[c-nsp] Lot of input errors on a NPE-G1 interface

[Matlock, Kenneth L]

True, if a portfast port bounces it doesn't trigger a TCN, which then
doesn't trigger CAM table flushes.

Ken Matlock
Network Analyst
303-467-4671
matlockk at exempla.org




-----Original Message-----
From: Gert Doering [mailto:gert at greenie.muc.de] 
Sent: Wednesday, May 23, 2012 2:25 PM
To: Matlock, Kenneth L
Cc: Chris Gotstein; Gert Doering; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Lot of input errors on a NPE-G1 interface

Hi,

On Wed, May 23, 2012 at 02:04:58PM -0600, Matlock, Kenneth L wrote:
> Think of it this way. What does Portfast do? It allows you to skip 
> from blocking to forwarding, bypassing listening and learning states.

Plus, it changes TCN behaviour for rapid-pvstp for flaps on that port.

That's one of the often-overlooked side effects.

gert
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