- Bird-users - Mailing Lists

BGP Reconfiguration
by Wolfgang Hennerbichler 09 Jul '09

09 Jul '09

Hi folks, after reading the whole documentation nearly twice, I configured some stuff with BGP and so far it looks quite nice. I really like the verbosity of bird, it totally tells me what's going on, this is really nice. One thing I don't like that much is that it seems that I don't have a chance to reconfigure ONE BGP neighbour without dropping the BGP sessions to all other neighbors. I'm altering the config-file for a specific BGP neighbor and after that I am issueing > configure soft from the birdc-shell. This drops the BGP connections to ALL neighbors. This is not ideal as I would like to use bird also a route-server on our internet-exchange. Of course this problem can be overcome by using two route-server instances, but this is not really satisfying (and IXP customers might not really like the fact that every new customer causes BGP drops). I understand that if I just tweak the filters no sessions are dropped. Do the developers think there is a fair chance to fix that? Furthermore, is there something like BGP soft reconfiguration (inbound/ outbound) for a specific peer? Wolfgang -- www.vix.at | www.aco.net wh(a)univie.ac.at | WH844-RIPE Vienna University Computer Center

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question on md5 and linux
by Wolfgang Hennerbichler 09 Jul '09

09 Jul '09

Hi, sorry if this question has been asked 100times before, but I didn't find a mailing list archive. We (VIX, ACOnet) are taking a look at BIRD within the following months to use it for various purposes. One of the requirements though (and unfortunately) is to support md5 passwords. I know bird is capable of doing this but as far as my understanding goes this is something the operating system has to support, too. I know linux does now have native md5+tcp support in the kernel. Is this supported with BIRD? If so, does anybody have a hint for me how to use it (for not having to reinvent the wheel) on linux- side? Is there a wiki (other than euro-ix which I know of) where I could add precious information regarding my work with bird? thanks for any help; Wolfgang -- www.vix.at | www.aco.net wh(a)univie.ac.at | WH844-RIPE Vienna University Computer Center

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how to filterout private ip ranges
by Martin Kraus 03 Jul '09

03 Jul '09

hi. I'm trying to filter out private ip ranges from ospf. I've defined filter: filter privateip { if net ~ [ 192.168.0.0/16+, 10.0.0.0/8+, 172.16.0.0/12+ ] then reject; accept; } and used in ospf protocol configuration: export filter privateip; in birdc using: show route filter privateip on this router shows only public ip prefixes. however on the neighbouring router I still get the private routes: 10.128.1.0/24 dev tap_infonet [ospf1 22:20] I (150/10) 172.29.201.0/24 via 10.128.1.1 on tap_infonet [ospf1 22:21] I (150/20) 172.16.7.0/24 via 10.128.1.1 on tap_infonet [ospf1 22:21] I (150/20) 172.23.0.128/25 via 10.128.1.1 on tap_infonet [ospf1 22:21] I (150/20) 172.16.30.0/24 via 10.128.1.1 on tap_infonet [ospf1 22:21] I (150/20) 172.23.4.128/25 via 10.128.1.1 on tap_infonet [ospf1 22:21] I (150/20) ospf export filter filters out some of the private prefixes, but not all. what bothers me is that using show route with the defined filter works right. is there something I'm doing wrong? thanks mk

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Bird is crashing on NetBSD 5.0 sparc64 with Bus Error.
by Frederic Jaeckel 02 Jul '09

02 Jul '09

Hi everybody, as it works on x86 and amd64 like a charm, it doesn't on sparc64. Maybe someone want to have a look at it. :) Regards, Frederic Jaeckel -- PASTE -- # ./bird Bus error (core dumped) # gdb ./bird bird.core GNU gdb 6.5 Copyright (C) 2006 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "sparc64--netbsd"... Reading symbols from /usr/lib/libc.so.12...done. Loaded symbols for /usr/lib/libc.so.12 Reading symbols from /usr/libexec/ld.elf_so...done. Loaded symbols for /usr/libexec/ld.elf_so Core was generated by `bird'. Program terminated with signal 10, Bus error. #0 config_alloc (name=0x13d1d8 "/usr/pkg/etc/bird.conf") at conf.c:79 79 cfg_mem = c->mem = l; (gdb) backtrace #0 config_alloc (name=0x13d1d8 "/usr/pkg/etc/bird.conf") at conf.c:79 #1 0x000000000012e110 in unix_read_config (cp=0xffffffffffffba48, name=0x13d1d8 "/usr/pkg/etc/bird.conf") at main.c:93 #2 0x000000000012e2d8 in main (argc=1, argv=0xffffffffffffbba8) at main.c:111

