August 2011 - Bird-users

upgrade 1.2.4 - 1.3.1 reverted
by Arjan Filius 24 Oct '12

24 Oct '12

Hello, upgraded from bird 1.2.4 to bird 1.3.1 last weekend, but needed to revert due to complaints from high bgp traffic to bgpmon.net and 100% cpu load on a 2x bird bgp routers setup connected with iBGP. Did some research, and noticed a high bgp traffic situation on the iBGP sessions (about 10.000 bgp packets in 1.7 second) Based on graph statistics, i noticed a irregular traffic on the trans-ip's as well (noticed after rollback in statistical graphs) In the logging (mostly on the first bgp router) , i noticed quite some messages (33414 in ~12h) like: 29-05-2011 10:57:49 <WARN> Next hop address X.X.X.242 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:49 <WARN> Next hop address Y.Y.35.194 resolvable through recursive route for Y.Y.32.0/19 29-05-2011 10:57:52 <WARN> Next hop address X.X.X.241 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:52 <WARN> Next hop address X.X.X.242 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:55 <WARN> Next hop address Y.Y.35.194 resolvable through recursive route for Y.Y.32.0/19 29-05-2011 10:57:55 <WARN> Next hop address X.X.X.241 resolvable through recursive route for X.X.X.0/24 29-05-2011 10:57:55 <WARN> Next hop address X.X.X.242 resolvable through recursive route for X.X.X.0/24 These are the subnets of the upstream trans-ip links of it's neigbor router On the second (neighbor) bgp router, noticed only such 15 recursive messages I had those upstream trans-ip interface IP's manually added once to the bird.conf with a "protocol static" definition with a subnet of /32. I thought this might be the problem, and wel, disabled those static trans-ip interface routes, except i forgot one. Noticed a lower CPU afterwards, but problem persisted, and i reverted to 1.2.4. Later i noticed i missed one static route to disable, but no time left to upgrade and test again. I think i should have looked at the recursive routes in bird, but i didn't. Does one know what was going on here, and what to do to prevent it when executing another upgrade? I created a 10.000 packet tcpdump capture (full size) of an iBGP session, in case somone would like to look at it. Regards, Arjan Filius -- Arjan Filius mailto:iafilius@xs4all.nl

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OSPF loading State
by Ryan Whelan 09 Jan '12

09 Jan '12

I have 2 linux machines connected to one another over the internet via a IPSec protected GRE tunnel. Each of them are running OSPF from bird 1.3.2. The issue is that one of them will not fully peer with the other, unless the other is started after the one with the issue. Is just stays in state 'loading' while the other machine will be in state 'full'. In other words, node 2 will only go to state 'full' if node 1 is started after node 2. If node 2 is started after node 1, it will sit in state 'loading' forever. Node 1 has no issues. Here is a log from the node that is failing to sync up (node 2): http://pastebin.com/ZjVcc1wB bird> show ospf neighbors axa0: Router ID Pri State DTime Interface Router IP 111.222.333.444 1 loading/ptp 00:13 tun10 172.31.255.255 bird> the config on both machines is identical protocol kernel { learn;; persist; scan time 20; export all; } protocol device { scan time 10; } protocol static { } protocol ospf axa0 { tick 1; rfc1583compat yes; area 0.0.0.0 { stub no; interface "tun*" { hello 5; retransmit 5; cost 10; transmit delay 5; dead 15; wait 50; type ptp; }; }; }

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Make bird 1.3.2 failed
by Alexander V. Pen'kov 26 Oct '11

26 Oct '11

Good day! I have Centos 5.6 with all lastest updates(exec yum update). And i would like to install bird 1.3.2(bird 1.3.1 installed successfuly) but when i execute "make" it not successfuly done with result: make[2]: Leaving directory `/usr/src/bird-1.3.2/obj/client' gcc -o ../bird nest/all.o filter/all.o proto/bgp/all.o proto/ospf/all.o proto/pipe/all.o proto/rip/all.o proto/static/all.o conf/all.o lib/birdlib.a -lrt lib/birdlib.a(main.o): In function `drop_uid': /usr/src/bird-1.3.2/obj/lib/../lib/syspriv.h:49: undefined reference to `CAP_TO_MASK' /usr/src/bird-1.3.2/obj/lib/../lib/syspriv.h:49: undefined reference to `CAP_TO_MASK' /usr/src/bird-1.3.2/obj/lib/../lib/syspriv.h:49: undefined reference to `CAP_TO_MASK' /usr/src/bird-1.3.2/obj/lib/../lib/syspriv.h:49: undefined reference to `CAP_TO_MASK' collect2: ld returned 1 exit status make[1]: *** [../bird] Error 1 make[1]: Leaving directory `/usr/src/bird-1.3.2/obj' make: *** [all] Error 2 What is this problem? Thanks! -- Alexandre V. Pen'kov mailto:shurskiy@gmail.com Mobile: +7(916)591-9113

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how to confirm which capabilities have been negotiated
by Eiichiro Watanabe 24 Oct '11

24 Oct '11

Hello, Do we have an appropriate command to show which BGP capabilities have been negotiated on bird after a peer has been established? Of course, I known I can recognize when I look into packets captured, or confirm it on the neighbor router by using "show ip bgp neighbor x.x.x.x" command (in the case of CiscoIOS). it wouldn't be smart. Thanks, eiichiro -- ################################################### Eiichiro Watanabe Internet Multifeed Co.

