November 2015 - Bird-users

Crash in Bird function kif_choose_primary()
by Wei Huang 20 Nov '15

20 Nov '15

I am using Bird on my system, and when I change config (use different interfaces for OSPF, from using tap-0, tap-4 to tap-0, tap-11) and restart Bird using "birdc restart all", I got a coredump in Bird with the following backtrace: (gdb) bt #0 kif_choose_primary (i=i@entry=0x66ce10) at krt.c:155 #1 0x000000000040be49 in ifa_recalc_primary (i=i@entry=0x66ce10) at ../../nest/iface.c:469 #2 0x000000000040c9f5 in ifa_delete (a=<optimized out>) at ../../nest/iface.c:579 #3 0x0000000000441649 in nl_parse_addr (h=h@entry=0x68c140, scan=scan@entry=0) at netlink.c:554 #4 0x000000000044182a in nl_async_msg (h=0x68c140) at netlink.c:979 #5 nl_async_hook (sk=<optimized out>, size=<optimized out>) at netlink.c:1026 #6 0x000000000043ba65 in sk_read (s=s@entry=0x68e150) at io.c:1831 #7 0x000000000043c2b2 in io_loop () at io.c:2187 #8 0x0000000000402ca1 in main (argc=<optimized out>, argv=<optimized out>) at main.c:844 I added some debug message and noticed the problem is the device protocol is restarting, and kif_shutdown is called, then as the backtrace shows it tries to delete the interface and call kif_choose_primary() while kif_proto is NULL at the time. I comment out that part of the code and noticed kif_start is called after those kif_choose_primary() calls. I am new to Bird code, so is this a Bird bug or I am not doing things correct (i.e. when change config, I shouldn't just call birdc restart all)? Wei

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Socket error: TCP_MD5SIG: Cannot allocate memory
by Brian Rak 19 Nov '15

19 Nov '15

I have a machine running BIRD 1.4.5, and I'm seeing a lot of these messages when I start it up: 2015-08-24 15:54:26 <ERR> xxxx: Socket error: TCP_MD5SIG: Cannot allocate memory 2015-08-24 15:54:26 <ERR> yyyy: Socket error: TCP_MD5SIG: Cannot allocate memory It also seems like the sessions that report that error do not come up, and show a status of 'Error: Kernel MD5 auth failed'. I'm only trying to configure around 200 BGP sessions here, most of which are advertising a very small number of prefixes. I don't really see any tunable settings here, any suggestions as to how I can correct this?

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FreeRTR
by Ondrej Filip 17 Nov '15

17 Nov '15

Ahoj! Videli uz jste tohle - http://freerouter.nop.hu/ Ve ctvrtek ma prezentaci na RIPE v ramci Open Source WG. Musim rict, ze jsem v soku, co vsechno ten clovek naprogramoval... Docela nas v mnoha vecech prebhel, i kdyz nechci srovnavat BIRDa a toto. F.

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Is it possible to insert an MRT dump into BIRD routing tables ?
by Bahram 16 Nov '15

16 Nov '15

Hello there, I was wondering if it is possible to insert and replay an MRT dump (say BGP dump) of a router into the BIRD routing tables ? Thanks in advance. -- Best wishes, Bahram BahramBeigy http://www.bahrambeigy.ir

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RIP with MD5 authentication
by Alex Lalik 12 Nov '15

