Re: BGP COMMUNITY DOUBT!!!

Well, this is not the typical question that I always get; almost all CCIE
candidates want to know the difference between local-as and no-export...this
one seems like a new request :)

As you see here:
http://www.cisco.com/en/US/tech/tk365/technologies_q_and_a_item09186a00800949e8.shtml#three

We usually use the Local-as community in confederation scenarios where you
want to confine a route within a local AS (i.e. it should not leave the
local sub-AS). On the other hand the Internet one simply means "let it go!"
; advertise this route to the internet community, and any router that
belongs to it (loosely all routers).

HTH

Kambiz Agahian

CCIE Instructor/Consultant
CCIE# 25341, CCSI# 33326, MCSE, MCSA

On Thu, Jul 15, 2010 at 9:27 AM, Nish Vamadevan <ipnish_at_gmail.com> wrote:

That's what I've came across and I'm pretty sure... someone can confirm it?
>
> Thanks!
>
> Regards,
> Nish
>
> Sent from my BlackBerry. wireless device
>
> -----Original Message-----
> From: CCIE KID <eliteccie_at_gmail.com>
> Date: Thu, 15 Jul 2010 21:55:23
> To: Nish Vamadevan<ipnish_at_gmail.com>
> Cc: Cisco certification<ccielab_at_groupstudy.com>
> Subject: Re: BGP COMMUNITY DOUBT!!!
>
> *no-export* : This will keep the route inside the confederation, but not to
> any peers.
>
> *local-as* : This will keep the route inside the AS, but not even to
> confederation peers.
>
> no-export > local-as > no-advertise
>
> If there is no confederation present, no-export will reflect the same
> result
> as local-as.
>
>
> is this right????
>
>
>
> On Thu, Jul 15, 2010 at 9:53 PM, Nish Vamadevan <ipnish_at_gmail.com> wrote:
>
> > Also take a look at something I came across a while back...
> >
> > http://www.fnode.com/2009/07/bgp-no-export-vs-local-as/
> >
> > Regards,
> > Nish
> >
> > On 15 Jul 2010, at 17:20, "Nish Vamadevan" <ipnish_at_gmail.com> wrote:
> >
> > > If there is no confederation present in the design, no-export will
> > reflect the same result at local-as.
> > >
> > > Regards,
> > > Nish
> > >
> > > Sent from my BlackBerry. wireless device
> > >
> > > -----Original Message-----
> > > From: Ryan DeBerry <rdeberry_at_gmail.com>
> > > Sender: nobody_at_groupstudy.com
> > > Date: Thu, 15 Jul 2010 12:16:23
> > > To: Adrian Brayton<abrayton_at_gmail.com>
> > > Reply-To: Ryan DeBerry <rdeberry_at_gmail.com>
> > > Cc: CCIE KID<eliteccie_at_gmail.com>; Cisco certification<
> > ccielab_at_groupstudy.com>
> > > Subject: Re: BGP COMMUNITY DOUBT!!!
> > >
> > > No-export - does not advertise to any EBGP peer
> > >
> > > no-advertise - "tells the router not to advertise it anyone"
> > >
> > >
> > >
> > > On Thu, Jul 15, 2010 at 12:11 PM, Adrian Brayton <abrayton_at_gmail.com>
> > wrote:
> > >
> > >> The BGP community INTERNET allows the prefixes to be advertised to the
> > >> "Internet" or external AS. The LOCAL AS keeps the prefixes local to
> the
> > AS
> > >> and
> > >> then NO_EXPORT tells the router not to advertise it anyone.
> > >>
> > >>
> > >> On Jul 15, 2010, at 12:04 PM, CCIE KID wrote:
> > >>
> > >>> pls buddy i need sum kind of clear cut explnation..
> > >>>
> > >>> On Thu, Jul 15, 2010 at 9:31 PM, Adrian Brayton <abrayton_at_gmail.com>
> > >> wrote:
> > >>> The answer is in your question!
> > >>>
> > >>>
> > >>> On Jul 15, 2010, at 11:57 AM, CCIE KID wrote:
> > >>>
> > >>>> Can anyone tell me the difference between BGP COMMUNITY INTERNET AND
> > >> LOCAL
> > >>>> AS
> > >>>> I am getting really confused..???
> > >>>>
> > >>>> --
> > >>>> With Warmest Regards,
> > >>>>
> > >>>> CCIE KID
> > >>>> IN PURSUIT OF CCIE
> > >>>>
> > >>>>
> > >>>> Blogs and organic groups at http://www.ccie.net
> > >>>>
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> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>> --
> > >>> With Warmest Regards,
> > >>>
> > >>> CCIE KID
> > >>> IN PURSUIT OF CCIE
> > >>
> > >>
> > >> Blogs and organic groups at http://www.ccie.net
> > >>
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> > >
> > >
> > >
> > >
> > >
> >
>
>
>
> --
> With Warmest Regards,
>
> CCIE KID
> IN PURSUIT OF CCIE
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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Received on Thu Jul 15 2010 - 09:47:49 ART