- Bird-users - Mailing Lists

IBGP- disappearing routes
by David J Craigon 18 Apr '11

18 Apr '11

Hello, I have two routers running Bird. I am exporting the internet's routing table from one into the other via IBGP. If I use wireshark, I can see many routes going across the network. If I run Bird in debugging mode. I get lots of "ibgp: Got UPDATE" log messages. But no routes appear in my routing tables, and the counters when I do "show protocols all ibgp" never change. I have the filters set to "export all; import all;" Any clues? David

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Routing for VPN network
by Ask Bjørn Hansen 06 Apr '11

06 Apr '11

Hi everyone, I'm using 'bird' to announce some prefixes for the anycast DNS servers for the NTP Pool system. It's working great and I really enjoy how straightforward the configuration is. We're planning to make the DNS servers (about ~18 currently) all connect to two out of three "master nodes"; probably one in Europe and one in western and one in eastern United States. For another similar VPN network I use BGP with private ASN's for the routing; but for this project each site is generally just one or two actual servers, so allocating a private ASN and all that seems extra tedious. Would it make sense to use OSPF for this instead? My only experience with OSPF is setting it up between routers in one site so they know how to get to the 'next hop' of routes coming in and shared via BGP/IBGP. I've also been considering just running IPv6 on the VPN instead; but I have even less experience with OSPFv3. :-) Any advice? - ask -- Ask Bjørn Hansen, http://askask.com/

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ospf uses private ip as a gateway
by Martin Kraus 04 Apr '11

04 Apr '11

Hi. I'm using bird 1.2.5 from debian squeeze respository. I've got two routers with public a private ip addresses on the connecting interfaces. The public addresses are selected as primary in device protocol but ospf chooses private address as the address to route prefixes over. When I block ospf packets from the private addresses it switches fine but when I allow ospf to them it switches all the routes to the private gateways again. Is there any way to force bird to use public addresses other then setting them as primary in device protocol specification? I want to keep interface names in interfaces definitions instead of ip addresses. thanks for your help mk

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Modify Bird to recognize packet fields
by Marco Basaldella 04 Apr '11

04 Apr '11

Hi everyone, I have to modify a router to recognize some special packet fields, in order to implement a particular protocol we are testing. I thought I could modify BIRD, since we're using it in our Faculty ( I am research fellow at the Engineering Department of my University), but fist of all I'd like to know if is it possible. I've read the wiki and the Coder's doc, but I haven't found an answer for my question. Does BIRD have a built-in engine that scans packet fields in ipv4 or ipv6 headers, or does it rely completely on the underlying architecture to get packet informations from the interfaces? (i.e. like other software routers do, like XORP) Is it possible to do such modifications to BIRD? Thanks, -Marco

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New release 1.3.0!
by Ondrej Filip 04 Apr '11

04 Apr '11

Hi! New version is ready. This version includes many changes and bugfixes. We are working on packaging and other stuff. Changes: Version 1.3.0 (2011-03-31) o Proper iBGP (can be used with IGP). o Multipath support (OSPF and static). o L2 link state detection. o IPv6 router advertisements. o Much improved OSPF reconfiguration. o Point-to-MultiPoint interfaces (OSPF). o Minor changes and improvements in config file grammar. o Better community list matching o Changes default behavior of BGP IPv6 socket to v6only. Use 'listen bgp dual' for the old behavior. o Changes default for handling missing link-local addresses on route servers. Use 'missing lladdr drop' for the old behavior. o Important bugfix for OSPF. o Several minor bugfixes. Ondrej

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Patch to fix BGP ghost routes resulting from loops
by Ivo Smits 04 Apr '11

04 Apr '11

I've created attached patches to prevent BGP route loops from turning into ghosts (issue reported earlier to the mailing list: http://marc.info/?l=bird-users&m=129433651229774&w=2) Instead of completely ignoring received BGP routes containing the router's own AS number, it should now handle them as if the prefixes are unreachable. We have tested the patch against git and it fixed the issue there. I've also made an (untested) patch against bird 1.2.5. -- Ivo

