July 2012 - Bird-users - Mailing Lists

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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Repeated log OSPF LSA disappeared
by Internet Expert s.r.o. - Žichovský Pavel 09 Oct '12

09 Oct '12

Hi, I'm new with Bird. Currently we have deployed it on one router for OSPF. Everything works fine, until one interface on other router in OSPF network went down.

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Route aggregation in BIRD - how?
by Maciej Wierzbicki 20 Aug '12

20 Aug '12

Hello. Case study: * importing full BGP table from various uplinks * some routes received by BGP are being exported via OSPF to core1, using filters: (source = RTS_BGP && bgp_path ~ [= * ASNXYZ * =]) Question: how to aggregate routes (whenever possible) before exporting them via OSPF to core? Example: lets say that I've received a.b.c.d/22 and a.b.c.d/24 from asnXYZ via BGP. Lets say that I want to export routes with asnXYZ in aspath via ospf to core1 switch. Obviously, a.b.c.d/24 is in a.b.c.d/22, so I would like to export only a.b.c.d/22. Is it doable in bird? If yes, any hint/keywords in doc? -- * Maciej Wierzbicki * At paranoia's poison door * * VOO1-RIPE *

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BGP commands enquiry - advertised-route, received-route, and many more
by Jimmy Halim 15 Aug '12

15 Aug '12

Hi guys, I am very new to BIRD daemon. Can I check with anyone in the mailing list on the equivalent commands for the following in BIRD daemon? - Show ip bgp neighbors 1.1.1.1 advertised-routes (cisco) - Show ip bgp neighbors 1.1.1.1 received-routes (cisco) - Show ip bgp neighbors 1.1.1.1 routes (cisco) - Bgpctl show rib (OpenBGPD) - Bgpctl show fib (OpenBGPD) Thanks in advance! Cheers, Jimmy

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use of strlcpy
by Alexander V. Chernikov 14 Aug '12

14 Aug '12

Hello list! Currently we have 11:32 [0] fbsd8# egrep -RI 'strn?cpy' . 2>/dev/null | wc -l 44 items which are mostly strcpy. Maybe we can add strlcpy() to linux sysdep code and convert most of these calls? I can provide patch if needed

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Re: Route aggregation in BIRD - how?
by Ondrej Zajicek 14 Aug '12

14 Aug '12

On Thu, Feb 23, 2012 at 01:13:16AM +0000, Alexander V. Chernikov wrote: > On 24.01.2012 22:12, Alexander V. Chernikov wrote: >> Ondrej Zajicek wrote: >>> On Mon, Jan 23, 2012 at 10:30:48PM +0400, Alexander V. Chernikov wrote: >>>> On 23.01.2012 22:00, Ondrej Zajicek wrote: >>>>> On Mon, Jan 23, 2012 at 08:14:28PM +0400, Alexander V. Chernikov wrote: >>>>>> On 23.01.2012 20:01, Maciej Wierzbicki wrote: >>>>>>> Hello. > > Hello. > Long story short, beta for aggregation protocol is attached. Thanks, i will look at it. -- 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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[patch] interface name as router id
by Alexander V. Chernikov 28 Jul '12

28 Jul '12

Hello list! The following patch permits the following syntax: router id "lo1"; Primary interface IPv4 address is used. Tested on FreeBSD/debian with both IPv4/IPv6 build.

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Need some help about static routing tables on two hosts.
by Eliezer Croitoru 26 Jul '12

26 Jul '12

i' kind of new in some of this stuff so i need basically directions. i am working on a lab for a real implementation. the way things works now is like that: 10 proxies behind 2 LB that works based o linux route policies. the policies are "from ip/mask use routing table 10" will take all traffic from these sources through proxy 10 route that is store in linux routing table 10 that contains "default via proxy_ip". there is a "master" server that gets live extended status of each proxy. it can be up\down load = 80% etc... and if a change of a route on the LB should be changed it is being committed using a script over ssh almost manually. what i want to do is to use bird to control the routing tables on the LB and on the "master" server have an instance of bird the will feed the routes to the LB bird. so the LB will be completely untouchable in the OS commands level. i have tried to understand if there is a way to make it all work but i dont seem to understand what i can and what i cannot do using bird. the clients are at: 10.110.0.0/16 the LB has the address 10.110.0.1 + 10.100.1.1 + 10.127.1.1/24 the proxy servers are at 10.100.1.0/24 the master sits in the proxy lan at: 10.100.1.254 the gw of the proxy servers is the LB 10.100.1.1 the default gw of the LB is 10.127.1.254 so i want the master to monitor the proxy servers and in a case of change in the network status of a proxy for any reason to let say down i would change the routes in specific table and then send bird "configure soft" to update the settings. so if there is a nice method of combining all bird capabilities and some routing protocol for the process i will be very happy to hear about it. i have tried to use bgp in a local as between the master and the LB but it seems that on the LB when he gets the static route it states the route: 0.0.0.0 .... unreachable. i will later will put here the settings i used. Thanks, Eliezer -- Eliezer Croitoru https://www1.ngtech.co.il IT consulting for Nonprofit organizations eliezer <at> ngtech.co.il

