Re: mpls pe-ce

Very good point raised Brian, it is very common for the CE to configure a
new protocol only to match the PE side and redistribute between the
protocols.

2011/3/9 Brian McGahan <bmcgahan_at_ine.com>

> In the end it all depends on your service contract. The SP technically can
> support all the IGPs on the PE-CE link, i.e. RIP, OSPF, EIGRP, and IS-IS,
> but they typically won't. When you're shopping for the service, the SP will
> tell you "we'll support only RIP", or "we'll support only RIP or OSPF".
> Just like in a BGP peering arrangement, the SP's are usually not very
> flexible in changing their policies to support a particular customer's
> requirements. If the CE isn't already running the IGP that the SP wants to
> support, it's up to the CE to redistribute between the internal routing
> domain and routes coming from the MPLS L3 VPN.
>
>
> 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
> Jeferson Guardia
> Sent: Wednesday, March 09, 2011 10:57 AM
> To: aundra browning
> Cc: Aaron; <ccielab_at_groupstudy.com>
> Subject: Re: mpls pe-ce
>
> Just from a point of view, if I was a Service Provider offering this
> service
> and if I knew my customer doesnt know well how to manage his network and if
> the design was really simple, yes, why not to go with RIPv2 ? At the end,
> yes, it pretty much depends on the design and you can go with anything, for
> really complex networks with potential growth in the future, OSPF scales
> well, so, many aspects we have to take in consideration before choosing
> what
> protocol to stick with, but as stated, they are all VRF aware and they all
> do the same job, but in a different way, with 3 single commands you can get
> RIPv2 running on the CE side and it is really simple for a customer with
> not
> much knowledge.
>
> - JG
> CCIE #28157
>
> 2011/3/9 aundra browning <browningaundra_at_gmail.com>
>
> > I wouldn't agree that Cisco would recommend RIP as best practice for a
> > PE-CE routing protocol. Every IGP - RIP, OSPF, EIGRP and ISIS (12.0S is
> > limited) is VRF aware and is supported as a PE-CE routing protocol in
> IOS. I
> > don't know where the original quote was pulled from, but each IGP above
> can
> > be used. It's also the reason there are extensions made to BGP to carry
> the
> > attributes (via extended communities) from these IGP's across an MPLS
> cloud
> > (metrics, route-types, etc.) The decision on which IGP to use will always
> > vary according to design requirements - like anything else.....
> >
> > - AB
> > CCIE #21901
> >
> >
> >
> > On Wed, Mar 9, 2011 at 10:40 AM, Jeferson Guardia <jefersonf_at_gmail.com
> >wrote:
> >
> >> Those are best practices, cisco thinks: the ce side is really simple and
> >> small, then RIP does the job, it is simple to setup and troubleshoot but
> at
> >> the end of the day any igp would accomplish it, is really up to you to
> >> decide.
> >>
> >> Sent using my Iphone
> >>
> >> Em 09/03/2011, C s 12:28, "Aaron" <aaron1_at_gvtc.com> escreveu:
> >>
> >>
> >> > " A service provider edge (PE) router can learn an IP prefix from a
> >> customer
> >> > edge (CE) router by static configuration, through a BGP session with
> the
> >> CE
> >> > router, or through the routing information protocol (RIP) exchange
> with
> >> the
> >> > CE router. "
> >> >
> >> >
> >> >
> >> > Is it just me or have y'all also read statements like this before? It
> >> seems
> >> > that I see RIP mentioned a lot when speaking of an IGP route prot that
> >> can
> >> > be used from CE to PE...does this mean I can't use eigrp, ospf ?
> >> >
> >> >
> >> >
> >> > Aaron
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
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> >>
> >>
> >>
> >>
> >>
> >
>
>
> --
> Jeferson Guardia
> CCIE #28157
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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>
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-- 
Jeferson Guardia
CCIE #28157
Blogs and organic groups at http://www.ccie.net