjacent Catalysts of the current
> VTP domain name and the configuration revision number.
>
> *When the switch receives a summary advertisement packet, the switch
> compares the VTP domain name to its own VTP domain name. If the name is
> different, the switch simply ignores the packet. If the name is the same,
> the switch then compares the configuration revision to its own revision. If
> its own configuration revision is higher or equal, the packet is ignored.
> If
> it is lower, an advertisement request is sent.*
>
>
> Regards,
>
> KG
>
> On Fri, Sep 30, 2011 at 12:24 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar
> >wrote:
>
> > I guess it depends on the VTP version ?
> > And on which client is involved. old CAT switches could never do such
> > thing because clients had no memory :)
> >
> > -Carlos
> >
> > Piotr Matusiak @ 30/09/2011 06:20 -0300 dixit:
> >
> >> Switch in VTP Client mode can overwrite Server's VLAN database.
> >>
> >> Check this out:
> >> http://www.cisco.com/en/US/**partner/tech/tk389/tk689/**
> >> technologies_tech_note091<
> http://www.cisco.com/en/US/partner/tech/tk389/tk689/technologies_tech_note091
> >
> >> 86a0080890613.shtml#topic7
> >>
> >> and this if you have CCO account:
> >> http://www.cisco.com/warp/**customer/473/vtp_flash/<
> http://www.cisco.com/warp/customer/473/vtp_flash/>
> >>
> >> Regards,
> >> --
> >> Piotr Matusiak
> >> CCIE #19860 (R&S, Security), CCSI #33705
> >> Technical Instructor
> >> website: www.MicronicsTraining.com <http://www.micronicstraining.
> **com/<http://www.micronicstraining.com/>
> >> >
> >>
> >> blog: www.ccie1.com
> >>
> >> If you can't explain it simply, you don't understand it well enough -
> >> Albert Einstein
> >>
> >>
> >> 2011/9/30 Kgabo Seopa <kgabo.seopa_at_gmail.com>
> >>
> >> Hi,
> >>>
> >>> I stand to differ.
> >>>
> >>> If a new switch has been introduced into the domain with a client mode,
> >>> it
> >>> will never corrupt the domain at all.
> >>>
> >>> The reason is, when in client mode
> >>>
> >>> (1) It does not generate the summary advertisements for every time
> period
> >>> (5
> >>> min) - so, its reversion number will not be known on the domain
> >>> (2) When the switch receives a lower configuration reversion number
> >>> compared
> >>> to its current, it simply ignore and drop the packet - thus, without
> >>> forwarding it to any trunk on the domain.
> >>>
> >>> How will it then corrupt the domain.
> >>>
> >>> Regards,
> >>> KG
> >>> CCIE#30089
> >>>
> >>> On Fri, Sep 30, 2011 at 2:20 AM, Marko Milivojevic <
> markom_at_ipexpert.com
> >>>
> >>>> wrote:
> >>>> Yes, unless passwords are different.
> >>>>
> >>>>
> >>>> --
> >>>> Marko Milivojevic - CCIE #18427 (SP R&S)
> >>>> Senior Technical Instructor - IPexpert
> >>>>
> >>>> On Wed, Sep 28, 2011 at 23:27, Nick Jay <wanttobeccde_at_yahoo.com>
> wrote:
> >>>>
> >>>>> If a new switch is added in a network, With higher revision
> number,same
> >>>>>
> >>>> domain
> >>>>
> >>>>> name but in "CLIENT" mode.. Will it harm the network by flushing the
> >>>>>
> >>>> vlan
> >>>
> >>>> information of the existing network?
> >>>>>
> >>>>>
> >>>>> Blogs and organic groups at http://www.ccie.net
> >>>>>
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> >>
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> >>
> >>
> >>
> >>
> >>
> >>
> > --
> > Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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Received on Fri Sep 30 2011 - 17:53:29 ART