From: Feldman, Jim (Jim.Feldman@amex.com)
Date: Fri Oct 28 2005 - 11:10:28 GMT-3
Thanks Leigh.
Do you know if the show vtp pass command works on the 3550? It's not in the
command ref and I never tried it.
Jim
-----Original Message-----
From: Leigh Harrison [mailto:ccileigh@gmail.com]
Sent: Wednesday, October 26, 2005 10:03 AM
To: Feldman, Jim
Cc: Guyler, Rik; ccielab@groupstudy.com
Subject: Re: VTP table revision
Jim,
Just had a pop:-
User Access Verification
Password:
sw2#sh vtp pass
The VTP password is not configured.
sw2#
sw2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
sw2(config)#vtp pass cisco
Setting device VLAN database password to cisco
sw2(config)#^Z
sw2#
sw2#sh vtp pass
VTP Password: cisco
sw2#
sw2#sh ver
Cisco IOS Software, C3750 Software (C3750-ADVIPSERVICESK9-M), Version
12.2(25)SEC, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Fri 15-Jul-05 02:03 by antonino
To be fair - I've only tried it on 3750's and 4500's - but they should
show you.
LH
Feldman, Jim wrote:
>Leigh,
>
>Actually, I think the output only shows the MD5 form of the password. I
>haven't tried it but I suspect using that form on the new switch wouldn't
>work.
>
>Do you know differently?
>
>And, speaking of VTP passwords, is there a password procedure if that
>password is forgotten?
>
>Jim
>
>-----Original Message-----
>From: Leigh Harrison [mailto:ccileigh@gmail.com]
>Sent: Wednesday, October 26, 2005 8:40 AM
>To: Guyler, Rik
>Cc: ccielab@groupstudy.com
>Subject: Re: VTP table revision
>
>
>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
>>
>>_______________________________________________________________________
>>Subscription information may be found at:
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>>
>>
>>
>>
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>>_______________________________________________________________________
>>Subscription information may be found at:
>>http://www.groupstudy.com/list/CCIELab.html
>>
>>_______________________________________________________________________
>>Subscription information may be found at:
>>http://www.groupstudy.com/list/CCIELab.html
>>
>>
>
>_______________________________________________________________________
>Subscription information may be found at:
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