Hello Kurt. By your solution, would it be possible to announce no prefix over the upstream that you want to shutdown (export none;)?
About "local preference", I thought it is only applicable for IBGP not for EBGP but it seems it can now be used for eBGP neighbors (as described by allow bgp_local_pref switch at bird BGP doc). We will keep you updated with our results so others can take advantage of them too. Best Regards. > You could announce more specific routes on the upstream that you want > to keep and make sure you're outgoing traffic goes via the upstream > you want to keep by example higher local pref. > > > > kurt > > > > Op vr 7 dec. 2018 22:53 schreef Francis Brosnan Blázquez > <[email protected]: > > Hello. > > We are using bird with several upstream providers, all of them > with a > share of traffic. > > We are in the process of shutting down one of them but we are > unsure > how to proceed to minimize loss of traffic. > > We have been reading and looking for general recommendations > but it is > not clear (besides using graceful shutdown which is not > supported by > the upstream we want to shutdown). > > We have been looking at mailing list but we haven't found > anything > treating this matter. > > So far, solutions we have come up are: > > 1) Use AS-path prepend to increase metric on the uptstream to > be > shutted down and once nearly no traffic comes in through that > link, shutdown > BGP and unplug. Something like: > > export filter > { > > > > > > > if source = RTS_STATIC then { # Export only static > routes > > > # Assign our > community > > > > bgp_community.add((65000,64501)); > > > # Artificially increase path > length > > > # by advertising local AS number > twice > > > if bgp_path ~ [= 65000 =] > then > > > bgp_path.prepend(65000); > bgp_path.prepend(65000); > > accept; > > > } > > > > > reject; > > > }; > > 2) Another solution is to just shutdown BGP session but leave > upstream > connected and configured (so outdated routers we still reach > us...). > > 3) And the obvious, just shutdown BGP session and unplug the > cable. > > It would be great to know your opinion and what's the > recommended way > to proceed. > > What do you think? > > Many thanks > Best Regards. > > > > > -- Francis Brosnan Blázquez - ASPL http://www.asplhosting.com/ http://www.aspl.es/ https://twitter.com/aspl_es https://twitter.com/asplhosting https://twitter.com/francisbrosnanb https://es.linkedin.com/in/francis-brosnan-blázquez-1353a218 91 134 14 22 - 91 134 14 45 - 91 116 07 57 Av. Juan Carlos I 13, 2ºC, Torre Garena 28806 - Alcalá de Henares (España) AVISO LEGAL En virtud de lo dispuesto en la Ley Orgánica 15/1999, de 13 de diciembre, de Protección de Datos de Carácter Personal, le informamos de que sus datos de carácter personal, recogidos de fuentes accesibles al público o datos que usted nos ha facilitado previamente, proceden de bases de datos propiedad de Advanced Software Production Line, S.L. (ASPL). ASPL garantiza que los datos serán tratados con la finalidad de mantener las oportunas relaciones comerciales o promocionales con usted o la entidad que usted representa. No obstante, usted puede ejercitar sus derechos de acceso, rectificación, cancelación y oposición dispuestos en la mencionada Ley Orgánica, notificándolo por escrito a ASPL - Protección Datos, Av. Juan Carlos I 13, 2ºC, Alcalá de Henares (Madrid).
