nanog mailing list archives
Re: BGP Route Reflector - Route Server, Router, etc
From: Youssef Bengelloun-Zahr <bengelly () gmail com>
Date: Mon, 20 Mar 2017 11:46:32 +0100
Same old same. Y. 2017-03-20 11:35 GMT+01:00 Mark Tinka <mark.tinka () seacom mu>:
On 14/Jan/17 00:39, Brandon Ewing wrote:One important thing to remember when migrating from full mesh to a RRdesignis 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 RRenvironment,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 beingselected.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-13for more informationBGP-ORR is currently supported in Junos and IOS XR (ASR9000, I believe... I haven't confirmed for other IOS XR platforms). I'm getting Cisco to add support for it in IOS and IOS XE (CSR1000v). I'm now dealing with the usual "How large is the customer's spend for this feature" nonsense. BGP-ORR, I feel, is one of those features that doesn't need a business case - much like ketchup at a fast-food joint. That the IOS XR PI team have it in there and the IOS/IOS XE PI teams don't highlights the depth of the fundamental problem over at Cisco-land. Mark.
Current thread:
- Re: BGP Route Reflector - Route Server, Router, etc Mark Tinka (Mar 20)
- Re: BGP Route Reflector - Route Server, Router, etc Youssef Bengelloun-Zahr (Mar 20)
- Re: BGP Route Reflector - Route Server, Router, etc Greg Hankins (Mar 20)
- Re: BGP Route Reflector - Route Server, Router, etc James Bensley (Mar 20)
- Re: BGP Route Reflector - Route Server, Router, etc Saku Ytti (Mar 20)
- Re: BGP Route Reflector - Route Server, Router, etc James Bensley (Mar 20)