To make it simple you should use a unique RD per VRF. As a Service Provider Your design requires a unique VRF per Customer and Use the RTs to import or export routes between customers.
Stay Warm!!! De : Les Waller <[email protected]> >À : Bob McCouch <[email protected]> >Cc : CCIE OSL <[email protected]> >Envoyé le : Mardi 3 juillet 2012 12h01 >Objet : Re: [OSL | CCIE_RS] Simple VRF/RD question - 1 RD per VPN or per >VRF/site? > >It makes it simpler (less complex) to use the same identifier per VRF. If >you have lots of customers talking to each and they all have unique >identifiers on each side of the VPN, you would need to refer to a table of >some sort to work out issues from one end to another or have a good way of >identifying the VRFs at each PE router so it can be easily understood. > >My thoughts with limited exposure. > >Les > >On Tue, Jul 3, 2012 at 5:10 PM, Bob McCouch <[email protected]> wrote: > >> Hey All, >> >> The route-distinguisher's purpose is to make an IPv4 prefix globally unique >> within the MPLS VPN M-BGP environment. I'm good with that. Some references >> I've seen suggest setting a unique RD per VRF (or per site if you prefer to >> think of it that way), so the CUST-A VRF on R1 uses RD 1:100 and the CUST-A >> VRF on R2 uses RD 1:200. >> >> Would it not be a safe assumption that the two (or three, or 20) CUST-A >> sites (in other words, that entire VPN) would not have a uniqueness problem >> with prefixes? Couldn't we safely use RD 1:100 for all CUST-A sites on all >> PE routers without any real risk of a VPNv4 prefix collision? >> >> I guess I'm curious whether the general recommendation is to *always* use a >> unique value no matter what, or if it's common to use the same RD value for >> multiple sites of the same VPN. >> >> Any insight or real-world experience would be appreciated. Thanks! >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com <http://www.platinumplacement.com/> >> >> http://onlinestudylist.com/mailman/listinfo/ccie_rs >> > > > >-- >Les Waller, Network Engineer > >Home Page: www.leswaller.com > >MBA, CISSP, CCNP >_______________________________________________ >For more information regarding industry leading CCIE Lab training, please >visit www.ipexpert.com > >Are you a CCNP or CCIE and looking for a job? Check out >www.PlatinumPlacement.com > >http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
