From: Leigh Harrison (ccileigh@gmail.com)
Date: Wed Oct 26 2005 - 09:40:23 GMT-3
if you do forget the password,
"show vtp password" will tell you what it is.....
Guyler, Rik wrote:
>One way to avoid this ever really being a problem is to use VTP passwords.
>When I was a consultant I often did this for customers that I knew would try
>to add their own switches without knowing the ramifications of doing so.
>The password protected the existing VTP domain and forced the switch
>installer to manually configure the VTP info, which usually was me after
>they couldn't get it to work. Of course, don't forget the password...that
>could be a problem. ;-)
>
>Rik
>
>-----Original Message-----
>From: Feldman, Jim [mailto:Jim.Feldman@amex.com]
>Sent: Tuesday, October 25, 2005 1:17 PM
>To: 'Thomwin Chen'; Ccie Lab (E-mail)
>Subject: RE: VTP table revision
>
>Thanks for the info. I still have to make sure I know how VTP decides which
>is the most up to date config based on table revision number.
>
>I think the issue arises if a switch is added to an existing VTP domain but
>it has a higher table revision than the current VTP server but this
>shouldn't happen as long as the new switch being added has a factory default
>setting but I need to verify that.
>
>Jim
>
>-----Original Message-----
>From: Thomwin Chen [mailto:thomwin_chen@yahoo.com]
>Sent: Tuesday, October 25, 2005 11:11 AM
>To: Feldman, Jim
>Subject: RE: VTP table revision
>
>
>adding several VLAN by using only one line, will only increment the VTP
>revision +1 (that's from 1 to 2).
>
>Rgds
>
>"Feldman, Jim" <Jim.Feldman@amex.com> wrote:
>
>Hey Thomwin,
>
>Thanks for getting back to me. I appreciate it.
>
>With respect to your first point, do you know the affect on the table #
>from, for example, adding several vlans at once as in:
>
>vlan 10,20,30
>
>Will the table # change from 1 to 4 or from 1 to 2?
>
>Thanks again
>
>-----Original Message-----
>From: Thomwin Chen [mailto:thomwin_chen@yahoo.com]
>Sent: Tuesday, October 25, 2005 11:01 AM
>To: Feldman, Jim
>Subject: Re: VTP table revision
>
>
>I'm not remember it well
>
>however,
>for your number 2 question :
>1. adding, deleting, renaming VLAN will change the VTP revision number.
>2. changing VTP domain name will reset the VTP revision back to 0.
>3. changing from Server/Client mode to Transparent mode will reset the VTP
>revision back to 0.
>
>Rgds,
>Thomwin
>
>
>
>"Feldman, Jim" <Jim.Feldman@amex.com> wrote:
>
>Hi guys,
>
>I know one has to be very careful when adding a new switch (with the default
>VTP server mode) to an existing switched VTP network because if the new
>switch has the wrong table revision #, it could wipe out or replace all the
>existing vlans. ( I rmember that much but forget some of the details).
>
>This has me thinking about a couple things:
>
>1. Do I want to make sure the VTP table revision # on the new switch is
>lower or higher than existing VTP servers?
>
>2. What specific changes cause the VTP table revision to change?
>
>
>For example, does changes the properties of a vlan eg. mtu, cause a VTP
>table # revision? Does adding and deleting a vlan cause the table # to also
>change? Are all changes done between VTP advertisements counted as 1 table
>revision?
>
>I'd appreciate any guidance that can be offered here.
>TIA, Jim
>
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