March 2015 - Bird-users - Mailing Lists

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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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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IS-IS
by kveri new 01 Jun '15

01 Jun '15

Hello, I would like to implement IS-IS as a part of my master thesis. Are there any apparent problems which would prevent successful implementation, political and/or technical? Also I would like to hear opinions of the authors. Implementation timeframe is 2013 (if we live past 21th). Regards, Martin Čechvala Faculty of Informatics and Information Technologies Slovak Technical University

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OSPF route selection
by Thomas Goldberg 22 May '15

22 May '15

Hello, we're using OSPF for anycast routing and came across a small problem. We've a BIRD v1.4.4 router which sits in area 0 and 16. Here's the relevant state information (10.236.144.144/32 is announced from two different routers in two areas): area 0.0.0.0 router 10.236.144.241 distance 33 external 10.236.144.144/32 metric 1 area 0.0.0.16 router 10.17.224.253 distance 111 external 10.236.144.144/32 metric 1 The route via area 16 is considered best: 10.236.144.144/32 via 10.176.3.29 on vlan542 [o_internal 2014-10-07 16:49:56] * E1 (150/112) [10.17.224.253] Given that both E1 routes are reachable via intra-area paths. We're wondering why the path via area 16 (higher costs than area 0) is chosen. Is this the intended behavior? Is there any way to make bird prefer routes via a specific/backbone area in a situation like this? Best Regards, Freddy

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OSPF anycast prefix being filtered
by Patrik Lundin 11 Apr '15

11 Apr '15

Hello, I am trying to use BIRD for anycasting a /32 prefix via OSPF and I am not able to get the announcement to work. My idea is to have the server use the normal default gw for routing packets. Because of this I see no reason for importing routes from OSPF into the kernel routing table, I am only interested in exporting the anycast address that is configured on the loopback interface. I configure a /32 prefix on the loopback interface like so: === # ip address add yyy.yyy.yyy.yyy/32 dev lo === My bird.conf looks like this: === router id xxx.xxx.xxx.xxx; debug protocols all; protocol device {} protocol ospf { import none; # Default is import all export all; area 0.0.0.0 { interface "eth*" { authentication cryptographic; password "pass"; }; interface "lo" {}; }; } === It seems however that the address on lo (as well as eth0) is being "filtered out" by BIRD, as seen in debug mode: === # bird -d bird: device1: Initializing bird: ospf1: Initializing bird: device1: Starting bird: device1: Scanning interfaces bird: device1: Connected to table master bird: device1: State changed to feed bird: ospf1: Starting bird: ospf1: Adding area 0.0.0.0 bird: ospf1: Connected to table master bird: ospf1: State changed to feed bird: Started bird: device1: State changed to up bird: ospf1 < interface lo goes up bird: ospf1 < primary address yyy.yyy.yyy.yyy/32 on interface lo added bird: ospf1: Adding interface lo (yyy.yyy.yyy.yyy/32) to area 0.0.0.0 bird: ospf1 < secondary address 127.0.0.0/8 on interface lo added bird: ospf1 < interface eth0 goes up bird: ospf1 < primary address zzz.zzz.zzz.zzz/30 on interface eth0 added bird: ospf1: Adding interface eth0 (zzz.zzz.zzz.zzz/30) to area 0.0.0.0 bird: ospf1: State changed to up bird: ospf1: Changing state of iface eth0 from down to ptp bird: ospf1: Scheduling router-LSA origination for area 0.0.0.0 bird: ospf1: HELLO packet sent via eth0 bird: ospf1: Changing state of iface lo from down to waiting bird: ospf1: Scheduling router-LSA origination for area 0.0.0.0 bird: ospf1: Originating router-LSA for area 0.0.0.0 bird: ospf1: Scheduling routing table calculation bird: ospf1: Starting routing table calculation bird: ospf1: Starting routing table calculation for area 0.0.0.0 bird: ospf1: Starting routing table calculation for inter-area (area 0.0.0.0) bird: ospf1: Starting routing table calculation for ext routes bird: ospf1: Starting routing table synchronisation bird: ospf1 > filtered out zzz.zzz.zzz.zzz/30 dev eth0 bird: ospf1 > filtered out yyy.yyy.yyy.yyy/32 dev lo [...] === I guess I am missing something obvious, any pointers would be much appreciated! -- Patrik Lundin

