December 2014 - Bird-users

New in BIRD
by Ilias Pallikarakis 23 Aug '16

23 Aug '16

Hi, I recently started trying to learn BIRD. I should also mention I have no previous experience with any other Routing daemon either. I want to configure a bgp monitor for both ipv4 and ipv6. I am running BIRD in a Ubuntu 13.10 VM. I managed to install both bird and bird6 but I have some problems with the configurations. In ipv4 : I created a very simple configuration which I attach. The conf is compiled but in birdc the bgp session is considered idle. I tried to do a tcpdump and found that the router sends a TCP SYN on the VM's bgp port but the VM responds with a RST and never tries to set a BGP session itself. In ipv6 : No matter the configuration (my configuration or the sample coming with bird6 or examples found on the web) the configuration is not compiled giving the following error : BIRD ipv6 doesn't run (bird: /usr/local/etc/bird6.conf, line 1: Router ID must be configured manually on IPv6 routers) Could anyone give me some pointers on what I am doing wrong ? Thank you for your help, Ilias Pallikarakis

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Bird as an MPLS RR
by Evelio VILA 16 Feb '16

16 Feb '16

Hi guys, I'm following the instructions from http://bird.mpls.in/projects/mpls-bird/wiki/Bird_rr but I get a syntax error when adding the table statements. I'm using Bird 1.4.5 for Ubuntu utopic installed from this ppa: deb http://ppa.launchpad.net/cz.nic-labs/bird/ubuntu utopic main deb-src http://ppa.launchpad.net/cz.nic-labs/bird/ubuntu utopic main But it seems that version is not yet compiled for VPNv4 (AFI/SAFI 1/128) capabilities. already checked this link with no luck... https://www.mail-archive.com/bird-users%40atrey.karlin.mff.cuni.cz/msg03141… any ideas? Thanks! Evelio Vila

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IS-IS
by kveri new 01 Jun '15

01 Jun '15

Hello, I would like to implement IS-IS as a part of my master thesis. Are there any apparent problems which would prevent successful implementation, political and/or technical? Also I would like to hear opinions of the authors. Implementation timeframe is 2013 (if we live past 21th). Regards, Martin Čechvala Faculty of Informatics and Information Technologies Slovak Technical University

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OSPF route selection
by Thomas Goldberg 22 May '15

22 May '15

Hello, we're using OSPF for anycast routing and came across a small problem. We've a BIRD v1.4.4 router which sits in area 0 and 16. Here's the relevant state information (10.236.144.144/32 is announced from two different routers in two areas): area 0.0.0.0 router 10.236.144.241 distance 33 external 10.236.144.144/32 metric 1 area 0.0.0.16 router 10.17.224.253 distance 111 external 10.236.144.144/32 metric 1 The route via area 16 is considered best: 10.236.144.144/32 via 10.176.3.29 on vlan542 [o_internal 2014-10-07 16:49:56] * E1 (150/112) [10.17.224.253] Given that both E1 routes are reachable via intra-area paths. We're wondering why the path via area 16 (higher costs than area 0) is chosen. Is this the intended behavior? Is there any way to make bird prefer routes via a specific/backbone area in a situation like this? Best Regards, Freddy

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BGP Link Bandwidth Extended Community?
by dave seddon 12 Jan '15

