Re: covergence in RSTP

Hi Shekhar,

As Brian has mentioned, in non-cisco environment the command is "edge".

The command would be:-

*set protocols rstp interface ge-0/0/1 edge*

HTH.

Cheers,
Nicky

On Mon, Jun 25, 2012 at 8:52 PM, shekhar sharma
<shekhar.sharma21_at_gmail.com>wrote:

> Hi brian,
>
> Agreed on that part......
>
> But my doubt is how things will work in non-cisco environment e.g juniper
> ,HP etc...
>
> Is this vendors have alternate command....or edge ports will still suffer.
> from time dealy...........................................
> I m sorry but nt have any expereince with non-cisco swithes....just want to
> understand the protocol from deep....as how RSTP behaves for access
> ports.... in general...
>
>
> regards,
> Shekhar
> On Mon, Jun 25, 2012 at 6:54 PM, Brian McGahan <bmcgahan_at_ine.com> wrote:
>
> > Hi Shekhar,
> >
> > It's technically not portfast, its configuring the link as an edge port.
> > In Catalyst IOS when you're running RSTP the links don't run as edge
> ports
> > automatically. Instead of adding a "spanning-tree edge" or similar
> > command, they simply made the "spanning-tree portfast" command do the
> same
> > thing. The idea is that if you're migrating from legacy PVST to Rapid
> PVST
> > or to MST, your ports that used to be portfast ports now become edge
> ports.
> > They basically do the same thing, but in RSTP they're called edge ports
> > instead of portfast ports.
> >
> >
> > HTH,
> >
> > Brian McGahan, CCIE #8593 (R&S/SP/Security)
> > bmcgahan_at_INE.com
> >
> > Internetwork Expert, Inc.
> > http://www.INE.com
> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> > Bruno Silva
> > Sent: Monday, June 25, 2012 9:36 AM
> > To: shekhar sharma
> > Cc: Cisco certification
> > Subject: Re: covergence in RSTP
> >
> > you will still have to use portfast even with RSTP due to standard
> > specifications.
> >
> > On Mon, Jun 25, 2012 at 9:49 AM, shekhar sharma
> > <shekhar.sharma21_at_gmail.com>wrote:
> >
> > > Hi Experts ,
> > >
> > > I know RSTP is mush faster than legacy STP or PVST because of its
> > > alternate ,,,back ports & a different algorithm to achive faster
> > > convergence in the interswitch links & uplinks.
> > >
> > > But I am little confused about its behaviour for edge ports i.e access
> > > ports.
> > >
> > > Yesterday I have done some tests ,,,.Observation is without enablings
> > > portfast on acess ports ,if I am doing shut/noshut on that accessport
> > > interface. convergence is slow and I am getting 10 packet drops b/w
> > > the pings.
> > >
> > > But with portfast enabled , convergence is faster and my gettig 2-3
> > > packet drop.
> > >
> > > So, the question is if portfast is still required in RSTP ,then how
> > > will we utilize its use in non-cisco environment .since portfast is
> > > cisco propriteiry.....
> > >
> > > Thanks,
> > > Shekhar
> > >
> > >
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Received on Tue Jun 26 2012 - 19:59:01 ART