February 2016 - 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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[PATCH master v2] IPv6 ECMP support fixes for linux
by Mikhail Sennikovskii 04 Apr '16

04 Apr '16

Hi Ondrej and all, Here is the second version of the Linux IPv6 ECMP support patch. It encorporates the adjustments, requested by Ondrej, as well as some other modifications/fixes, accompanied by the comments in the code. To save a bit of my time, I've created just one patch against the master for now. Once we agree on the patch, I will create a patch agains int-new right away, since adapting it to int-new is really strait-forward. Also, as we discussed before, I will also create a separate patch to make the nl_parse_multipath use netlink_lp (linpool) instead of xrealloc, once we agree on the current netlink_lp approach that I've introduced. Regards, Mikhail

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[PATCH v2 0/2] Add the Babel routing protocol to Bird
by Toke Høiland-Jørgensen 14 Mar '16

14 Mar '16

This is the updated patch to add the Babel protocol to Bird. It is updated quite a bit compared to the previous version. Specifically: - Split up wire serialisation/deserialisation into a separate part from the semantic handling of TLVs. There's now a separate internal representation of the TLVs in host byte order. These are queued for handling and transmission and only serialised/deserialised at read/write from the wire. The get/put functions from unaligned.h are used to ensure alignment. - Reworked handling of route propagation to the core. Babel now keeps separate selected_in and selected_out entries for each prefix and lets the core pick which route to propagate out. - IPv4 routes are explicitly ignored in the handler instead of the parser. - Entries are timestamped and triggered updates only propagate changed entries. - TX failures are handled and transmission of the TLV queue is resumed when the socket is ready to transmit again. - Added reconfiguration support and cli show* support (based on the rip-new RIP implementation). - Added documentation of more functions and user-facing documentation. - The code has been rearranged to have packet handling code in packet.c and the semantic handlers in babel.c. Also, a bunch of code style changes and other adjustments based on the detailed comments from the last submission. I split this up in two commits, where the first one adds formatting of 64-bit router IDs to bvnsprintf() (which is technically a stand-alone change) and the other adds the Babel protocol. Toke Høiland-Jørgensen (2): Teach bvsnprintf() to print 64-bit router IDs. Add the Babel protocol. configure.in | 3 + doc/bird.sgml | 91 +++ lib/bitops.h | 3 +- lib/ip.h | 5 + lib/printf.c | 31 +- nest/proto.c | 3 + nest/protocol.h | 2 +- nest/route.h | 11 +- proto/Doc | 1 + proto/babel/Doc | 2 + proto/babel/Makefile | 5 + proto/babel/babel.c | 1905 ++++++++++++++++++++++++++++++++++++++++++++++++++ proto/babel/babel.h | 348 +++++++++ proto/babel/config.Y | 127 ++++ proto/babel/packet.c | 863 +++++++++++++++++++++++ proto/babel/packet.h | 127 ++++ sysdep/autoconf.h.in | 1 + 17 files changed, 3518 insertions(+), 10 deletions(-) create mode 100644 proto/babel/Doc create mode 100644 proto/babel/Makefile create mode 100644 proto/babel/babel.c create mode 100644 proto/babel/babel.h create mode 100644 proto/babel/config.Y create mode 100644 proto/babel/packet.c create mode 100644 proto/babel/packet.h -- 2.6.4

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Bird socket communication
by Rohrmann Sascha 14 Mar '16

14 Mar '16

Hey Ondrej, could you add some examples how to access to the /var/run/bird.ctl socket via perl at the wiki? Thanks in advance.

