Issue with Aquiring DHCP

[Scott Mewett]

On Thu, 2004-06-10 at 07:06, Andy Ciordia wrote:
> Scott Mewett wrote:
> > Brians on the right track with regard to port-fast.
> > What you want to enable there is on a per port basis.
> > It's not a general spanning tree config.
> > I mention this because your earlier mail only showed some general
> > spanning tree settings.
> 
> > Kickstart then resets the interface, which make the interface leave the
> > bridge, and thus when it reconnects the switch port goes back to
> > blocking mode and goes through the cycle again.
> 
> You know I hadn't thought of that and I'll have to go back and look but 
> you're probably right.  If its flushing that port its going to take a 
> chunk of seconds before it accepts that link again.
> 
> > Also notice the warning it gave. So you don't want to plug in a switch
> > to that port or it could cause problems. To protect against that
> > versions of CatOS 5.4.1 have a feature called BPDU Guard. If you enable
> > this then the port will get disabled if it detects the device being
> > connected is running spanning tree. You can control how long it will
> > disable for as well.
> 
> Right now the machine thats being tested is hooked into the Cat5k but 
> the array I'm will be pushing the work to has 100unmanaged switch 
> connect into the 5k..  I'm curious if there will be a problem there.. 
> Since the Cat5k isn't opening a new port it might just breeze on 
> through.  That'd be refreshing ;)

That's what would happen. Since the uplink port on your unmanaged switch
does change state, the port wouldn't get shut down.
As a result the your kickstart should proceed along without stopping.

Scott

> 
> I need to develop my other KS's for the other roles in that rack and see 
> what happens.
> 
> And thanks go to Philip Rowlands as well. Nice to see that patch got 
> wrapped already into U2, I don't have an install tree for that atm but I 
> might consider it. :)
> 
> -a
> 
> 
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