Re: Portfast in Trunk port

Just watch out for BPDU Guard in conjunction with portfast trunks ;)

-SL

On Fri, May 4, 2012 at 2:13 PM, Anthony Sequeira
<terry.francona_at_gmail.com>wrote:

> Perhaps worth pointing out as well - in the Lab Exam environment, we
> configure whatever the hell they tell us to configure, no matter how silly
> or against best practices.
>
> On May 4, 2012, at 2:00 PM, Anthony Sequeira wrote:
>
> > I am pretty sure this could be beneficial in a router on a stick
> scenario. So that of course begs the question - who the ^%&$ would do that
> in production.
> >
> > This could also be used in a situation where you have a VMware ESX host
> that is trunking multiple VLANs to the Catalyst Switch.
> >
> > Cisco does indeed caution against using this feature between two
> switches in your infrastructure.
> >
> > Anthony Sequeira
> > http://www.stormwind.com
> > Twitter: @compsolv
> > Facebook: http://www.facebook.com/compsolv
> >
> > On May 4, 2012, at 1:37 PM, CCIE KID wrote:
> >
> >> Hi all
> >>
> >> I have a doubt in enabling Portfast in trunk port. My customer config
> has
> >> enabled Portfast in trunk port and i have no idea why we should enable
> it
> >> on trunk port and hat use it has. Yes Portfast is used for Host
> connected
> >> ports and it virtually doesn't go thru the STP port states such
> listening
> >> and learning and thereby goes to forwarding directly and also if there
> is
> >> any change in port status such as removing the PC or server or any other
> >> device, TCN BPDUs will not be generated. THis is the function of
> Portfast.
> >> So why would u enable Portfast on Trunk ports.
> >>
> >> So if the trunk port goes down, TCN BPDU won't be generated for that
> >> particular trunk port , and so the STP convergence will be affected with
> >> this ?
> >> Any thoughts on this ?
> >>
> >> Need experts advice on this ? Why do they do purposefully in real time
> ..
> >> Any reasons behind it
> >>
> >>
> >>
> >> --
> >> With Warmest Regards,
> >>
> >> CCIE KID
> >> CCIE#29992 (Security)
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >>
> >> _______________________________________________________________________
> >> Subscription information may be found at:
> >> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri May 04 2012 - 14:36:06 ART