[nsp] VLAN database propagation

[Alexandre Snarskii]

On Thu, Mar 18, 2004 at 10:22:32PM +0100, Gert Doering wrote:
> Hi,
> 
> On Thu, Mar 18, 2004 at 09:46:27AM -0500, Warren Kumari wrote:
> > <rant>
> > I have made a whole bunch of feature requests asking that the default 
> > mode be changed to transparent, but apparently Cisco believes 
> > plug-and-play is more important than reliability. How many people on 
> > the list have had someone plug in an old / test switch that has a 
> > higher VLAN version number than their production switches and lost all 
> > of their VLANs because of this?
> 
> Yep.  Had one of the old switches for testing, deleted all the VLANs on it
> (due to "cleanup config, no need to keep around") - later reconnected it
> to the production network, VLAN database serial number higher than on the
> other ones -> boom, network dead.

Cleanup of catalyst vlans should be performed in the easiest form: 

cat#delete flash:vlan.dat

which also cleans out vtp domain and vtp revision, so, now you 
can safe plug this switch into any of your vtp-domains.

> Overall I *do* like VTP, because it's so convenient, but you need to make
> sure that the number of people that connect and configure new VTP members
> is small, and that all those people know what they are doing.

Agreed. Personally I have not experienced any such problems in the
past years..