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iBGP - Simple static route exchange
by Борис Коваленко 05 Mar '17

05 Mar '17

Hello! Would You please show the output for 'show route all for 192.168.1.0/24' and also 'show route all where proto = "static1"' *Regards,* *Boris* -- С уважением, Борис Коваленко

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OSPF ptmp
by Борис Коваленко 05 Mar '17

05 Mar '17

Hello, Ondrej! There was something wrong with my previous test. So I did new one. Answering your questions: 1) Where interface is broadcast and mode is ptmp - bird does not send any packet (checked with tcpdump) but with "debug all" there are messages "<TRACE> main_ospf: HELLO packet sent via em0" every tick. 2) Yes, if neighbors are configured ptmp works as expected. Without neighbors configured it even does not learn neighbors from incoming packets. 3) I read FreeBSD related post, but 1.6.3 is official port for FreeBSD and it includes patch: +#if (defined __OpenBSD__) || (defined __DragonFly__) || (defined __FreeBSD__ && (__FreeBSD_version >= 1100030)) + /* Different BSDs have different expectations of ip_len endianity */ ip->ip_len = htons(ip->ip_len); #endif 4) There really are no problems with mode == broadcast >* Hello! *> >* Trying to run bird on ethernet interface with type = ptmp. Yes, I know that *>* ethernet is broadcast interface, but there is a good practice to use ptmp *>* on ethernet. I found a strange bug. When type = ptmp, bird sends only one *>* Hello packet and then stops (and even receive?) next packets until I fully *>* restart bird, while other side (cisco or mikrotik) sends packets every 10s *>* (as configured). * Hello To which address it sends the Hello packet? To the first learned neighbor? What you see in logs if you enable 'debug all' for OSPF? What is shown by 'show ospf neighbors'? Note that BIRD expect that you specify neighbors in 'neighbors' section for NBMA or PTMP modes, but it would learn neighbors from received Hello packets. >* There is no problems with type = broadcast * >* FreeBSD - 11-STABLE *>* Bird 1.6.3 * There were people reporting problems in FreeBSD 11 due to API change, but that would affect also broadcast mode: https://www.mail-archive.com/bird-users@network.cz/msg01542.html -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org <http://trubka.network.cz/mailman/listinfo/bird-users>) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so." -- С уважением, Борис Коваленко

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iBGP - Simple static route exchange
by Cedric Lemarchand 05 Mar '17

05 Mar '17

Hello, I am trying to distribute 2 static routes between 2 hosts, not directly connected, and I am having hard time to make it works … host1 10.10.1.1 (eth0) own subnet 192.168.1.0/24 ( 192.168.1.1 on eth1) host2 10.10.2.1 (eth0) own subnet 192.168.2.0/24 ( 192.168.2.1 on eth1) I get the following error : host1 bird: bgp1 < rejected by protocol 192.168.2.0/24 unreachable host1 bird: bgp1 > updated [best] 192.168.2.0/24 unreachable Bellow the bird.conf of both hosts : log syslog all; router id 10.10.1.1; debug protocols all; protocol direct { interface "*"; # Restrict network interfaces it works with } protocol kernel { learn; # Learn all alien routes from the kernel #persist; # Don't remove routes on bird shutdown scan time 20; # Scan kernel routing table every 20 seconds import all; # Default is import all export all; # Default is export none } protocol device { scan time 10; # Scan interfaces every 10 seconds } protocol static { debug all; route 192.168.1.0/24 via 10.10.2.254; export all; } protocol bgp { multihop; #gateway recursive; import all; export all; #export where proto = "static1"; local as 3000; neighbor 10.10.2.1 as 3000; #next hop self; } — log syslog all; router id 10.10.2.1; protocol direct { interface "*"; # Restrict network interfaces it works with } protocol kernel { learn; # Learn all alien routes from the kernel #persist; # Don't remove routes on bird shutdown scan time 20; # Scan kernel routing table every 20 seconds import all; # Default is import all export all; # Default is export none } protocol device { scan time 10; # Scan interfaces every 10 seconds } protocol static { route 192.168.2.0/24 via 10.10.1.254; export all; } protocol bgp { multihop; #gateway recursive; import all; #export where proto = "static1"; export all; local as 3000; neighbor 10.10.1.1 as 3000; #next hop self; } — Cédric Lemarchand

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bird vs cisco/quagga
by Борис Коваленко 04 Mar '17

04 Mar '17

Hello! I'm newbie to bird. Used cisco/quagga before. But filter language of bird is very nice, so I want to try it. But I have one big misunderstanding. With other vendors each protocol has it own routing table. So OSPF may work only with ospf prefixes, BGP with bgp and so on. If we need protocol to get access to other routing tables there are redistribute XXX commands. Unfortunatelly in bird there is one "super" table by default. So i get sutiation where I have to prefixes on router, one from static protocol, and one from ibgp. Prefix from ibgp has some communities on it, and I use this communities in filters to ebgp. But static prefix always win. By some reason I can't remove static prefix and use ibgp prefix and also can't add communities to static prefix as they are changed by other router. I guess that "standard" behaviour of Cisco/Quagga may be done with bird too. May gurus tell me how to do this? Regards, Boris -- С уважением, Борис Коваленко

