[nsp] VLAN database propagation

[Warren Kumari]

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Great, so it is not just me that thinks VTP is evil!

<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?

Yes, our standard template does have "vtp transparent" in it (I have 
surrounded it with comments promising GBH to anyone who misses the 
line), but there is always someone who misses it, doesn't apply the 
template because it is "just temporary".

</rant>

Warren.

On Mar 18, 2004, at 9:16 AM, Dustin Mitchell wrote:

> On Thu, Mar 18, 2004 at 03:09:03PM +0200, Adrian Pirciu wrote:
>> It's VTP ( VLAN Trunk Protocol)
>
> And on that note I might add that if you don't need VTP (not too many
> switches and/or fairly static VLAN topology), turn it off -- put all of
> the switches in transparent mode.
>
> VTP is an interesting idea, but unfortunately it's so automatic that
> it's very easy to slag your network with it.  In addition to the
> warnings in the Cisco documents others have cited, I can vouch from
> personal experience that changing the VTP domain name on one switch can
> cause all switches to stop forwarding packets.  That's no fun.
>
> I have a question related to that -- is it possible to back up a
> switch's VLAN configs in a manner similar to backing up its IOS
> config?
>
> Dustin
>
> -- 
> # Dustin Mitchell
> # dustin at ywlcs.org/djmitche at alumni.uchicago.edu
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>
>
- - -- Never criticize a man till you've walked a mile in his 
shoes.  Then if he didn't like what you've said, he's a mile away and 
barefoot.

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