Re: vlan information in VTP modes

This is a passage from Odom's book...Hopefully this further clarifies:

"*VTP transparent mode switches essentially behave as if VTP does not exist,
other than one small exception: Transparent mode switches forward VTP
updates received from other switches, just to help out any neighboring VTP
server or client switches.

When VTP clients and servers store VLAN configurationspecifically, the VLAN
ID, VLAN name, and other VTP configuration settingsthe configuration is
stored in a file called vlan.dat in flash memory.
The filename is short for "VLAN database.") Even more interesting is the
fact that Cisco IOS does not put this VLAN configuration in the
running-config file or the startup-config file.
No command exists to view the VTP and VLAN configuration directly; instead,
you need to use several show commands to list the information about VLANs
and VTP output.

Switches in transparent mode store VLAN configuration in both the
running-config file as well as the vlan.dat file in flash. The
running-config can be saved to the startup-config as well*."

-Kamran

On Sat, Jun 13, 2009 at 7:06 PM, Anantha Subramanian Natarajan <
anantha.natarajan_at_gravitant.com> wrote:

> Hi CC13RS,
>
> oh I see, Thanks got it .
>
>
> Regards
> Anantha Subramanian Natarajan
>
> On Sat, Jun 13, 2009 at 9:01 PM, CCIE RS <cc13rs_at_gmail.com> wrote:
>
> > Just that when ur Switch is in VTP transparent mode any VLAN info is
> > actually written in Running config. if you Show Run u will see it there.
> >
> > v/s in VTP Server/Client mode the VLANs will themselves not show up in
> Show
> > run. They are in vlan.dat file on flash.
> >
> > Yes u have to do "wr mem" inorder to transfer the VLAN info ftom running
> > config to startup.
> > HTH,
> > -CC13RS.
>
>
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Received on Sat Jun 13 2009 - 19:16:18 ART