Re: MPLS Route Targets

hahahahaha

Such hot blooded people.......My Grandma was hot blooded as well, but she
was Armenian.

On Tue, Aug 24, 2010 at 3:10 AM, Paul Negron <negron.paul_at_gmail.com> wrote:

> Now we are getting somewhere.( and being 100% Puerto Rican from the East
> Coast should be enough for you to know where I am coming from). Ha !! :-)
>
> Addressing this statement in the thread below:
>
> "... I'm saying that if the RDs of two VRFs
> that have access to the same network do not match, the route that will
> be used by some (other) site to reach that network might not be based
> on BGP metrics. I've to check this though."
>
>
> It is. I manipulated the path chosen by modifying the LOCAL PREFERENCE
> through the VPNv4 peering sessions.
>
> I still encourage you to check though. I want you to be very sure.
>
> A disagreement should always lead to progress. No matter which side you
> choose. :-)
>
> Paul
> --
> Paul Negron
> CCIE# 14856 CCSI# 22752
> Senior Technical Instructor
> www.micronicstraining.com
>
>
>
> > From: Carlos G Mendioroz <tron_at_huapi.ba.ar>
> > Date: Mon, 23 Aug 2010 13:38:53 -0300
> > To: Paul Negron <negron.paul_at_gmail.com>
> > Cc: Narbik Kocharians <narbikk_at_gmail.com>, Adam Booth <
> adam.booth_at_gmail.com>,
> > Brad Edgeworth <edgie512_at_gmail.com>, Cisco certification
> > <ccielab_at_groupstudy.com>
> > Subject: Re: MPLS Route Targets
> >
> > :)
> > No emotions attached here, just trying to get a clear view of tecnology.
> > (Even though I have latin blood in my veins, so beware... LOL)
> >
> > So let's get back to your ... "period!", remove any "this is it, final
> > sentence (TM)" and see:
> >
> > My point is that BGP routes (elects best path) to destinations,
> > which in the case of vpnv4 are RD+ipv4 prefix.
> > In so doing, it will not use metrics (LPref, Path length, etc) to
> > choose best PATH if the destination is not the same, it will just
> > transport both (assuming we have two) routes to all places as they
> > would be two different routes.
> >
> > This is only relevant iff (if and only if) you have the same network
> > at two different PEs. If not, routes are different no matter what RD
> > you use, so your comment on RDs and central site does not apply here.
> > (I'm not saying that each site in a VPN has to have the same RD,
> > ok ?)
> >
> > So with your complete attention, I'm saying that if the RDs of two VRFs
> > that have access to the same network do not match, the route that will
> > be used by some (other) site to reach that network might not be based
> > on BGP metrics. I've to check this though. In any case, both routes
> > will be visible at the originating PE. Conceptually, they would be two
> > routes.
> >
> > -Carlos
> >
> > Paul Negron @ 23/8/2010 11:50 -0300 dixit:
> >> Carlos,
> >>
> >> Just so you know...I am writing this email with a complete calm
> demeanor, so
> >> don't feel threatened. I am simply in complete disagreement with your
> point
> >> and don't feel it is an issue that we can disagree agreeable on. I do
> not
> >> want others to think you may be correct on an issue that is poorly
> >> documented.
> >>
> >> RD's do not have to match ....period! You can see the route easily in
> the
> >> other RD section under BGP even when the RD's don't match.
> >> They are only used to present the potential overlapping addressing
> >> condition. Also, if you are running Overlapping VPN's, which RD is the
> >> Central Site going to get? It can only match one site or the other if I
> take
> >> your view.
> >>
> >> There are many that have thought as you have and ended up reconfiguring
> MANY
> >> MANY sites due to poor planning. I do not speak from a position of "I
> >> Think" mentality. I am using may large SP's as an example.
> >>
> >> Look back in the thread. I never over simplified the issue by stating
> that
> >> the RD is a "syntax need". You cannot run MPLS VPN without them.
> >>
> >> As for your example in the thread below which stated: "If your customer
> has
> >> two entry/exit points to the same network across different PEs, THEY
> BETTER
> >> MATCH (RDs) for BGP being able to know they actually are the same
> network
> >> and route based on metrics."
> >>
> >> You have my complete attention now. What would happen if the RD's did
> not
> >> match in your example?
> >>
> >> Paul
> >
> > --
> > Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>
>
>

-- 
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com
Sr. Technical Instructor
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