From: keith tokash (ktokash@hotmail.com)
Date: Thu Jun 05 2008 - 15:23:09 ART
With a quick pointer I found a little lab in Narbik's Bootcamp workbook on
cost communities (Disclaimer: no one is paying me to say that, and IE's books,
which I'm also using, may have them in there too and I forgot and didn't find
it this morning). Turns out they're pretty easy, but sneaky in that they
don't show up in a "show ip bgp" output. Also, they aren't accounted for in
the attribute list I quoted a couple of hours ago from Odom's CCIE prep guide
- that lists doesn't account for tie-breakers or cost communities. Still a
solid list though, we just have to remember how cost communities work and how
ties are broken.
The config guide for cost communities is pretty readable. I guess it has
moved into the "tricks I'm ready for and hope I get now" category. Well,
maybe not yet, but it's on the way there.
http://www.cisco.com/en/US/docs/ios/iproute/configuration/guide/irp_bgp_cost_
comm_ps6350_TSD_Products_Configuration_Guide_Chapter.html
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> Date: Thu, 5 Jun 2008 23:28:40 +0530
> From: wish2ie@gmail.com
> To: ktokash@hotmail.com
> Subject: Re: Cost communities
> CC: ccielab@groupstudy.com; narbikk@gmail.com
>
> Yeah,
>
> BGP Link-BW is indeed providing a nice solution.
> Cost community is used by default in some MPLS VPN solution as an MP-BGP
> extension to get the desired behaviors for the pe-ce IGP.
>
>
> But for Exam, I guess not now.
> And it's good, as already we have enough !!!
>
> Regards,
> Dara
>
> On Thu, Jun 5, 2008 at 10:21 PM, keith tokash <ktokash@hotmail.com> wrote:
>
> > I've noticed that no one talks much about BGP cost communities. Are they
> > out
> > of scope? I don't know much about them, but I still have time to learn
and
> > practice. Obviously I would rather spend the time polishing other things
> > if
> > it's not on the exam though.
> >
> > I actually have the same question regarding BGP link-bandwidth, which
> > sounds
> > more useful for MPLS environments (another technology I'm a babe in the
> > woods
> > with).
> >
> >
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t11/feature/guide/ft11b_lb.html
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