nanog mailing list archives
Re: BGP Route Reflector - Route Server, Router, etc
From: Phil Bedard <bedard.phil () gmail com>
Date: Tue, 17 Jan 2017 11:51:12 -0500
Cisco and Juniper both have working ORR implementations, although config on the Juniper one is a bit clunky right now. One interesting thing is they also allow feeding topology data via BGP-LS, so BGP is the only protocol you need to run to/from it. Phil -----Original Message----- From: NANOG <nanog-bounces () nanog org> on behalf of Brandon Ewing <nicotine () warningg com> Date: Friday, January 13, 2017 at 17:39 To: Justin Krejci <JKrejci () usinternet com> Cc: <nanog () nanog org> Subject: Re: BGP Route Reflector - Route Server, Router, etc On Thu, Jan 12, 2017 at 08:32:44PM +0000, Justin Krejci wrote: > What are the pros and cons of one design over another? On list or private off list replies would be great; I'd welcome real world experiences (especially any big gotchas or caveats people learned the hard way) as well as just links to previous discussions, PDFs, slideshows, etc. Heck even a good book suggestion that covers this topic would be appreciated. > One important thing to remember when migrating from full mesh to a RR design is that you are reducing information available to the routers in the ASN. When you had a full mesh, each router could select the best path from all available paths, according to its position in the IGP. In a RR environment, by default, routers only have available to them the best routes from the RR's position in the IGP, which can lead to suboptimal exits being selected. Work is being done to allow RRs to compute metrics from the client's position in the IGP: See https://tools.ietf.org/html/draft-ietf-idr-bgp-optimal-route-reflection-13 for more information -- Brandon Ewing (nicotine () warningg com)
Current thread:
- Re: BGP Route Reflector - Route Server, Router, etc, (continued)
- Re: BGP Route Reflector - Route Server, Router, etc James Bensley (Jan 13)
- Re: BGP Route Reflector - Route Server, Router, etc Phil Bedard (Jan 13)
- Re: BGP Route Reflector - Route Server, Router, etc Chris Russell (Jan 13)
- Re: BGP Route Reflector - Route Server, Router, etc Robert Blayzor (Jan 13)
- RE: BGP Route Reflector - Route Server, Router, etc Emille Blanc (Jan 12)
- RE: BGP Route Reflector - Route Server, Router, etc James Breeden (Jan 12)
- Re: BGP Route Reflector - Route Server, Router, etc Leo Bicknell (Jan 13)
- RE: BGP Route Reflector - Route Server, Router, etc Justin Krejci (Jan 13)
- Re: BGP Route Reflector - Route Server, Router, etc Randy Bush (Jan 13)
- RE: BGP Route Reflector - Route Server, Router, etc Justin Krejci (Jan 13)
- Re: BGP Route Reflector - Route Server, Router, etc Brandon Ewing (Jan 13)
- Re: BGP Route Reflector - Route Server, Router, etc Phil Bedard (Jan 17)