12 Nov '15

Hello, I face a problem when configuring RIP with MD5 authentication in bird. I find no examples in configuring bird this way, so maybe this could be added to the documentation. This is the bird configuration I use: protocol kernel { scan time 20; # Scan kernel routing table every 20 seconds export all; # Default is export none learn; device routes; } protocol device { scan time 10; # Scan interfaces every 10 seconds } protocol direct { interface "eth0"; } filter rip_export { # redistribute connected if ( source = RTS_DEVICE ) then { print "net accepted:", net; accept; } reject; } protocol rip RIP { debug all; honor neighbor; authentication md5; passwords { password "secret"; }; port 520; interface "eth0" { mode multicast; }; import all; export filter rip_export; } I tried to configure bird with the configuration above to connect to quagga (v0.99.23.1) and also to another instance of bird (v1.4.4 and v1.5.0). In both cases I get an error message in the logs that the authentication has failed: Nov 11 15:39:12 AVILA err bird: MD5 tail signature is not there Nov 11 15:39:12 AVILA err bird: RIP: Authentication failed In case I use plain configuration (authentication plaintext) instead of MD5 then the boxes connect successfully and routes are exchanged. Do I use a wrong RIP configuration or is this a bug in bird ? Best regards, Alexander Velkov

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MRT rib dump support
by Evelio VILA 12 Nov '15

12 Nov '15

Hello, I just came across this commit https://gitlab.labs.nic.cz/labs/bird/blob/3e3e381b98fe8809b560da7cd5dc95641… Any ideas when is the feature planned for release :) Thanks! Evelio Vila

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Question regarding interaction between custom protocols and OSPF tables
by Adam Schultz 12 Nov '15

12 Nov '15

Is it possible to advertise routes from a custom protocol via OSPF as an internal route type instead of external-1 or external-2? The use case is an application that does not use the kernel routing table and needs to inject routes into OSPF. To do this, I'm experimenting with a custom protocol that communicates with the application and imports the routes for me. Unfortunately, since the routes in the common table appear to come from my protocol instead of OSPF, they're exported as external which distinctly not the desired behavior. Thanks for any help or advice you can provide, Adam

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MRT rib dump support
by Evelio VILA 12 Nov '15

12 Nov '15

Re Hello, Looking into this commit, https://gitlab.labs.nic.cz/labs/bird/commit/11fabd2d6b8bc3d6ca86acd3b62fe4d… I hope it doesn't mean that you will be removing BGP UPDATE dumps to add the RIB dumps. Will both be supported? Thanks Evelio

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bird: KIF: Invalid broadcast address 255.255.255.255 for em1
by Job Snijders 10 Nov '15

10 Nov '15

Hi Fellow BIRD users, It appears that BIRD does not fully appreciate RFC3021 style addresses on Ubuntu 15.04, when I start BIRD: syslog:Nov 10 15:25:15 eunetworks-2 bird: KIF: Invalid broadcast address 255.255.255.255 for em1 syslog:Nov 10 15:25:15 eunetworks-2 bird: KIF: Invalid broadcast address 255.255.255.255 for p2p2.1003 syslog:Nov 10 15:25:15 eunetworks-2 bird: Started root@eunetworks-2: # ip -4 addr show dev em1 2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 inet 94.142.247.237/31 brd 255.255.255.255 scope global em1 valid_lft forever preferred_lft forever root@eunetworks-2: # ip -4 addr show dev p2p2.1003 14: p2p2.1003@p2p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default inet 78.152.32.177/31 brd 255.255.255.255 scope global p2p2.1003 valid_lft forever preferred_lft forever Should I configure the Linux side of things differently or is this something that needs resolving in BIRD itself? root@eunetworks-2:~# uname -a Linux eunetworks-2 3.19.0-32-generic #37-Ubuntu SMP Wed Oct 21 10:23:06 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux root@eunetworks-2:~# dpkg -l | grep bird ii bird 1.5.0-1+vivid+1 amd64 Internet Routing Daemon root@eunetworks-2:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 15.04 Release: 15.04 Codename: vivid Kind regards, Job

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bird scalability
by Иван Разин 10 Nov '15

10 Nov '15

Hello! We quite successfully use Bird in our infrastructure and now want to expand it. I would like to know how it will behave in the following conditions are met: 4 BGP full view 70 Bird ospf routers in the same area 10000 ospf routes Did someone experience in the deployment of such a scheme and whether there were any difficulties or problems? -- Razin Ivan

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