February 2009 - Bird-users

Bird reconfiguration without loosing the routes
by Vonlanthen, Elmar 14 Feb '09

14 Feb '09

Hello I have the following configuration: /etc/bird.conf: log syslog all; debug protocols all; router id 172.16.10.1; filter ospf_networks { if net = 172.16.10.0/24 then accept; else reject; } filter ospf_proto { if source ~ [ RTS_OSPF_EXT2 ] then accept; else reject; } protocol direct { interface "*"; } protocol kernel k_master { kernel table 254; learn; persist; scan time 10; import all; export filter ospf_proto; } protocol device { scan time 10; } protocol static { } protocol ospf { tick 2; rfc1583compat yes; import all; export filter ospf_networks; area 0.0.0.0 { interface "gre1" { type pointopoint; authentication none; cost 15; hello 10; dead 40; }; }; } This is working fine. "gre1" is the GRE interface with a point-to-point connection to a remote site (with similar configuration). Now I would like to add a second interface for a new remote site. This here would be the new ospf configuration: protocol ospf { tick 2; rfc1583compat yes; import all; export filter ospf_networks; area 0.0.0.0 { interface "gre1" { type pointopoint; authentication none; cost 15; hello 10; dead 40; }; interface "gre2" { <== new type pointopoint; authentication none; cost 15; hello 10; dead 40; }; }; } Now, how can I reload the configuration, without loosing the routes from the first remote site in the kernel table? When a use "configure" in birdc the routes are going away for a few seconds. I have the keyword "persist" in protocol kernel. If I stop bird, the routes are still there, but when I start bird again, I loose the routes for a few seconds. Many thanks for any help. Best regards Elmar

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bgp export filters?
by Harald Michl 14 Feb '09

14 Feb '09

Hi! I've two questions regarding filtering of bgp announcements. One simple and one more complicated :-) The simple one: I do not want to announce prefixes that have the community 0:64003 attached, but all other prefixes. What I did is: export filter { if (0,64003) ~ bgp_community then { reject; } accept; }; The peer receives no prefixes at all. Any hints? The other question is more interesting/complicated. Is it possible to include some kind of macros in outbound filters? What I would like would be: export macro XYZ { if (0,<remote-as>) ~ bgp_community then { reject; } accept; }; and in the per bgp peering section I'd only write: export filter XYZ; Does that feature exist? If not, would somebody else need something? regards, Harald -- Harald Michl <harald.michl(a)univie.ac.at> Vienna University - ACOnet www.ACO.net - VIX www.VIX.at Universitaetsstrasse 7, A-1010 Vienna, Austria, Europe Tel: +43 1 4277 - 14078 (Fax: - 9140) HM3550-RIPE

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RE: Bird to quagga interoperation
by Vonlanthen, Elmar 10 Feb '09

10 Feb '09

Hello Ondrej In the thread "BIRD <-> Quagga Compatiblity" (started in May, 2007) I have already posted some informations. If you haven't access to the old thread, I could post the mails/infos again. Is possible that Quagga does something wrong? Best regards Elmar -----Original Message----- From: Ondrej Zajicek [mailto:santiago@crfreenet.org] Sent: Mittwoch, 4. Februar 2009 23:43 To: Vonlanthen, Elmar Cc: bird-users(a)network.cz Subject: Re: Bird to quagga interoperation (WARNING!!! PGP with incorrect signature) On Wed, Feb 04, 2009 at 11:30:52AM +0100, Vonlanthen, Elmar wrote: > Hello > > We still have some hosts with the quagga routing daemon in a bird > environment. > > With the bird releases 1.0.11 and 1.0.12 it is not working. Bird gets > the routes, but quagga doesn't. Can you provide a better description of your network setting? The current code seems to me being fully RFC-compliant. I will look at it. The LSA generating code needs some review, but this is an issue i don't know about. -- Elen sila lumenn' omentielvo Ondrej 'SanTiago' Zajicek (email: santiago(a)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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Bird to quagga interoperation
by Vonlanthen, Elmar 04 Feb '09

04 Feb '09

Hello We still have some hosts with the quagga routing daemon in a bird environment. With the bird releases 1.0.11 and 1.0.12 it is not working. Bird gets the routes, but quagga doesn't. With the following patch, which Ondrej gave me, it is working (with both releases). Is there any reason, why this patch is not in the current bird release? --- bird-1.0.11.old/proto/ospf/topology.c 2005-02-21 11:05:22.000000000 +0100 +++ bird-1.0.11/proto/ospf/topology.c 2008-09-30 14:32:45.000000000 +0200 @@ -90,14 +90,7 @@ ln->id = neigh->rid; ln->metric = ifa->cost; ln->notos = 0; - if (ifa->iface->addr->flags & IA_UNNUMBERED) - { - ln->data = ifa->iface->index; - } - else - { - ln->data = ipa_to_u32(ifa->iface->addr->ip); - } + ln->data = ipa_to_u32(ifa->iface->addr->ip); } else { Best regards Elmar

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