November 2015 - 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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Re: RIP with MD5 authentication
by Alexander Velkov 29 Jun '16

29 Jun '16

ok great, thank you for your answer! On Thu, Nov 12, 2015 at 7:01 PM, Ondrej Zajicek <santiago(a)crfreenet.org> wrote: > On Thu, Nov 12, 2015 at 05:25:18PM +0100, Alexander Velkov wrote: > > Hi Ondrej, > > > > thank you for your reply! > > > > When is this branch planned to be integrated to main? > > I guess we will release a new version of BIRD containing RIP from rip-new > branch during 2015-12 or 2016-01. > > -- > Elen sila lumenn' omentielvo > > Ondrej 'Santiago' Zajicek (email: santiago(a)crfreenet.org) > OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) > "To err is human -- to blame it on a computer is even more so." >

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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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segfault with BFD
by Michal Humpula 11 Dec '15

11 Dec '15

Hi, I came across this lovely segfault when using BFD in Bird v1.4.5 and v1.5: (gdb) bt #0 bfd_send_ctl (p=0x5555557cf840, s=0x5555557e2cf8, final=0) at ../../../proto/bfd/packets.c:66 #1 0x000055555556fc86 in timers_fire (loop=loop@entry=0x5555557dfba0) at ../../../proto/bfd/io.c:437 #2 0x000055555556fe24 in birdloop_main (arg=0x5555557dfba0) at ../../../proto/bfd/io.c:759 #3 0x00007ffff7bc4182 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #4 0x00007ffff78f147d in clone () from /lib/x86_64-linux-gnu/libc.so.6 Any idea if this is fixed in latest master or that it might be result of misconfiguration? Cheers Michal

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KRT: Received route with strange next-hop
by Brian Rak 05 Dec '15

05 Dec '15

I'm trying to figure out why BIRD is throwing this error every time it scans the kernel routing table: <ERR> KRT: Received route 216.155.132.254/32 with strange next-hop 45.63.4.188 <WARN> Netlink: File exists I have two routes relevant to this one: # ip route | grep 45.63.4.188 45.63.4.188 dev veth0 scope link 216.155.132.254 via 45.63.4.188 dev veth0 proto bird The 45.63.4.188 route was added by me (manually), the 216.155.132.254 was added via BIRD (BIRD learned it via BGP). So, to me this looks like bird adding the route to the kernel, then getting confused why the route exists. Aside from this warning, everything appears to be working fine. Linux routes the traffic properly, BIRD readvertises this route properly. Any thoughts here? I think I can probably suppress this warning by removing the 'ng->scope == SCOPE_HOST' check from netlink.c, but I'm not entirely sure why that's there to begin with.

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RR reflects customer routes, the route is not delivered to the forwarding table.
by 曾小小 01 Dec '15

01 Dec '15

Hi All, I have 3 routers connected like this. R1 （RR） / \ / \ （AS100） / \ R2 R3 (client_1） (client_2） I am using Ubuntu 14.04, bird version is 1.5.0 Between the R1, R2, R3 OSPF establish IGP full mesh. R1 is configured as RR, R1 and R2, R1 and R3 establish IBGP connections . R2 redistribute static routes via BGP, to AS100, R3 can receive routing information from R2, and R1 (RR) can also receive R2 advertised routing information, and delivered to the forwarding. If this routes by the R1 will be sent to the forwarding, it will directly affect the business. How to use the BIRD in BGP configuration commands let R1 is not delivered to the forwarding? another question: Also on the use of “next hop self”, and what is the use in BGP as well? I know that within an AS, if learned from EBGP routing information, you can modify the next hop address of the border router interface. ===== about r3 routeing information link this: 6.6.6.6/32 via 192.168.1.68 on vlan2 [bgp_r1 07:27:16 from 192.168.10.126] * (100/?) [i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: BGP.next_hop: 192.168.1.68 BGP.local_pref: 100 BGP.originator_id: 192.168.1.68 BGP.cluster_list: 1.1.1.1 all configuration information is as follows R1： ==== ##template about rr template bgp rr_client { debug { states,interfaces,events }; description "ibgp-rr1"; local 192.168.10.126 as 64600; multihop; rr client; rr cluster id 1.1.1.1; } filter bgp_out_r1 { if net ~ [ 6.6.6.6/32, 7.7.7.7/32 ] then accept; reject; } protocol bgp rr_r2 from rr_client { neighbor 192.168.1.68 as 64600; export filter bgp_out_r1; import all; #next hop self; } protocol bgp rr_r3 from rr_client { neighbor 192.168.2.69 as 64600; export filter bgp_out_r1; import all; #next hop self; } ==== R2： filter bgp_out_r2 { if net ~ [ 6.6.6.6/32, 7.7.7.7/32 ] then accept; reject; } protocol bgp bgp_r2 { debug { states,interfaces,events }; description "ibgp-rr1"; import all; export filter bgp_out_r2; local as 64600; neighbor 192.168.10.126 as 64600; source address 192.168.1.68; next hop self; } === R3: protocol bgp bgp_r3 { debug { states,interfaces,events }; description "ibgp-rr1"; import all; export all; local as 64600; neighbor 192.168.10.126 as 64600; source address 192.168.2.69; next hop self; }

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pattern matching for bgp communities
by Job Snijders 25 Nov '15

25 Nov '15

Hi all, Is there a way to do pattern matching or regex matching on the BGP communities associated with a prefix? The use-case I have: an eBGP peer attaches communties which inform me both about the geographical point of origin and the type of relation my eBGP peer has with the remote network adjacent to them. In their scheme they treat the lower 16 bits of the BGP community as a string of sorts, where the first digit represents continent and the second digit the type of relation: so "65535:12" might mean (after removnig the '65535' part, "12" remains), the "1" signifies the continent (say europe), the "2" signifies the relation (say 'peering'). Should I want to accept all routes where the relation is equals say "3", I'd have to either create a list of all possible communities matching where relation is "3", you'd end up with something like this: function filter_rel_type() clist l; { l = [(65535, 3), (65535, 13), (65535, 23), (65535, 33), (65535, 43), (65535, 53), (65535, 63), (65535, 73), (65535, 83), (65535, 93)]; if l ~ bgp_community then return true; return false; } You can imagine that with more complex informational scheme's 'clist l' would grow to rather large proportions. Is there a more elegant way to accomplish this style of matching? Kind regards, Job

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Advertise prefix without static
by David S. 22 Nov '15

22 Nov '15

Hi All, My name is David, I'm from Indonesia. I'm new on BGP and especially Bird. I configure FreeBSD 10.2 with Bird 1.5. I just want to know there is any way to advertise a network prefix without protocol static, please tell how if is it possible. I have read the documentation and I can't find any article that point me to my question. Thanks in advance. Best regards, David S. ------------------------------------------------ e. david(a)zeromail.us w. http://blog.pnyet.web.id

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distribute /32 route via ospf?
by d tbsky 21 Nov '15

21 Nov '15

hi: I need to add some hosts to ospf topology. if i setup eth0 as 192.168.1.254/32 and add eth0 to ospf interface, it won't be distributed. however 192.168.1.254/31 works fine. I don't know if there are options I can use so bird would like to distribute /32 route? thanks for help!! Regards, tbskyd

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