[ixpmanager] Route Server Installation

[Barry O'Donovan]

Fabiano D'Agostino wrote on 02/04/2020 20:51:
> but how does IXP Manager decide route server client import/export policies?

I think it would be useful to get the terminology correct here. IXP 
Manager generates Bird configuration. Bird, the BGP daemon, makes the 
routing decisions.

The IXP Manager template for route servers, by default, will:

- import appropriate routes from a member (standard sanity checking, 
IRRDB entries and RPKI - the video I linked and the presentation Nick 
linked both explain how this works).

- export all routes accepted from other peers - so:


> template bgp tb_rsclient {
>      something..
>      ipv4 {
>            export all;
>      }
> }
> but I have:
> protocol bgp from tb_rsclient {
>      ipv4 {
>            import filter f_import;
>            export filter f_export (does this override the export all in 
> the template?)
>     }
> }

Yes, this does override 'export all'. This is Bird behavior and there's 
an example at the end of this page:

https://bird.network.cz/?get_doc&v=20&f=bird-3.html#ss3.4

The main thing is that the standard export filter function just strips 
out any communities that IXP Manger's Bird configuration added to routes 
as it learnt them from other peers. Again, this is explained in both the 
video and presentation. Once those communities are stripped, it's still 
an 'export all' by default.

Individual members may use the standard IX BGP communities to control 
advertisement of their prefixes to other members. See INEX's examples in 
the 'Community based prefix filtering' section on this page:

https://www.inex.ie/technical/route-servers/

This is baked in as standard - just swap our ASN (43760) for your own.

  - Barry


> 
> Thanks,
> 
> Il giorno gio 2 apr 2020 alle ore 15:57 Nick Hilliard (INEX) 
> <nick at inex.ie <mailto:nick at inex.ie>> ha scritto:
> 
>     Fabiano D'Agostino wrote on 02/04/2020 14:51:
>      > Thank you Nick, I was able to get the bird.conf, but IXP Manager
>     just
>      > generates the configuration for bgp sessions? I mean it doesn't
>     produce
>      > the kernel protocol or the direct protocol in the bird.conf.
> 
>     yes, that's correct.  The routes are not installed in the route server
>     kernel.  This is intentional.
> 
>     Nick
> 
> 
> 
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-- 

Kind regards,
Barry O'Donovan
INEX Operations

https://www.inex.ie/support/
+353 1 531 3339