12 Jan '15

Greetings, Sorry for the dumb question, but I'm trying to work out how to set the extended communities. Anybody know how to set the Link Bandwidth Extended communities? As defined here: https://tools.ietf.org/html/draft-ietf-idr-link-bandwidth-04 Where we're hoping to do this: http://www.juniper.net/techpubs/en_US/junos14.1/topics/topic-map/bgp-multip… Basically, need to set the community to: " This document defines a specific application of the two-octet AS specific extended community. IANA is requested to assign a sub- type value of 0x04 for the link bandwidth extended community. Name Value ---- ----- non-transitive Link Bandwidth Ext. Community 0x4004 " I've been reading at the data types section of the bird doco ( http://bird.network.cz/?get_doc&f=bird-5.html ), and trying different way for a while now, and just don't seem to be able to get it right. e.g. export filter { bgp_ext_community.add((4, 65300, 999)); accept; }; ( Mostly stolen from this nice example: http://bird.mpls.in/projects/mpls-bird/wiki/Bird_pe/2 ) On a juniper this is a config to apply a link bandwidth community: ------------------------- protocols { bgp { group CORE { type internal; description "core full mesh"; passive; log-updown; family inet { unicast; } family inet-vpn { unicast; } export [ beer ]; peer-as 65300; local-as 65300; multipath; neighbor 10.1.0.2 { description bird1; local-address 10.1.0.1; } } } policy-options { policy-statement beer { from { route-filter 9.9.9.9/32 exact; } then { community add beer; accept; } } community beer members bandwidth:65300:9999; } ------------------------- So the community "beer" has this value "bandwidth" which the junos knows is 0x04. In bird it looks like this: ------------------------- bird> show route 9.9.9.9/32 all 9.9.9.9/32 via 10.1.0.1 on VLAN100 [core 17:38:44] * (100/0) [i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: BGP.next_hop: 10.1.0.1 BGP.local_pref: 100 BGP.ext_community: (unknown 0x4, 65300, 1176255488) ------------------------- When tcpdump-ed the update has the values: 0x0004 ff14 461c3c00 Attached is the pcap of the bgp update with the community value set via the juniper. Kind regards, Dave

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QNX port of Bird 1.4.5, corrupt linked lists?
by Pendzik, Edward 11 Dec '14

