Setting up anycast DNS using bird

[Ondrej Zajicek]

On Tue, Jan 19, 2010 at 12:56:04AM +0100, Ondrej Filip wrote:
> > # only guesswork here: I'm presuming this scans all dummy interfaces, and looks what is up and configured?

Yes

> > protocol direct {
> >         interface "dummy*";
> > }
> > 
> > protocol bgp {
> >         debug all;
> >         local as 65516;
> >         neighbor 192.168.1.2 as 3265;
> >         source address 192.168.1.1;
> > 
> > 	# again: guesswork, does this announce all 'protocol direct' stuff?
> >         export all;

Yes, it announces all routes from BIRD routing table, which is filled by
routes from protocol direct.

> > }
> > 
> > My preference would be to explicitly list the prefixes that I want to announce, not having to rely on what I'm really configuring on my linux dummy interface. Is that coming, or did I misinterpret the docs?
> 
> Hi, of course you can specify export filters:
> 
> E.g.
> 
> ===========
> filter bgp_out {
>         if (net = 192.175.48.0/24 ) then accept;
>         else reject;
> }
> 
> protocol bgp {
>         debug all;
>         local as 65516;
>         neighbor 192.168.1.2 as 3265;
>         source address 192.168.1.1;
>         export export filter bgp_out;
	  ^^^^^^^^^^^^^
	  there should be just one 'export'

> }
> ===========
> 
> But there is more way then just this one.

The other way is to not import routes from direct protocol, but explicitly
specify them using static protocol.

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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