[c-nsp] dot1q-tunneling

[sthaug at nethelp.no]

> Coming from Extreme to Cisco, I prefer the Extreme way because it gives 
> more control. I have noticed people used to Cisco coming to Extreme having 
> the totally opposite view, they like the flexibility Cisco gives. Otoh 
> we've more and more started to configure "switchport trunk allow vlan" to 
> get this control, which makes it all even between the brands. With the 
> added risk when it comes to cisco if you want to add a vlan to a trunkport 
> and you forget the "add" statement, and hose all the other vlans on that 
> trunkport.

Either way is okay, as long as you configure your Cisco ports by default
to "allowed vlan none". The *Cisco* default of trying to negotiate a
trunk port and then having all VLANs allowed is absolutely awful in a
service provider environment.

But we have been bitten by forgetting the "add" statement too...

Steinar Haug, Nethelp consulting, sthaug at nethelp.no