November 2009 - Bird-users

config syntax checker
by Wolfgang Hennerbichler 19 Nov '09

19 Nov '09

Dear Bird Users, we (Vienna Internet Exchange) are one step closer to deploying bird into beta for our exchange - we have an automated configuration generation tool that grabs all data from our database and creates a bird.conf (ipv6 support is on it's way). Now the same tool that generates the configuration will also reload bird. As all this doesn't need human intervention it would be great to find out - before reloading bird - if the configuration file is syntactically correct (I realize that bird doesn't crash or anything if it can't read the config, but I need to know it anyway) - is there a way to find out if bird would accept the config-file - other than calling configure soft from birdc and parsing the output? Ideally I'd like to call 'bird -c /etc/bird.conf --check-config' and check the return-status of this script. I guess this wouldn't be hard to do, would it? Wolfgang -- www.vix.at | www.aco.net wh(a)univie.ac.at | WH844-RIPE Vienna University Computer Center

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default bgp_med not working
by Wolfgang Hennerbichler 19 Nov '09

19 Nov '09

Hi Birdies, I've got a good reason to belive that the option 'default bgp_med' is not working (at all), at least in my setup. I do something like this in a filter: export filter { if from = 1.2.3.4 then { print bgp_med; print from; print net; bgp_med = bgp_med + 1; accept; } and I have output like that: 0 1.2.3.4 194.0.2.0/24 0 1.2.3.4 194.0.1.0/24 (void) 1.2.3.4 213.135.40.0/23 (void) 1.2.3.4 213.135.32.0/21 0 1.2.3.4 143.224.0.0/16 => those void's are disturbing, aren't they? Even adding the option default bg_med 10 doesn't change the bgp metric. So I guess I found a bug? I could only work around it by setting the bgp_med in the import filter. Wolfgang -- www.vix.at | www.aco.net wh(a)univie.ac.at | WH844-RIPE Vienna University Computer Center

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RIP question
by David J Craigon 18 Nov '09

18 Nov '09

Hello, Me again, I'm afraid. What does "AUTH: MD5 protected packet with lower numbers" mean? I'm using RIP to talk to Quagga RIP. Sometimes it works, and sometimes I get this. David

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log file getting too big
by David J Craigon 18 Nov '09

18 Nov '09

Hello, A bug report / feature request. I'm using the log "" command to log to a file. 1) The file seems to have a 2Gb limit on file size. 2) When the file gets to 2Gb, bird crashes. Can you make 1) use the large file things so it can be bigger than 2Gb, and can I suggest that 2) is not the right answer- the log file not being available seems like a really bad reason to bring down the entire network. Thanks, David

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SNMP monitoring
by David J Craigon 17 Nov '09

17 Nov '09

Hello, a) I'm trying to monitor bird via SNMP so I can put it into Nagios. I want alerts to go off when a routing protocol session goes down, or if I am receiving not an defined number of routes. Any ideas? b) With the aim of achieving a) I am trying to write something automatic using birdc: Basically I'm trying run birdc from a program. The program will type commands into birdc, then act on the information. Here is my problem. You can recreate it by doing "birdc > file" and then examining file afterwards. Here's what I got: " BIRD 1.1.4 ready. bird> show protocols bird> ^M^[[Kname proto table state since info bgp_export Static master up Oct18 direct1 Direct master up Oct18 kernel1 Kernel master up Oct18 device1 Device master up Oct18 ebgp BGP master up Nov13 Established bogons Static master down Nov12 rip1 RIP master up Nov12 ibgp BGP master up Nov16 Established bird> exit " What's with the bird> ^M^[[K bit? I'm guessing it brings it back to the beginning of the line. Why does it do this? David

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RIP / OSPF co-operation
by asaf＠lingnu.com 16 Nov '09

16 Nov '09

is it possible to share routing information retrieved by one protocol with other protcol ? say my router runs both RIP and OSPF, is it possible to broadcast information retrieved by RIP, through the OSPF protocol ?