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source address for routes installed in routing table (on linux)
by Arkadiusz Miskiewicz 03 Apr '11

03 Apr '11

Hello, bird installs routes in kernel table without any source address, so for all connections initiated at that machine kernel chooses address from interface. I'm looking for a sane way to get routes installed with specific source address - basically an equivalent of "ip r a x.y.z.q/prefix via nexthop dev ethX src MYIP" command. I don't see such functionality in bird (so consider this to be a feature request). From irc I see that there are hacky way to get archieve that but these are just hacky (adding ipv4 address with scope link or preferred_lft 0 for ipv6). -- Arkadiusz Miśkiewicz PLD/Linux Team arekm / maven.pl http://ftp.pld-linux.org/

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BGP filtering examples
by Ondrej Zajicek 01 Apr '11

01 Apr '11

Hello I wrote some text about suggested BGP filtering to BIRD wiki: https://git.nic.cz/redmine/projects/bird/wiki/BGP_filtering Any comments or suggestions? -- 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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Re: BIRD: route selection question
by Mikhail A. Grishin 31 Mar '11

31 Mar '11

Alexander Ilin wrote, 30.03.2011 18:15: > On Mon, Mar 28, 2011 at 06:43:41PM +0200, Ondrej Zajicek wrote: >> On Mon, Mar 28, 2011 at 03:25:51PM +0400, Mikhail A. Grishin wrote: >>> Hi, Ondrej >>> >>> Thank you for explanation. >>> >>> One more question: is it possible to add "bgp always-compare-med" option >>> in BIRD? >> That would not be a problem. A question is under which circumstances such >> comparison has some sense. Probably only if user overwrites all MEDs >> on input to the AS. > > Hi Ondrej, > > We are using it at Cisco Route Servers and some of customers using it. > I think it could be a good idea to have this option available, as some > of our members want to have this feature enabled at our IXP. And one more thing: in some of the previous answers you told about "time of route". In route selection process inside the BIRD, at what step this criteria counted? Before 'router_id' or after? > > Best regards, > > --- > Alexander Y. Ilin > CTO MSK-IX > Phone:+7(495)737-0685, +7(499)192-9179

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Re: IRC
by Jiří Kubíček 28 Mar '11

28 Mar '11

Hello, there is ircnet which is most used in .cz, but there were some problems with this irc network so we moved for example #rubyonrails.cz to freenode a while ago and we do not experience any problems. All of the free software channels I have recently used (ie. #puppet, #couchdb, #rabbitmq, #elasticsearch) are on freenode as well. Already four of us are on #bird at freenode. Join us :) Jiri Kubicek On 24.3.2011, at 21:42, Chris Malayter wrote: > From a network perspective, I'd much rather use a smaller network, than a large network like freenode. Keeps the troll level down. > > -Chris > > On Mar 24, 2011, at 4:18 PM, Jiří Kubíček wrote: > >> Hello, >> >>>>> ps. is there bird related irc channel or do devs use irc? >>>>> (arekm@freenode) >>>> I am also interested in this (consi@freenode). :) >>> +1 (_ruben@freenode) >> >> >> I have joined #bird channel on freenode. Meantime two other bird users have joined this channel as well. >> >> #bird channel was registered by another user, but has not been used by this user about a year. >> >> I have asked on #freenode channel, if there is any way to gain registration of this channel and i was pointed to group registration page (http://freenode.net/group_registration.shtml) This registration has to be filled by bird team representative. >> >> Another option is to use channel ##bird as unofficial bird channel, but I hope bird team will fill the registration. >> >> S pozdravem >> >> Jiri KUBICEK >> >> -- >> KRAXNET s.r.o. - www.kraxnet.cz >> Kamenicka 26, 170 00 Praha 7 >> --- >> >> > S pozdravem Jiri KUBICEK -- KRAXNET s.r.o. - www.kraxnet.cz Kamenicka 26, 170 00 Praha 7 ---

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