[ixpmanager] IPv4 & IPv6 peering but no routes being learned by IPv6
Diarmuid O Briain
diarmuid at obriain.com
Mon Feb 12 19:47:59 GMT 2018
Barry,
Cool, that makes sense, thanks for all the work on this.
regards,
Diarmuid
--
*Irish by birth, located in Uganda but Munster by the grace of God.*
On 12 February 2018 at 22:36, Barry O'Donovan <barry.odonovan at inex.ie>
wrote:
>
>
> Diarmuid O Briain wrote:
> > I did a bit of debugging and the problem appears to be related to the
> > import filter.
> >
> > I stopped the automatic updating of the bird conf files from IXP Manager
> > and edited the last one where I hashed out the "import filter" lines in
> > the protocol configurations. I bounced the bird6 process and hey presto
> > the routes came in. So what is it about the filter that is causing this
> > problem ?
>
> So filtering doesn't happen until routes are piped to the master table.
> If you look at routes received by a protocol you'd probably see your
> per-client missing routes. E.g.
>
> show route protocol pb_00xx_asyyyy
>
> >From the below, it looks like you're advertising /64's and we recently
> updated the router templates to (more correctly) filter anything >/48
> for IPv6 (IPv4 already had a filter for >/24).
>
> This isn't officially released yet but it is configurable by adding the
> following to .env (show here with default values):
>
> IXP_IRRDB_MIN_V4_SUBNET_SIZE=24
> IXP_IRRDB_MIN_V6_SUBNET_SIZE=48
>
> The line that controls this in the filter is (near the top of the config
> file):
>
>
> prefix set martians;
> {
> martians = [
> ...
> ::/0{49,128} # Filter small prefixes
> ];
>
>
> - Barry
>
>
> > ubuntu at rs1:/etc/bird$ *cat bird-rs1-lan1-ipv6.conf | grep '#
> > import filter'*
> > # import filter f_import_0001_as5111;
> > # import filter f_import_0002_as5222;
> > # import filter f_import_0003_as5333;
> >
> > ubuntu at rs1:/run/bird$ *sudo birdc6 -s bird-rs1-lan1-ipv6.ctl *
> > BIRD 1.6.3 ready.
> > bird> show route
> > 2a99:3:3::/64 via 2a99:9:9::33 on ens4 [pb_0003_as5333 17:36:52] *
> > (100) [AS5333i]
> > 2a99:2:2::/64 via 2a99:9:9::22 on ens4 [pb_0002_as5222 17:36:53] *
> > (100) [AS5222i]
> > 2a99:1:1::/64 via 2a99:9:9::11 on ens4 [pb_0001_as5111 17:36:52] *
> > (100) [AS5111i]
> > bird> exit
> >
> > regards,
> >
> > Diarmuid
> >
> > --
> >
> > */Irish by birth, located in Uganda but Munster by the grace of God./*
> >
> >
> >
> > On 12 February 2018 at 19:56, Diarmuid O Briain <diarmuid at obriain.com
> > <mailto:diarmuid at obriain.com>> wrote:
> >
> > Hi,
> >
> > I tested the configuration with a simple bird and bird6 setup first
> > to ensure it was working.
> >
> > ubuntu at rs1:~$* cat /etc/bird/bird6.conf*
> > log syslog all;
> >
> > router id 199.9.9.1;
> > define LOCAL_AS = 5999;
> >
> > template bgp PEERS {
> > rs client;
> > local as LOCAL_AS;
> > import all;
> > export all;
> > }
> >
> > protocol device {
> > scan time 10;
> > }
> >
> > protocol kernel {
> > export all;
> > scan time 15;
> > }
> >
> > protocol bgp AS5111 from PEERS {
> > neighbor 2a99:9:9::11 as 5111;
> > }
> >
> > protocol bgp AS5222 from PEERS {
> > neighbor 2a99:9:9::22 as 5222;
> > }
> >
> > protocol bgp AS5222 from PEERS {
> > neighbor 2a99:9:9::33 as 5333;
> > }
> >
> > pretty much the same for the bird.conf file except for the neighbour
> > addresses.
> >
> > After setting up the IXP Manager scripts on the rs1 the
> > bird-rs1-lan1-ipv{4|6}.ctl and the bird-rs1-lan1-ipv{4|6}.conf files
> > are now generated by IXP Manager.
> >
> > BGP peers are establishing for both birdc and birdc6 daemons but
> > under the birdc6 no routes are being learnt. They were fine with the
> > simple configuration above.
> >
> > ubuntu at rs1:~$ sudo birdc
> > BIRD 1.6.3 ready.
> > bird> *show protocol*
> > name proto table state since info
> > device1 Device master up 15:24:54
> > pp_0001_as5111 Pipe master up 15:24:54 => t_0001_as5111
> > pb_0001_as5111 BGP t_0001_as5111 up 15:24:58 Established
> > pp_0002_as5222 Pipe master up 15:24:54 => t_0002_as5222
> > pb_0002_as5222 BGP t_0002_as5222 up 15:24:58 Established
> > pp_0003_as5333 Pipe master up 15:24:54 => t_0003_as5333
> > pb_0003_as5333 BGP t_0003_as5333 up 15:24:58 Established
> >
> > bird> *show route*
> > 199.1.1.0/24 <http://199.1.1.0/24> via 199.9.9.11 on ens4
> > [pb_0001_as5111 15:24:58] * (100) [AS5111i]
> > 199.3.3.0/24 <http://199.3.3.0/24> via 199.9.9.33 on ens4
> > [pb_0003_as5333 15:24:58] * (100) [AS5333i]
> > 199.2.2.0/24 <http://199.2.2.0/24> via 199.9.9.22 on ens4
> > [pb_0002_as5222 15:24:58] * (100) [AS5222i]
> > bird> exit
> >
> > ubuntu at rs1:~$* sudo birdc6*
> > BIRD 1.6.3 ready.
> > bird> show protocol
> > name proto table state since info
> > device1 Device master up 15:24:54
> > pp_0001_as5111 Pipe master up 15:24:54 => t_0001_as5111
> > pb_0001_as5111 BGP t_0001_as5111 up 15:24:58 Established
> > pp_0002_as5222 Pipe master up 15:24:54 => t_0002_as5222
> > pb_0002_as5222 BGP t_0002_as5222 up 15:24:58 Established
> > pp_0003_as5333 Pipe master up 15:24:54 => t_0003_as5333
> > pb_0003_as5333 BGP t_0003_as5333 up 15:24:55 Established
> >
> > bird> *show route*
> > bird>
> >
> > regards,
> >
> > Diarmuid
> > --
> >
> > */Irish by birth, located in Uganda but Munster by the grace of
> God./*
> >
> >
> >
> > _______________________________________________
> > INEX IXP Manager mailing list
> > ixpmanager at inex.ie
> > https://www.inex.ie/mailman/listinfo/ixpmanager
>
> --
>
> Kind regards,
> Barry O'Donovan
> INEX Operations
>
> https://www.inex.ie/support/
> +353 1 531 3339
>
>
> _______________________________________________
> INEX IXP Manager mailing list
> ixpmanager at inex.ie
> https://www.inex.ie/mailman/listinfo/ixpmanager
>
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