Does 'show route where' exist as command? Because I have syntax error. Anyway I set up my route server as here: https://www.slideshare.net/apnic/bird-routing-daemon But I am having the problem described here: https://bird.network.cz/pipermail/bird-users/2010-September/001620.html
I just edited the bird.conf of the route server, should I also edit the bird.conf of the routers which are peering with the route server? Thanks, Il giorno lun 6 apr 2020 alle ore 17:50 Alexander Zubkov <gr...@qrator.net> ha scritto: > Have you tried to check that in cli like: > show route where bgp_out(...) > And check that required route has all needed communities: > show route all x.x.x.x/y > > On Mon, Apr 6, 2020 at 5:35 PM Fabiano D'Agostino > <fabiano.dagostin...@gmail.com> wrote: > > > > Hey, > > thank you! I think I am having the same problem they had here: > > https://bird.network.cz/pipermail/bird-users/2010-September/001620.html > > > > But I didn't understand how they solved. > > > > Regards, > > Fabiano > > > > Il giorno lun 6 apr 2020 alle ore 17:16 Cybertinus <b...@cybertinus.nl> > ha scritto: > >> > >> Hello Fabiano, > >> > >> > >> BGP Communities are basically tags you add to a prefix that is received > from, or send to, a peer. And in Bird you can do whatever you want with > these communities. A community by itself has no meaning and has no > influence on the routing decision whatsoever. It is the meaning you add to > it in your configuration what makes them work. > >> > >> More information about communities: > https://en.wikipedia.org/wiki/Border_Gateway_Protocol#Communities > >> > >> > >> Kind regards, > >> Cybertinus > >> > >> > >> On 2020-04-06 17:03, Fabiano D'Agostino wrote: > >> > >> and how these kind of checks are handled? > >> if (myas,peeras) ~ bgp_community what is bgp_community? > >> > >> Thanks, > >> > >> Il giorno lun 6 apr 2020 alle ore 15:32 Fabiano D'Agostino < > fabiano.dagostin...@gmail.com> ha scritto: > >> > >> Thank you, but "if the route does not come from BGP then false" > >> here I have: > >> protocol pipe a { > >> table master; > >> mode transparent; > >> peer table a; > >> import all; > >> export where bgp_out(x); => this becomes false, what does this mean? > >> #export all; > >> } > >> > >> Thanks, > >> > >> Il giorno lun 6 apr 2020 alle ore 10:50 Bernd Naumann < > b...@spreadshirt.net> ha scritto: > >> > >> On 05.04.20 23:08, Fabiano D'Agostino wrote: > >> > Good evening, > >> > could someone explain me the meaning of these lines? > >> > > >> > function bgp_out(int peeras) > >> > { > >> > if ! (source = RTS_BGP ) then return false; > >> > if peeras > 65535 then return true; ### communities do not support > AS32 > >> > if (0,peeras) ~ bgp_community then return false; > >> > if (myas,peeras) ~ bgp_community then return true; > >> > if (0, myas) ~ bgp_community then return false; > >> > return true; > >> > } > >> > > >> > Thanks, > >> > > >> > Fabiano > >> > > >> > >> Morning, > >> > >> I can not cover the whole section but as a start... > >> > >> * if the route does not come from BGP then false (routing table source?) > >> * if the remote AS Number is greater 65535 (16 Bit) then "just" return > >> true (see AS 32 Bit Numbers, and the non-support of older > >> devices/implementations) > >> * For the next 3 I'm not 100% sure how to read but I found > >> > https://bird-users.network.narkive.com/3uDbo6H9/any-ix-willing-to-share-their-config > >> > >> ``` > >> 0:XXXXX - Do not announce route to peer XXXXX > >> 0:MyASN - Do not announce route to all peers > >> MyASN:XXXXX - Announce route to peer XXXXX only > >> MyASN:MyASN - Announce routes to all peers. This community is > >> automatically added to all routes that are not > >> tagged with any of MyASN:XXXXX communities. > >> ``` > >> > >> Maybe this helps a little bit. > >> > >> Bernd >