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Re: problems: bird on ulibc openwrt with ospf
by Thomas Osterried 06 Nov '09

06 Nov '09

Hello, > this is not related to bird, > just want to know how you are able to get two channels on the wrt54g, > im about to obtain one in a few days and was under the impression that > it's card supports only 2.4 ghz. I'll make it short here. The rest could be discussed in a private thread. I'm member of a non-commercial ISP (Club Individual Network Berlin e.V., AS29670); we offer Internetaccess and -services for private persons, clubs and NGOs. In the street Lehrterstr. in Berlin we have built up a public access WLAN, and our users can use a pptp or openvn tunnel to gain access to the internet. WLAN 2.4GHz becomes overcrowded, as you may already noticed. The house we like to mordernize the equipment has a linksys WRT54GL. Inhouse we have classic TP ethernet to the apartments, connected to the 4-port switch of the linksys AP. Our improvement will be, that we add an ubiquiti Nanostation5 to the WAN port of the linksys router (the NS5 is configured as WDS bridge - that means that the remote side looks as directly connected). This way we could use the new 5GHz link, and we still have the builtin 2.4GHz card in the linksys AP being active. With bird/OSPF the priority will be on the 5GHz link, and if it fails, we have the old 2.4GHz link as fallback. I'm not a fan of routing protocols like OLSR. That's why I'd like to deploy bird for our project. Regards, - Thomas Osterried

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problems: bird on ulibc openwrt with ospf
by Thomas Osterried 06 Nov '09

06 Nov '09

Hello, I posted this to the list a few days ago (before I subscribed), but Jann told me that my posting did not occur on the list. Here we go: ----- Forwarded message from Thomas Osterried <thomas(a)x-berg.in-berlin.de> -----

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Importing kernel routes
by Jann Traschewski 06 Nov '09

06 Nov '09

Ahoj, I want to import the following route into the bird: db0fhn:~# ip route show table 230 44.4.28.50 via 75.101.49.52 dev tunl0 onlink The syslog shows: Oct 19 19:21:49 db0fhn bird: Kernel told us to use non-neighbor 75.101.49.52 for 44.4.28.50/32 I'm pretty sure to add this route to the bird for redistribution via BGP4. My config: protocol kernel { learn; # Learn all alien routes from the kernel persist; # Don't remove routes on bird shutdown scan time 20; # Scan kernel routing table every 20 seconds export all; # Default is export none kernel table 230; # Kernel table to synchronize with (default: main) } My version: 1.1.4 (Debian/Lenny) How can I solve this problem? Thank you, Jann Traschewski -- Jann Traschewski, Drosselstr.1, D-90513 Zirndorf, Germany Tel.: +49-911-696971, Mobile: +49-170-1045937, E-Mail: jann(a)gmx.de

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problems: bird on ulibc openwrt with ospf
by None 03 Nov '09