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default route problem
by e2rd＠piekielko.pl 26 Jul '12

26 Jul '12

Hi, I've got very simple config: -- bird.conf -- log "/var/log/bird.log" { debug, trace, info, remote, warning, error, auth, fatal, bug }; debug protocols all; router id 172.0.0.1; protocol kernel { learn; persist; scan time 20; export all; } protocol device { scan time 10; } protocol static { route 0.0.0.0/0 drop; } protocol ospf MyOSPF { export all; area 0.0.0.0 { interface "dummy*" { }; }; area 10.0.0.0 { nssa; interface "eth*" { type nbma; }; }; } -- end -- If area 10.0.0.0 is commented it works as expected: bird> s o l Global Type LS ID Router Age Sequence Checksum 0005 192.168.54.255 172.0.0.1 3 80000001 c588 0005 192.168.55.0 172.0.0.1 3 80000001 ba92 0005 0.0.0.0 172.0.0.1 3 80000001 cb22 0005 10.155.74.255 172.0.0.1 3 80000001 cc31 Area 0.0.0.0 Type LS ID Router Age Sequence Checksum 0001 172.0.0.1 172.0.0.1 2 80000001 ac9b bird> but if I uncomment it (area 10) default route is disapearing: bird> sh ro 0.0.0.0/0 blackhole [static1 01:34] ! (200) via 10.5.2.1 on eth0 [kernel1 23:50] (10) 10.5.2.0/24 dev eth0 [MyOSPF 23:51] * I (150/10) [172.0.0.1] 10.155.74.0/24 via 10.155.74.5 on tun0 [kernel1 23:50] * (10) 192.168.54.0/24 via 10.155.74.5 on tun0 [kernel1 23:50] * (10) 192.168.55.0/24 via 10.155.74.5 on tun0 [kernel1 23:50] * (10) 172.0.0.1/32 dev dummy0 [MyOSPF 23:51] * I (150/0) [172.0.0.1] bird> s o l Global Type LS ID Router Age Sequence Checksum 0005 192.168.54.255 172.0.0.1 2 80000001 c588 0005 192.168.55.0 172.0.0.1 2 80000001 ba92 0005 10.155.74.255 172.0.0.1 2 80000001 cc31 Area 0.0.0.0 Type LS ID Router Age Sequence Checksum 0001 172.0.0.1 172.0.0.1 1 80000001 af97 0003 10.5.2.255 172.0.0.1 1 80000001 e2b1 Area 10.0.0.0 Type LS ID Router Age Sequence Checksum 0001 172.0.0.1 172.0.0.1 1 80000001 22b7 0003 172.0.0.1 172.0.0.1 1 80000001 847d bird> If the area 10.0.0.0 is stub or nssa default route is propagated in ospf. After changing area 10 to normal area and reconfiguring bird log says: <TRACE> MyOSPF: Going to remove LSA Type: 0005, Id: 0.0.0.0, Rt: 172.0.0.1, Age: 3600, Seqno: 0x7fffffff <TRACE> MyOSPF: Flushing AS-external-LSA for 0.0.0.0/0 <TRACE> MyOSPF: Flushing summary-LSA (id=0.0.0.0, type=3) <TRACE> MyOSPF: Going to remove LSA Type: 0003, Id: 0.0.0.0, Rt: 172.0.0.1, Age: 3600, Seqno: 0x7fffffff <TRACE> MyOSPF: Flushing AS-external-LSA for 0.0.0.0/0 Why 0.0.0.0/0 is removed from ospf while other kernel routes not? How redistribute it in multiple areas? other info: localhost:/tmp# ip ro sh 10.155.74.5 dev tun0 proto kernel scope link src 10.155.74.6 10.155.74.0/24 via 10.155.74.5 dev tun0 192.168.54.0/24 via 10.155.74.5 dev tun0 192.168.55.0/24 via 10.155.74.5 dev tun0 10.5.2.0/24 dev eth0 proto kernel scope link src 10.5.2.2 default via 10.5.2.1 dev eth0 lo: 127.0.0.1/8 eth0: 10.5.2.2/24 tun0: 10.155.74.6 peer 10.155.74.5/32 dummy0: 172.0.0.1/32 regards, -- Łukasz

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RIP not working - interface is much too slow
by Jarek 26 Jul '12

26 Jul '12

Hello! I've installed bird on new, quite fast machine with GE interfaces but connected to router with 2Mbps output to WAN. The configuration is quite simple and tested on another machine (4 years old). Except defaults, I have: protocol rip myrip { export all; import all; period 10; authentication none; interface "*" { mode broadcast; }; } I have one private network 192.168... connected to this machine, and I want to distribute info about this network to other routers. Unfortunetely it is not working. I don't see any messages about distributing this network, but I see the following messages every 10 secosnds: Interface eth1 is much too slow, droping request. Routes from outside are accepted and I see them in my routing table. I can also see routes to my other private net, broadcasted by old router with almost the same bird configuration. What is wrong ? Why the interface is too slow ? best regards Jarek

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