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how to change mtu on freebsd routes
by Илья Шипицин 28 Feb '17

28 Feb '17

Hello, I can change mtu manually like route change 192.168.1.1 -mtu 9000 change host 192.168.1.1 how can I do that on routes that come from ospf ? can I run script after route is changed ? thanks! Ilya Shipitsin

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filters, line 1360: ~ applied on unknown type pair
by Job Snijders 28 Feb '17

28 Feb '17

Hi all, I see the following pop up in the syslog, over and over again: root@eunetworks-2:/etc/bird# tail -F /var/log/syslog | grep filters Feb 24 19:34:32 eunetworks-2 bird: filters, line 1360: ~ applied on unknown type pair Feb 24 19:34:32 eunetworks-2 bird: filters, line 1360: ~ applied on unknown type pair Feb 24 19:34:32 eunetworks-2 bird: filters, line 1360: ~ applied on unknown type pair Feb 24 19:34:32 eunetworks-2 bird: filters, line 1360: ~ applied on unknown type pair Feb 24 19:34:32 eunetworks-2 bird: filters, line 1360: ~ applied on unknown type pair However, tracing down where the error comes from is not so trivial: root@eunetworks-2:/etc/bird# find /etc/bird -type f | xargs grep include | wc -l 302 root@eunetworks-2:/etc/bird# du -sh /etc/bird 48M /etc/bird root@eunetworks-2:/etc/bird# I have a glorious spaghetti spread over almost 50 megabytes of config. Anyone got any idea why I'm seeing this warning, and how I can figure out what BIRD considers 'line 1360'? Kind regards, Job

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Adding a grammar rule with conditional compilation
by Dean 28 Feb '17

28 Feb '17

Hello, I'm modifying some parts of the code, and I've added a new grammar rule for creating static routes in the config.Y file. However, I would like this rule to only be enabled based on a preprocessor definition, with an #ifdef, or throw a syntax error otherwise. I can't figure out a way to do this? Any suggestions? Thank you.

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Will bird block on syslog() call?
by Pavlos Parissis 28 Feb '17

28 Feb '17

Hi, We have observed some instability on BFD protocol, where upstream router and/or the server (Linux RedHat 7.3) declares the BFD session dead and as consequence upstream router stops forwarding traffic to the server (we utilize ECMP). Our current hypothesis is that Bird log messages (only BGP KEEPALIVE messages when there isn't any route change) via syslog glibc function, which connects to UNIX socket (/dev/log) and the sender (Bird daemon) may block when the receiver (rsyslogd) doesn't response fast enough or the buffer is full. On RedHat 7 servers there is a chain of daemons, which receive log messages via UNIX socket. systemd-journald.service listens on /dev/log UNIX SOCKET and forwards messages to /run/systemd/journal/syslog UNIX SOCKET where rsyslogd listens on. As far as I can see in the code and in the output of ps -eLl, Bird daemon is a single threaded process (please correct me if I am wrong), so it could be that a call to syslog blocks for X seconds when X is higher than the failure detection time. Can you confirm this hypothesis? Here is an sanitized config: log syslog { debug, trace, info, remote, warning, error, auth, fatal, bug }; /* Source configuration snippets Please make sure they are valid snippets for Bird */ include "/etc/bird.d/*.conf"; include "/etc/bird.d/4/*.conf"; router id 1.2.3.1; protocol device { scan time 10; } protocol static { disabled yes; } protocol direct direct1 { interface "lo"; debug all; export none; import where net ~ ANYCAST_NETWORKS; } protocol bfd BFD1 { debug { states, routes, filters, interfaces, events }; interface "north", "south" { min rx interval 400 ms; min tx interval 400 ms; idle tx interval 1000 ms; multiplier 3; }; } protocol bgp BGP1 { disabled no; description "Peer-BGP1"; neighbor 1.2.3.254 as 4; source address 1.2.3.1; bfd on; debug all; import none; export where match_route_north(); direct; hold time 10; startup hold time 240; connect retry time 120; keepalive time 3; start delay time 5; error wait time 60, 300; error forget time 300; disable after error off; next hop self; path metric 1; default bgp_med 0; default bgp_local_pref 0; local as 1; } protocol bgp BGP2 { disabled no; description "Peer-BGP2"; neighbor 1.2.4.254 as 7; source address 1.2.3.1; bfd on; debug all; import none; export where match_route_south(); direct; hold time 10; startup hold time 240; connect retry time 120; keepalive time 3; start delay time 5; error wait time 60, 300; error forget time 300; disable after error off; next hop self; path metric 1; default bgp_med 0; default bgp_local_pref 0; local as 1; } Cheers, Pavlos

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how to change OSPF route src ?
by Илья Шипицин 27 Feb '17

27 Feb '17

Hello, I run bird on centos with multiple ip addresses. what I want to achive might be easily done by running command ip route change default via $def src N.N.N.N where $def is variable and N.N.N.N is local address how can I achive that with bird ? any ospf route magic ? scripting after bird applies routes (I need to pick $def from that script) thanks! Ilya Shipitsin

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filters, line 1360: ~ applied on unknown type pair
by Борис Коваленко 27 Feb '17

27 Feb '17

Hello! AFAIK, this is line 1360 of your config. Regards, Boris -- С уважением, Борис Коваленко

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