[c-nsp] Switch mac address appearing in a VLAN going through it

Gert Doering gert at greenie.muc.de
Wed Dec 14 14:27:01 EST 2005


Hi,

On Wed, Dec 14, 2005 at 08:02:11PM +0200, Saku Ytti wrote:
> On (2005-12-14 18:51 +0100), Gert Doering wrote:
> 
> > Actually, portfast will not turn off STP, it will just modify it (telling 
> > rapid-stp that this is an edge-port, and turn off the "listening/learning"
> > phases of normal STP).  If you build a loop via two portfast-enabled ports, 
> > the switch will still shut down the port, but only after a few seconds - 
> > in the mean time, you'll have a loop.
> 
>  I thought that it doesn't turn off anything, just travel to forwarding
> immediately in classical STP and in RST give upstream permission to 
> move to forward immediately. And that all this would be reverted
> to normal behaviour upon receiving BPDU.

Well, that's about what I wanted to say :-)

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
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