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per interface route filtering
by olivier a 08 Apr '15

08 Apr '15

Is there a way to filter RIP announced routes on an interface basis ? I've had a look at the filtering part in the doc, but I'm still clueless about this ... Thanks for any help :-)

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RIP TTL security Ubuntu bug ?
by olivier a 07 Apr '15

07 Apr '15

Hi Trying to use 'ttl security enable' with RIP protocol in BIRD, I get : /etc/bird.conf, line 30, syntax error It happens on three machines : . Ubuntu 14.04 LTS / Bird installed by repository . Ubuntu 14.04 LTS / Bird installed with 1.4.5 sources compile . Raspbian OS, Bird installed with 1.4.5 sources compile I tried with different syntaxes ( enable, yes, on, .. ) with same pb Did I miss a compile option ? ttl security if functioning OK with BIRD/BGP Thanks for any insight :-)

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BIRD / BGP / IPv6 / source address directive : auto vs link local vs GUA
by olivier a 04 Apr '15

04 Apr '15

Hi ! I'm learning BGP and I'm really puzzled about the 'source address' directive in the context of IPv6. I've seen some people explicit a GUA source address ( example : source address 2001:db8:0:0::1; ) Reading the documentation, watching the debug logs and playing with bird6c didn't help me understand. Leaving to auto ( no directive ) was functioning ok, but my BGP setup is rather simple. What is better ? No directive, link local or Global Unicast Address ? Thank you for any clue :-)

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Modifying function called in filter does not take effect
by Eric Cables 01 Apr '15

01 Apr '15

I'm hoping someone can tell me whether this behavior is expected or not. I am using BIRD as a RR, and running into a behavior where modifying a policy, within a function called by a filter, requires a hard BGP session reset or stop/start of BIRD, rather than a 'configure soft.' Route Refresh is supported by the RR client. I am using a unique filter for each RR client; each filter calls a function that is shared amongst all filters -- basically matching routes that all RR clients should receive. This was first instantiated with a single BGP community match in the function, and a 'configure soft' worked fine. I then went back and added a second if statement to the function, expecting 'configure soft' to put the new policy into effect, but what I noticed is that the only way for RR clients to receive the newly accepted routes was to hard down/up the BGP session. Anecdotally, a 'show route filter router1_out' (after 'configure soft') did match the routes I was expecting the RR client to receive, but until the BGP session was hard cleared to the RR client, they were not advertised by BIRD. Here is the relevant configuration (I've bolded the new configuration that was added, which did not result in an advertisement to the RR client): # RR client template template bgp rr_client { description "Template for route reflector clients"; local as 65412; hold time 180; source address 2.2.2.2 ; rr client; rr cluster id 1.1.1.1; import all; export none; add paths; } # Globally reflected routes function function global_routes() { # Match 65000-65499,100-200 if bgp_community ~ [(65000..65499,100..200)] then accept; * # Match 65000-65499,300-400* * if bgp_community ~ [(65000..65499,300..400)] then accept;* } # Outbound filter for router1 filter router1_out { global_routes(); reject; } protocol bgp 'router1' from rr_client { neighbor 1.2.3.4 as 65412; import all; export filter router1_out; } As mentioned, the output of 'show route filter router1_out' (after a 'configure soft') did return the expected routes, but they were not advertised to the 'router1' RR client until the session was hard cleared. Is this expected behavior? -- Eric Cables

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Is it good practice to use same router id for bird and bird6 ?
by olivier a 28 Mar '15

28 Mar '15

Hi ! Is it good practice to use same router id for bird and bird6 ? I'm wondering if there are some drawbacks or pitfalls ? I'm using RIP, OSPF and BGP Thanks for any advice :-)

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