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how does bird choose primary ip address for ospf?
by Martin Kraus 30 Jun '09

30 Jun '09

Hi. I've just ran into a little problem with bird 1.1.0, but it just might be a problem with linux. I'm setting ip addresses on interfaces using ifupdown and /etc/network/interfaces where public ip address gets set up using builtin configuration parameters(address/netmask) and private ip address(for switches etc.) gets set up using the "up /sbin/ip address add ...." command. I've never had any problems using this setup, since it first sets the public ip address, which ospf uses, and then sets the private prefix, which just gets propagated. Today, using the same configuration, bird chose the private ip address as a primary address for ospf. The ip private ip address was set up as a second address but using show interfaces in bird client showed the private ip address as primary: eth1 up (index=3) MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500 172.23.17.129/25 (Primary, broadcast 172.23.17.255, scope site) 212.71.177.129/28 (Unselected, broadcast 212.71.177.143, scope univ) Could this be an issue with bird, or is it some problem with kernel/ifupdown? thanks mk

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New release 1.1.0
by Ondrej Filip 28 Jun '09

28 Jun '09

Hello! New version is ready. Due to some significant changes (especially in PIPE and BGP protocol) we have decided to name it 1.1.0. Ondrej Version 1.1.0 (2009-06-28) o Parametrized pair and path mask expessions in the filter language. o Transparent pipe mode allows to implement BGP route server with independent route policy for each peer. o Kernel route table synchronization does not allow overwriting of alien routes. o Configureable BGP import route limits. o During BGP error delay, incoming connections are rejected. o BGP route statistics. o Better support for multiple network addresses on OSPF interfaces. o As usual, miscellaneous bugfixes.

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bird/BGP: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301
by Dr. Christian Riede 16 Jun '09

16 Jun '09

Hello, in the search for an alternative to quagga that hopefully has different bugs ;-), i am currently evaluating bird. Setup: +--gw01--+ OpenSuSE/Quagga with uplink (not drawn here) | | +--gw02--+ OpenSuSE/Quagga with uplink (not drawn here) | | +--gw03--+ OpenBSD/openbgpd without Uplink | | +--gw04--+ OpenSuSE/bird without Uplink So we have 4 gateways, all connected redundantly via two ethernet networks. All gateways are VMs on two different VMware ESX. BGP is configured fully meshed. The two Quaggas (gw01, gw02) are running stable. The OpenBSD/openbgpd router (gw03) is running completely unstable and dies after some time. This might be an VMWare issue. See http://marc.info/?l=openbsd-misc&m=124333601917681&w=2 and http://marc.info/?l=openbsd-misc&m=124333936023226&w=2 - I have exactly the same behaviour. The bird-gateway (gw04) produces the following error messages while talking to the quaggas: un 16 11:41:26 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:41:45 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:41:49 cn-ka-gw04 bird: bgp4: Error: Hold timer expired Jun 16 11:41:54 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:42:15 cn-ka-gw04 bird: bgp1: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:42:21 cn-ka-gw04 bird: bgp4: Received error notification: Hold timer expired Jun 16 11:42:32 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:42:46 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:42:50 cn-ka-gw04 bird: bgp1: Error: Hold timer expired Jun 16 11:42:50 cn-ka-gw04 bird: bgp4: Received error notification: Hold timer expired Jun 16 11:43:07 cn-ka-gw04 bird: bgp1: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:43:16 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:43:31 cn-ka-gw04 bird: bgp1: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:43:52 cn-ka-gw04 bird: bgp4: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:44:03 cn-ka-gw04 bird: bgp1: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:44:08 cn-ka-gw04 bird: bgp3: Error: Hold timer expired Jun 16 11:44:17 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:44:22 cn-ka-gw04 bird: bgp4: Error: Hold timer expired Jun 16 11:44:31 cn-ka-gw04 bird: bgp1: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:44:45 cn-ka-gw04 bird: bgp4: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:44:56 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:45:00 cn-ka-gw04 bird: bgp1: Received error notification: Hold timer expired Jun 16 11:45:09 cn-ka-gw04 bird: bgp4: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:45:23 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:45:28 cn-ka-gw04 bird: bgp6: Error: Hold timer expired Jun 16 11:45:28 cn-ka-gw04 bird: bgp1: Error: Hold timer expired Jun 16 11:45:37 cn-ka-gw04 bird: bgp4: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:45:51 cn-ka-gw04 bird: bgp1: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:46:01 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:46:16 cn-ka-gw04 bird: bgp4: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:46:25 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:46:37 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:46:37 cn-ka-gw04 bird: bgp1: Received error notification: Hold timer expired Jun 16 11:46:50 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:46:55 cn-ka-gw04 bird: bgp4: Error: Hold timer expired Jun 16 11:47:06 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:47:10 cn-ka-gw04 bird: bgp1: Error: Hold timer expired Jun 16 11:47:20 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:47:24 cn-ka-gw04 bird: bgp4: Error: Hold timer expired Jun 16 11:47:34 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:47:38 cn-ka-gw04 bird: bgp1: Error: Hold timer expired Jun 16 11:47:49 cn-ka-gw04 bird: bgp2: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:47:54 cn-ka-gw04 bird: bgp4: Error: Hold timer expired Jun 16 11:48:05 cn-ka-gw04 bird: bgp5: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 Jun 16 11:48:09 cn-ka-gw04 bird: bgp1: Error: Malformed AS_PATH: 5002001a02020000322b000033b50301 With "watch netstat -tnp \| grep 179", I see the BGP sessions going up and down. The Quaggas are logging: Jun 16 09:29:23 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 09:31:23 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 09:33:23 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 10:24:15 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 10:29:32 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 10:35:29 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 10:41:18 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 10:58:21 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 11:02:48 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 11:31:36 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by peer Jun 16 11:43:21 cn-ka-gw02 bgpd[4092]: X.X.X.X [Error] bgp_read_packet error: Connection reset by pe Any ideas whats going on here? With kind regards, Dr. Christian Riede Teamleiter Technik -- _________________________________________ =C=O=N=N=E=C=T== Karlsruhe GmbH Computer und Netzwerktechnik Gebrüder-Himmelheber-Straße 7 D-76135 Karlsruhe Amtsgericht Mannheim HRB 110258 Geschäftsführer: Stefan Kratzer Telefon: +49 (0) 721 20120-0 Telefax: +49 (0) 721 20120-500 Internet: www.it-connect.de E-Mail: christian.riede(a)it-connect.de _________________________________________