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New release 1.3.2!
by Ondrej Filip 21 Oct '11

21 Oct '11

Hi! New version is ready! It includes mainly minor bugfixes and minor improvements all made by Santiago. We are working on packaging and other stuff. Changes: Version 1.3.2 o Allows run with restricted privileges. o Community list filter operation. o Fixes several problems in filter syntax: - Fixes several conflicts in the grammar. - Fixes a bug in (a..b, c) pair patterns. - Makes pair patterns orthogonal. - Allows term expressions in pair patterns without additional (). - Allows several comma separated values in switch cases. o Many bugfixes. Ondrej

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Looking-Glass
by Mihai Claudiu Capatina 29 Sep '11

29 Sep '11

Hi, Does anybody know about an open-source looking-glass for BIRD ? Best Regards, Mihai Claudiu Capatina Managing Partner Vector Communications SRL Address : Aleea Cetatuia, Nr. 4, Bl. M22, Sc. 5, Et. 2, Ap. 276, Sect. 6, Bucuresti, 060834 Romania Phone: +40-729-087003 Fax: +40-318-146297 www.vector-communications.net

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Show BGP peer data when session is down?
by Lars-Johan Liman 14 Sep '11

14 Sep '11

If you have an established BGP session, you can find out a lot of the session details using # birdc show protocols all <bgp_proto_id> Specifically, you can look at BGP state: ... Session: ... Neighbor AS: ... Neighbor ID: ... Neighbor address: ... Nexthop address: ... Source address: ... Neighbor caps: ... Route limit: ... Hold timer: ... Keepalive timer: ... Now, if the session is terminated for one reason or another, the info disappears. BGP state: Passive Last error: Received: Administrative shutdown and that's it. This makes it very hard to create scripts that keep an eye on specific peering sessions based on the identity (remote IP address) of the peer, because once the session is down, you can no longer find it, because the IP address is nowhere in the output. :-P Is there a birdc command that shows me BGP session info including the _expected_ peer info, as configured, so I can identify my sessions and keep an eye on them as they come and go? I have mentally explored two alternative ways: a) To code the remote IP into the BGP protocol identifier for that particular session and make my script match on that, or b) to parse the BIRD config file to establish the mapping between a certan BGP protocol identifier and the corresponding remote IP. Both strike me as "suboptimal" ... :-/ If the answer to my question above is "no", please consider this a feature request ... ;-) Cheers, /Liman #---------------------------------------------------------------------- # Lars-Johan Liman, M.Sc. ! E-mail: liman(a)netnod.se # Senior Systems Specialist ! Tel: +46 8 - 562 860 12 # Netnod Internet Exchange, Stockholm ! http://www.netnod.se/ #----------------------------------------------------------------------

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debian/ubuntu init script
by Alex Bligh 14 Sep '11

14 Sep '11

Can I recommend you introduce something like the following patch (taken straight from the ubuntu skeleton file), which will source /etc/default/bird if it is present. This will remove the need for me to fiddle with my /etc/init.d/bird file. Similar considerations presumably apply for the bird6 init file. -- Alex Bligh diff -u etc/init.d/bird{.orig,} --- etc/init.d/bird.orig 2011-05-02 19:33:41.363090697 +0100 +++ etc/init.d/bird 2011-08-18 08:39:01.952013376 +0100 @@ -25,6 +25,9 @@ # Exit if the package is not installed [ -x "$DAEMON" ] || exit 0 +# Read configuration variable file if it is present +[ -r /etc/default/$NAME ] && . /etc/default/$NAME + # Load the VERBOSE setting and other rcS variables . /lib/init/vars.sh

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FreeBSD and CARP
by fredrik danerklint 04 Sep '11

04 Sep '11

Hi! I can't remember if I read it here on the list but does carp and bird work under freebsd? As of now, even if a carp interface is in backup mode, bird announce that prefix over ospf, which I don't want... -- //fredan

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question about bgp_med
by fredrik danerklint 23 Aug '11

23 Aug '11

Hi! Is this possible in either a import or export filter: bgp_med = bgp_med + 3; -- //fredan

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