03 Nov '09

Hello, I got in touch with bird after your great presentation at the ripe meeting. I like to use bird on small embeded WLAN routers like the linksys WRT54g, running OpenWRT kamikaze, a uLibc linux system. I've spent several days in getting my configuration running. From today on, it does work (more ore less) and I'd like to describe my problems. I started with bird 1.1.4 (and today 1.1.5) - both birds have the same problem. I cross-compiled bird for uLibc mipsel myself. bird 1.1.5 is only 390252 bytes large (striped, compiled without CFLAG -g); bird 1.1.4 was a bit smaller. Because free flash storage is a problem on these plattforms, I did not use the birdc control program. Instead, I configured bird with log stderr all; debug protocols all; and I started bird with /usr/sbin/bird -c /etc/bird.conf -s /tmp/bird.ctl -d & on both routers. This way I could see what's going on. Bird told it was learning the routes (from OSPF between the two embeded routers), but they did not appear in the kernel routing table. I even used strace and ltrace and saw that bird did not do any system- or library-calls for setting routes. The debug output has not told me why. Unfortunately, bird does only listen on unix sockets. With 256k free "disk" space I could not install birdc, because it depends on libncurses. libncurses is 258343 bytes large. Wrapper programs like socat are also too big. It would be nice if birdc could be used to speak over tcp to the remote system's bird.. Today I copied libncurses and birdc to /tmp (ramfs) and symlinked libncurses to /usr/lib. After this, I was able to use birdc and saw what's going on. linux kernel routing table: # route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.25.193.248 * 255.255.255.248 U 0 0 0 br-wlan50LINK 10.25.193.128 10.25.193.64 255.255.255.248 UG 0 0 0 br-lan 10.25.190.248 * 255.255.255.248 U 0 0 0 br-wlan24LINK 10.25.193.144 10.25.193.65 255.255.255.248 UG 0 0 0 br-lan 10.25.193.224 * 255.255.255.240 U 0 0 0 br-wlan24USER 10.25.193.0 * 255.255.255.128 U 0 0 0 br-lan bird> sh ro 10.0.0.0/8 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] E2 (150/10/10000) 10.25.193.224/28 dev br-wlan24USER [direct1 12:56] (240) 10.25.190.248/29 dev br-wlan24LINK [direct1 12:56] (240) dev br-wlan24LINK [ospf1 12:57] I (150/20) 10.25.193.248/29 dev br-wlan50LINK [direct1 12:56] (240) dev br-wlan50LINK [ospf1 12:57] I (150/10) 192.168.1.0/24 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] IA (150/20) 127.0.0.0/8 dev lo [direct1 12:56] (240) 10.25.193.0/24 dev lo [static1 12:56] (1000) 10.25.193.0/25 dev br-lan [direct1 12:56] (240) 10.25.190.0/24 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] E2 (150/10/10000) 10.25.190.0/25 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] E2 (150/10/10000) -> as you can see, the kernel did not learn the routes from the ospf neighbor (10.25.193.254) like 10/8, 10.25.190.0/25, etc. "sh protocols" shows that all protocols are running. I assumed that "sh ro" should tell me also about kernel routes - but it doesn't. Here's the solution: bird> disable kernel1 kernel1: disabled bird> enable kernel1 kernel1: enabled bird> show route 0.0.0.0/0 via 10.25.193.254 on br-wlan50LINK [ospf1 13:03] E2 (150/20/10000) 192.168.99.0/24 via 10.25.193.254 on br-wlan50LINK [ospf1 13:03] E2 (150/20/10000) 10.0.0.0/8 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] E2 (150/10/10000) 10.25.193.224/28 dev br-wlan24USER [direct1 12:56] (240) 10.25.190.248/29 dev br-wlan24LINK [direct1 12:56] (240) dev br-wlan24LINK [ospf1 12:57] I (150/20) 10.25.193.248/29 dev br-wlan50LINK [direct1 12:56] (240) dev br-wlan50LINK [ospf1 12:57] I (150/10) 192.168.1.0/24 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] IA (150/20) 127.0.0.0/8 dev lo [direct1 12:56] (240) 10.25.193.0/24 dev lo [static1 12:56] (1000) 10.25.193.0/25 dev br-lan [direct1 12:56] (240) 10.25.193.128/29 via 10.25.193.64 on br-lan [kernel1 13:02] (10) 10.25.190.0/24 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] E2 (150/10/10000) 10.25.190.0/25 via 10.25.193.254 on br-wlan50LINK [ospf1 12:57] E2 (150/10/10000) 10.25.193.144/29 via 10.25.193.65 on br-lan [kernel1 13:02] (10) and now the linux kernel routing table looks like this: # route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.25.193.248 * 255.255.255.248 U 0 0 0 br-wlan50LINK 10.25.193.128 10.25.193.64 255.255.255.248 UG 0 0 0 br-lan 10.25.190.248 * 255.255.255.248 U 0 0 0 br-wlan24LINK 10.25.193.144 10.25.193.65 255.255.255.248 UG 0 0 0 br-lan 10.25.193.224 * 255.255.255.240 U 0 0 0 br-wlan24USER 10.25.190.0 10.25.193.254 255.255.255.128 UG 0 0 0 br-wlan50LINK 10.25.193.0 * 255.255.255.128 U 0 0 0 br-lan 10.25.190.0 10.25.193.254 255.255.255.0 UG 0 0 0 br-wlan50LINK 192.168.1.0 10.25.193.254 255.255.255.0 UG 0 0 0 br-wlan50LINK 192.168.99.0 10.25.193.254 255.255.255.0 UG 0 0 0 br-wlan50LINK 10.25.193.0 * 255.255.255.0 U 0 0 0 lo 10.0.0.0 10.25.193.254 255.0.0.0 UG 0 0 0 br-wlan50LINK default 10.25.193.254 0.0.0.0 UG 0 0 0 br-wlan50LINK Ok, that's fine now. But I cannot do this without manually disable-/enableing protocol kernel1 via birdc. Do you have any ideas what causes this problem? As you can see, it's beautiful with bird to set up two direct paths to the same ospf neighbor: the first is a the primary wlan link on 5GHz with high ospf priority and the second is a backup wlan link on 2.4GHz with lower ospf priority If 5GHz fails, the 2.4GHz link is used, at both sides. Btw, when do you expect bird's ospf will learn the NSSA (not-so-stubby area) feature? Regards, - Thomas PS: I'm not subscribed to the mailing-list yet. ----- End forwarded message -----

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