11 Dec '14

Thu Dec 11 01:46:41 EST 2014 Hello. I am working on porting bird 1.4.5 to QNX SP1 (QNX OS service pack 1). QNX is actually close to BSD and there have been very few changes to the code. I have bird built but I get a core dump on initialization. I was hoping that someone could give me some specific ideas on exactly where to look while debugging. I have many years of writing and debugging Linux and Solaris drivers and networking code, but I am not yet familiar with the bird internal data structures. I tried building with and without pthreads. I get a core dump both ways, in different spots, both when calling WALK_LIST() with a list. // with pthreads #0 0x00111460 in if_notify_change (c=1, i=0x187050) at ../../nest/iface.c:218 218 WALK_LIST(p, active_proto_list) // without pthreads if_start_update () at ../../nest/iface.c:338 338 WALK_LIST(i, iface_list) I also turned off the '#define POISON' in lib/slab.c, and on a different run did a bzero() instead of a memset(POISON). Neither changed the results. Attached find my bird.conf Any hints would be appreciated. PS Something else weird. I get an error when bird starts up and parses bird.conf. 'protocol device' rejects 'interface "en0";', even though en0 is the correct name of my ethernet interface, and ifconfig shows it exists and is up with an ipaddr. protocol device { interface "en0"; } % ifconfig lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33192 inet 127.0.0.1 netmask 0xff000000 wip0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500 address: 01 en0: flags=80008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,SHIM> mtu 1500 address: 00:80:0f:9e:08:74 media: Ethernet 100baseTX full-duplex status: active inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255 Thanks, Ed Pendzik ependzik(a)harris.com //------------------------------------------------------------ btop="/fs" confopts="\ --sysconfdir=$btop \ --localstatedir=$btop \ --prefix=$btop \ CC=$HOME/qccbird \ CFLAGS=-V4.4.2,gcc_ntoarmle \ --disable-pthreads \ --build=i686-pc-linux-gnu \ --host=arm-unknown-nto-qnx6.5.0 \ --with-sysconfig=qnx \ --with-protocols=ospf,pipe,static,bfd,rip \ --enable-debug \ --disable-client \ " ./configure $confopts //------------------------------------------------------------ // WITH PTHREADS (--enable-pthreads) // console output 117.localhost_root 2014-12-11 06:10:06 <TRACE> direct1: Initializing 2014-12-11 06:10:06 <TRACE> kernel1: Initializing 2014-12-11 06:10:06 <TRACE> device1: Initializing 2014-12-11 06:10:06 <TRACE> ospf1: Initializing 2014-12-11 06:10:06 <TRACE> device1: Starting 2014-12-11 06:10:06 <TRACE> device1: Scanning interfaces @@@ if_notify_change: this is debug() @@@ if_notify_change: this is DBG() Interface change notification (1) for lo0 IF1: lo0 UP LINK-UP MA LOOP IGN MTU=33192 127.0.0.1, net 127.0.0.0/8 bc 0.0.0.0 -> 0.0.0.0 DOWN unlinking old /fs/coredumps/bird.core dumping to /fs/coredumps/bird.core thread 1.flags is 0x1 thread 1 is was SIGNALLED thread 1.why is 0x1 ldd mapinfos: Thread 1's SP is at 0xff7d4 Adjusting 24576 bytes @ 0xfa000->0x100000 to 4096 bytes @ 0xff000->0x100000 thread 1 is current thread! blanking 24576 bytes of stack memory at 0xff000 max=0x6000, min = 0x5000 (0xff000->0x100000) dumping 483328 bytes of memory at 0x100000 dumping 8192 bytes of memory at 0x176000 dumping 4096 bytes of memory at 0x178000 dumping 135168 bytes of memory at 0x179000 dumping 471040 bytes of memory at 0x1000000 dumping 16384 bytes of memory at 0x1073000 dumping 4096 bytes of memory at 0x1077000 dumping 172032 bytes of memory at 0x78000000 dumping 24576 bytes of memory at 0x7802a000 ntoarm-gdb bird bird.core GNU gdb 6.8 qnx-nto (rev. 506) Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-unknown-nto-qnx6.5.0"... Reading symbols from /home2/opt/qnx650sp1/target/qnx6/armle/lib/libsocket.so.3...done. Loaded symbols for /home2/opt/qnx650sp1/target/qnx6/armle/lib/libsocket.so.3 Reading symbols from /home2/opt/qnx650sp1/target/qnx6/armle/lib/libc.so.3...done. Loaded symbols for /home2/opt/qnx650sp1/target/qnx6/armle/lib/libc.so.3 Program terminated with signal 10, Bus error. [New pid 1708126 tid 