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BIRD crashes with 1000 peers
by Daniel Seidenstücker 11 Mar '16

11 Mar '16

Dear BIRD community, I want to connect BIRD 1.5.0 with more than 1000 ExaBGP peers on Ubuntu 14.04 LTS 64 Bit. Connecting 1000 peers works but if I increase the peer count to more than 1024 it fails due to the soft file limit of 1024. To raise that I tried the usual (ulimit, /etc/security/limits.conf) but BIRD doesnt take these new limits. Later I found the advice to add ulimit -n 10000 to the init.d script before each start-stop-daemon command. After restarting BIRD it gets the correct soft and hard limits (cat /proc/<pid>/limits | grep files). But now only 750 peers work and connecting 1000 peers crashs bird without any error message in syslog (log syslog all configured). (I did not test 751-999 peers.) It would be nice if somebody could help meJ. Thanks, Daniel Seidenstuecker

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Re: OSPF anycast prefix being filtered
by Patrik Lundin 29 Feb '16

29 Feb '16

On Apr 11, 2015 7:30 AM, "Patrik Lundin" <patrik.lundin.swe(a)gmail.com> wrote: > > On Fri, Apr 10, 2015 at 11:29:24AM +0200, Ondrej Zajicek wrote: > > On Fri, Apr 10, 2015 at 10:23:23AM +0200, Patrik Lundin wrote: > > > > > > * While bird defaults to a "ptp" link type for eth0, bird6 defaults to > > > "broadcast". > > > > > > * The dummy0 interface defaults to being a stub interface in bird, > > > while it requires > > > configuration in bird6. > > > > That is because OSPFv2 uses IPv4 addresses where /31 signalize ptp link > > and /32 stub link, OSPFv3 uses IPv6 link-local addresses and there is > > /64 everywhere. > > > > Good to know, I was mostly pointing it out if anyone was wondering why > my configuration differed somewhat between the protocols. > Sorry for bringing up this old thread but I noticed my interface was defaulting to a "ptp" link type when being configured with a /30 prefix which is not mentioned as a special case above. I realize a /30 is a "normal" two-host network with /31 being somewhat of a special case, but I want to make sure this is still expected behaviour for BIRD. -- Patrik Lundin

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Static routes
by Support of the day 23 Feb '16

23 Feb '16

Hi, this is my first post to this list, so i hope to meet the rules here. We have two BIRDs acting as BGP-router, running since more than four years without any trouble. Now we wanted to define some static routes with route yyy.yyy.yyy.yyy/32 via xxx.xxx.xxx.xxx; We reload bird and the routes can be seen with netstat -r. First question (just for learning) is: when we want to delete one of this static routes with a "#" at the beginning of the lines and reload bird, we still see this route. So what is the right way to delete a static route? Second question: the described issue was some weeks ago. This week we had to define some static routes, similar to the ones above. But this time it is not working, we cannot see the routes. And: /etc/init.d/bird restart * Restarting Internet routing daemon bird bird: sk_open_unix: bind: Address already in use bird: Unable to create control socket /var/run/bird.ctl [fail] This message is on both routers. Perhaps this is the result of a syntax-problem in our both confs? Dirk

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BFD timeouts when trunk had load
by Steve Atkinson 22 Feb '16

22 Feb '16

Hi, We are seeing problems with BFD timeouts when we begin to load gigabit uplinks from our bird router (acting as a CE) when start to load the gigabit pipes to the PE routers. We are using the BFD controlled static routes, which was built into the trunk, and we ported to our card around Oct 2015. Has anyone else had problems ? Regards Steve PS the PEs are a Cisco and Juniper ======================= Steve Atkinson CEng BEng(hon) MIET Teligent Ltd 2 Kings Hill Avenue West Malling Kent ME19 4AQ Telephone: +44(0) 1732 879 655 Fax: +44 (0) 1732 879601 [YourHomePhoneIsAnywhere] The information in this email is confidential. The contents may not be disclosed or used by anyone other than the addressee. If you are not the intended recipient, please notify the sender immediately at the above address. The sender cannot accept any responsibility for the accuracy or completeness of this message as it has been transmitted over a public network. [BSI] Teligent Ltd is registered in England and Wales, registration number 2893478. Registered office Lion House, Red Lion Street, London WC1R 4GB. VAT registration GB639938577.

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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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