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Can BIRD be installed on embedded systems?
by ChuYinsu 12 Jun '09

12 Jun '09

Hi, I've tested BIRD on my Linux laptop and it seems that the software works fine : ) Now I've got a question here: All I know is that it's something like embedded system running Linux kernel Just like some chips on a board, no display, no input, etc., but with several Ethernet Interfaces. Can I successfully install BIRD on this? If all BIRD requires is the Linux kernel, I think maybe it's "yes". Someone did this before? Thanks!

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New release 1.0.15
by Ondrej Filip 03 Jun '09

03 Jun '09

Hi guys, we have a new release. What is new? o FreeBSD and NetBSD port renewed. OpenBSD port introduced. o import/preimport 'show route' modifiers was renamed to export/preexport for consistency with filters. o Minor change in the grammar of 'interface' config option. o Many bugfixes in IPv6 BGP. o As usual, miscellaneous bugfixes. There is an issue with BGP MD5 authentication on BSD system. The password has to be set by external utility. We will work on it in some next release. However BSD is port is working again and you can use BGP MD5 authentication. Ondrej

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When adding virtual network interfaces, BIRD crashes sometimes...
by ChuYinsu 22 May '09

22 May '09

Hi, When I'm using uml-utilities, specifically the command: sudo tunctl -t tap0 -u test sudo ifconfig tap0 11.1.1.2/16 Or, I've already had virtual network interfaces, I want to delete them: sudo tunctl -d tap0 Sometimes after entering these commands, BIRD(version 1.0.14, alreay been running OSPF protocol) works well and creates new LSAs to flood; but sometimes it crashes.But when I plug in or pull out a twisted pair of a real network interface, it seems that BIRD don't crash. So maybe it's a problem of the "virtual" interface as I thought when testing. But when actually using BIRD for routing in the lab maybe there's no chances to use virtual interfaces. So just reporting this bug. In the debugging file, here may be the related line: May 15 14:24:24 test-ubuntu kernel: [ 292.820382] bird[3797]: segfault at e0000021 ip 08065f83 sp bfee6590 error 5 in bird[8048000+45000] Thanks!

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