1] #0 0x00111460 in if_notify_change (c=1, i=0x187050) at ../../nest/iface.c:218 218 WALK_LIST(p, active_proto_list) (gdb) whete Undefined command: "whete". Try "help". (gdb) where #0 0x00111460 in if_notify_change (c=1, i=0x187050) at ../../nest/iface.c:218 #1 0x00111624 in if_change_flags (i=0x187050, flags=1073742306) at ../../nest/iface.c:254 #2 0x00111988 in if_end_partial_update (i=0x187050) at ../../nest/iface.c:350 #3 0x00111a34 in if_end_update () at ../../nest/iface.c:368 #4 0x0015a184 in kif_do_scan (p=0x18a528) at krt-sock.c:894 #5 0x0015ab0c in kif_scan (t=0x1860d0) at krt.c:98 #6 0x0015af64 in kif_start (P=0x18a528) at krt.c:191 #7 0x0010e22c in proto_rethink_goal (p=0x18a528) at ../../nest/proto.c:632 #8 0x0010dff0 in protos_commit (new=0x18f9a8, old=0x0, force_reconfig=0, type=1) at ../../nest/proto.c:580 #9 0x00151df0 in config_do_commit (c=0x18f9a8, type=1) at conf.c:255 #10 0x00152030 in config_commit (c=0x18f9a8, type=1, timeout=0) at conf.c:348 #11 0x0015f788 in main (argc=2, argv=0xff944) at main.c:822 (gdb) //------------------------------------------------------------ // WITHOUT PTHREADS (--disable-pthreads) // console output 128.localhost_root 2014-12-11 06:15:41 <TRACE> direct1: Initializing 2014-12-11 06:15:41 <TRACE> kernel1: Initializing 2014-12-11 06:15:41 <TRACE> device1: Initializing 2014-12-11 06:15:41 <TRACE> ospf1: Initializing 2014-12-11 06:15:41 <TRACE> device1: Starting 2014-12-11 06:15:41 <TRACE> device1: Scanning interfaces dumping to /fs/coredumps/bird.core thread 1.flags is 0x1 thread 1 is was SIGNALLED thread 1.why is 0x1 ldd mapinfos: Thread 1's SP is at 0xff828 Adjusting 24576 bytes @ 0xfa000->0x100000 to 4096 bytes @ 0xff000->0x100000 thread 1 is current thread! blanking 24576 bytes of stack memory at 0xff000 max=0x6000, min = 0x5000 (0xff000->0x100000) dumping 483328 bytes of memory at 0x100000 dumping 8192 bytes of memory at 0x176000 dumping 4096 bytes of memory at 0x178000 dumping 98304 bytes of memory at 0x179000 dumping 471040 bytes of memory at 0x1000000 dumping 16384 bytes of memory at 0x1073000 dumping 4096 bytes of memory at 0x1077000 dumping 172032 bytes of memory at 0x78000000 dumping 24576 bytes of memory at 0x7802a000 ntoarm-gdb bird bird.core GNU gdb 6.8 qnx-nto (rev. 506) Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-unknown-nto-qnx6.5.0"... warning: Host file /home2/opt/qnx650sp1/target/qnx6/armle/lib/libsocket.so.3 does not match target file. warning: Host file /home2/opt/qnx650sp1/target/qnx6/armle/lib/libc.so.3 does not match target file. Reading symbols from /home2/opt/qnx650sp1/target/qnx6/armle/lib/libsocket.so.3...done. Loaded symbols for /home2/opt/qnx650sp1/target/qnx6/armle/lib/libsocket.so.3 Reading symbols from /home2/opt/qnx650sp1/target/qnx6/armle/lib/libc.so.3...done. Loaded symbols for /home2/opt/qnx650sp1/target/qnx6/armle/lib/libc.so.3 Program terminated with signal 11, Segmentation fault. [New pid 2158686 tid 1] #0 0x001118c0 in if_start_update () at ../../nest/iface.c:338 338 WALK_LIST(i, iface_list) (gdb) bt #0 0x001118c0 in if_start_update () at ../../nest/iface.c:338 #1 0x0015a0fc in kif_do_scan (p=0x18a528) at krt-sock.c:892 #2 0x0015aa9c in kif_scan (t=0x1860d0) at krt.c:98 #3 0x0015aef4 in kif_start (P=0x18a528) at krt.c:191 #4 0x0010e1bc in proto_rethink_goal (p=0x18a528) at ../../nest/proto.c:632 #5 0x0010df80 in protos_commit (new=0x18f9a8, old=0x0, force_reconfig=0, type=1) at ../../nest/proto.c:580 #6 0x00151d80 in config_do_commit (c=0x18f9a8, type=1) at conf.c:255 #7 0x00151fc0 in config_commit (c=0x18f9a8, type=1, timeout=0) at conf.c:348 #8 0x0015f6cc in main (argc=2, argv=0xff944) at main.c:822 (gdb)

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'Netlink: File exists' messages out of bird6
by Michael Fincham 01 Dec '14

01 Dec '14

Hi all, I'm periodically seeing bird6 log these message (and get rate limited, which implies there were quite a few at once...) Nov 30 03:38:17 wlg-por-router2 bird6: Netlink: File exists Nov 30 03:38:17 wlg-por-router2 bird6: ... Any hints on how best to troubleshoot this? -- Michael

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