June 2015 - Bird-users - Mailing Lists

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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OSPF state inconsistency
by Przemyslaw Frasunek 21 Feb '16

21 Feb '16

Dear all, we are using BIRD 1.4.5 with OSPF on PPPoE access servers running FreeBSD 9.3 and mpd 5.7. In order to achieve fail-over, each access server is listening on the same VLANs. The user connects to access server which first responds with PPPoE PADO. Some of our subscribers need additional IPv4 prefix, which is routed via address assigned from pool. Such route is added by mpd on connect and deleted on disconnect or LCP timeout. Unfortunately, we are experiencing OSPF state inconsistency between access servers, when user quickly disconnects from one node and connects to another. This is such example, which caused routing loop: (on 193.138.118.89) # birdc show route for 46.21.220.80/28 BIRD 1.4.5 ready. 46.21.220.80/28 via 193.138.118.90 on vlan0 [ospf1 13:08:12] * E2 (10/10/10000) [193.138.118.90] (on 193.138.118.90) # birdc show route for 46.21.220.80/28 BIRD 1.4.5 ready. 46.21.220.80/28 via 193.138.118.89 on vlan0 [ospf1 13:12:32] * E2 (10/10/10000) [193.138.118.89] Any ideas, how to fix it? This is our bird.conf: log syslog { remote, error, auth, fatal, bug }; router id 193.138.118.90; protocol kernel { learn; scan time 20; export filter { if proto = "static_bgp" then reject; accept; }; } protocol device { scan time 10; } protocol ospf { preference 10; import filter { accept; }; export filter { if net.ip = 0.0.0.0 then reject; if source = RTS_STATIC then accept; if proto = "kernel1" then accept; if proto = "direct1" then accept; reject; }; area 0 { interface "vlan0" { }; interface "vlan*" { stub; }; interface "carp*" { stub; cost 1000; }; }; } protocol direct { import filter { accept; }; };

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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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Enhanced Route Refresh Capability (rfc7313)
by Arnaud Fenioux 27 Jul '15

27 Jul '15

Hello, We updated one of our Route-server and noticed that a few number of our peers could not establish IPv6 sessions with us. The reason in the logs was "Received: Required capability missing”. After some tcpdump and investigation we found that Enhanced Route Refresh Capability was newly advertised (as explained in the bird release notes). Sadly Juniper boxes do think that this capability is mandatory (only) in IPv6. We have disabled route refresh (enhanced and regular), as a work-around, for these peers. enable route refresh off; Would it be possible to only disable enhanced route refresh in the configuration file for a next release of bird? Cheers, -- Arnaud Fenioux Network Engineer - FranceIX

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bgp export not active route
by steck.bsd 03 Jul '15

03 Jul '15

Hello is it possible export in bgp a route non active ? I receive the same network from more neighbor and only one is active. I would like export to another neighbor those not active for my bird router. thanks Steck

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Patch: Let "make" output be nicer
by Christian Tacke 03 Jul '15

03 Jul '15

Hi, while trying around some things, I couldn't resist to improve the output of make a little to look more like the linux kernel. The patch is mergeable from here: https://github.com/ChristianTacke/bird/tree/nicer_make Hope someone likes it. Cheers Christian -- www.cosmokey.com

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BIRD removing BGP routes from other daemon - FreeBSD
by Cassiano Peixoto 03 Jul '15

03 Jul '15

Hello, I have a particular scenario where my BGP runs with OpenBGP and I can not change it right now. However I want BIRD to use OSPF and BFD. While BIRD works perfectly, better than OpenOSPF for my scenario, when I start it, it completely removes all routes installed by OpenBGP. My kernel context has learn, persist and import: protocol kernel { learn; persist; scan time 10; import all; #export all; graceful restart on; } What should I do to keep BIRD co-operating with other routing daemons? Thank you.

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Bird 1.4.5 add-path crash
by Martin Pels 02 Jul '15

02 Jul '15

Hello, I'm seeing Bird 1.4.5 crash with a segmentation fault when receiving routes from a peer with add-path enabled. BIRD config: protocol bgp { direct; description "Juniper"; local as 65065; neighbor a:b:c:a as 65065; add paths rx; gateway direct; import none; export none; } The other side is a Juniper BGP speaker (JunOS 12.3R7), with the following config: neighbor a:b:c:d { family inet6 { unicast { add-path { send { path-count 2; } } } } peer-as 65065; } Session establishment completes, but when the Juniper sends routes Bird crashes. I can provide a core dump and pcap trace if needed. Kind regards, Martin Pels CDN Network Engineer LeaseWeb Technologies B.V. T: +31 20 316 0232 M: E: m.pels(a)tech.leaseweb.com W: http://www.leaseweb.com Luttenbergweg 8, 1101 EC Amsterdam, Netherlands

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bird becoming unresponsive after a few hours
by Darren O'Connor 29 Jun '15

29 Jun '15

Hi. I run bird 1.3.7 on a Debian VPS which peers with three IPv4 peers and three IPv6 peers. I have no data plane traffic, as I use these peers to run these two twitter accounts: https://twitter.com/bgp4_table https://twitter.com/bgp6_table I needed more peers, so I moved to a new VPS with 2GB ram. The previous only had 1GB. I have have 7 global IPv4 peers and 7 IPv6 peers. I'm running bird 1.4.0 on Ubuntu 14.04 - I've noticed that if I leave it for about an hour, and then log into birdc and type 'show route count' - bird will stall for about a minute giving no response. At that time, if I check netstat my Recv-Q rapidly increases on all my BGP sessions. Now and then my BGP peers will also go down stating hold time expired. When I check at random times my Recv-Q is high on these sessions. My older server with three peers has never had this issue. Unfortunately bird's log is not showing anything. It only shows when a peer goes down due to the hold time expired. Any ideas on what I can check? Thanks Darren

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Bird 1.5.0: protocol 'direct' looses routes
by Andrew 18 Jun '15

18 Jun '15

Hi all. I'm testing bird 1.5.0 on PPPoE BRAS, and today noticed that sometimes it looses routes. For ex., today it looses near 5 networks of 103 total (before restart - it has 98 routes, after - 103) Possibly this may be related with tunnel session hangup - when user reconnects with same IP and then old session is dropped, bird may loose this route while route is present in system. But I'm not sure about this.

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