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 >