From: Feldman, Jim (Jim.Feldman@amex.com)
Date: Tue Oct 25 2005 - 14:17:18 GMT-3
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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