Re: mpls vpn question - pe to ce protocol is OSPF

Just to add a few things ...

LDP - seems easy enough, but how to run this on a NBMA network with several
routers on the segment? (not meant to be a trick question ... but if you
have tried this, you know where I am going with this)

Quarks related to address families and the routing protocols.

MTU issues ... now that we have added a label to every packet ...

An over whelming list of new commands ... but in reality, only a few
sections are important.

Joe - I cannot wait to read your blog!!!

On Tue, Sep 15, 2009 at 3:33 AM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> I realized tonight when writing a blog about MPLS L3 VPN -- I think it is
> awesome that Cisco has this on the exam because you HAVE to be an expert in
> a LOT of different underlying technologies to configure it. For instance...
>
> Frame-Relay
> OSPF
> OSPF over Frame-Relay (more than likely)
> BGP (including MP-BGP, address-families...)
> VRFs
> Redistribution mutually between BGP and RIP, EIGRP, and OSPF
>
> If you don't know how to configure those underlying pieces individually,
> you will stand now chance : ) Nice!
>
>
> On Tue, Sep 15, 2009 at 12:28 AM, ALL From_NJ <all.from.nj_at_gmail.com>wrote:
>
>> You rock, thanks
>>
>>
>> On Tue, Sep 15, 2009 at 12:26 AM, Piotr Matusiak <piotr_at_ccie1.com> wrote:
>>
>> > Let's left something to be done on SP lab :)
>> > I think this is too advanced for R&S and would not expect that on the
>> exam.
>> > Anyways, good to know that there is something like sham links so you
>> > will not get heart attack when see those words in the task :)
>> >
>> > Good luck!
>> >
>> > --
>> > Piotr Matusiak
>> > CCIE #19860 (R&S, SEC)
>> >
>> >
>> > 2009/9/15 ALL From_NJ <all.from.nj_at_gmail.com>:
>> > > Super cool guys, many thanks.
>> > >
>> > > Yeah, I read about the 'super backbone' and figured this was being
>> > > considered another area ... it is a super area. ;-)
>> > >
>> > > Thanks team ... I do not see sham links on the blue print ... perhaps
>> > this
>> > > is 'in-there' or implied somewhere? Please comment.
>> > >
>> > > Many thanks again!!!
>> > >
>> > > Andrew
>> > >
>> > >
>> > >
>> > > On Mon, Sep 14, 2009 at 7:27 PM, Luis Anzola <lanzola_at_desca.com>
>> wrote:
>> > >
>> > >> Hi Andrew,
>> > >>
>> > >> You get IA routes because it is the default behavior when you us
>> OSPF
>> > as
>> > >> PE-CE routing protocol as Piotr commented. In a normal situation when
>> > you
>> > >> redistribute BGP into OSPF you will have a External Route. In this
>> case,
>> > >> OSPF use the concept of Super Backbone inside the MPLS Domain where
>> the
>> > >> Redistribution from MP-BGP into OSPF generates IA routes to avoid the
>> > >> following caveats:
>> > >>
>> > >> * External routes cannot be summarized.
>> > >> * External routes are flooded across all OSPF areas.
>> > >> * External routes could use a different metric type that is not
>> > comparable
>> > >> to OSPF Cost.
>> > >> * Internal routes are always preferred over external routes,
>> regardless
>> > of
>> > >> their cost.
>> > >>
>> > >>
>> > >> Ing. Luis Anzola
>> > >>
>> > >> CCIE # 21959 | e-mail: lanzola_at_desca.com
>> > >>
>> > >> -----Mensaje original-----
>> > >> De: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] En nombre
>> de
>> > ALL
>> > >> From_NJ
>> > >> Enviado el: Lunes, 14 de Septiembre de 2009 04:47 p.m.
>> > >> Para: Cisco certification
>> > >> Asunto: mpls vpn question - pe to ce protocol is OSPF
>> > >>
>> > >> Hey yall, ;-)
>> > >>
>> > >> I hope this email finds you doing well.
>> > >>
>> > >> Labed up a scenario and have a quick question about OSPF routes on
>> > either
>> > >> CE. They show as IA.
>> > >>
>> > >> On each PE, I have the same process number and the same domain-id is
>> > listed
>> > >> in the show ip ospf 2 command (I am using process number 2 for my
>> vrf).
>> > I
>> > >> know this would show an E2 route ... but just the same, the configs
>> are
>> > >> identical. Also ping and everything works fine across the MPLS
>> > backbone.
>> > >>
>> > >> Why would I get IA and not an 'O' ? The little research I did makes
>> > this
>> > >> appear "it is what it is".
>> > >>
>> > >> Back when I used to actually work w/ MPLS, I forgot if this was ever
>> an
>> > >> issue ... humm ... don't remember ever being worried about this.
>> > >>
>> > >> Any thoughts?
>> > >>
>> > >> I am going to be moving on to EIGRP or RIP tonight, but if anyone has
>> > any
>> > >> thoughts or comments I would love to hear them. Kindest regards
>> team,
>> > >>
>> > >> --
>> > >> Andrew Lee Lissitz
>> > >> all.from.nj_at_gmail.com
>> > >>
>> > >>
>> > >> Blogs and organic groups at http://www.ccie.net
>> > >>
>> > >>
>> _______________________________________________________________________
>> > >> Subscription information may be found at:
>> > >> http://www.groupstudy.com/list/CCIELab.html
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >>
>> > >
>> > >
>> > > --
>> > > Andrew Lee Lissitz
>> > > all.from.nj_at_gmail.com
>> > >
>> > >
>> > > Blogs and organic groups at http://www.ccie.net
>> > >
>> > >
>> _______________________________________________________________________
>> > > Subscription information may be found at:
>> > > http://www.groupstudy.com/list/CCIELab.html
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> >
>>
>>
>>
>> --
>> Andrew Lee Lissitz
>> all.from.nj_at_gmail.com
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
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>>
>>
>>
>>
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>>
>>
>>
>
>
> --
> Regards,
>
> Joe Astorino - CCIE #24347 R&S
> Technical Instructor - IPexpert, Inc.
> Cell: +1.586.212.6107
> Fax: +1.810.454.0130
> Mailto: jastorino_at_ipexpert.com
>

-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net