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
