- Bird-users - Mailing Lists

BIRD unable to read data from TUN/TAP device
by Cyrill Gössi 14 Jan '14

14 Jan '14

Hi I'm trying to let BIRD communicate over virtual network devices created by the Linux TUN/TAP module. As it seems the tap devices receive the messages from BIRD. However, BIRD does not seem to receive the messages sent to it over the tap device. I described the scenario and the issues I run into in more detail on stackoverflow. If somebody has some experience with running BIRD over TUN/TAP devices, please take a look here: http://stackoverflow.com/questions/21001713/linux-tun-tap-unable-to-read-da… Much thanks to anybody that can provied me with some insights into the issue! Best, Cyrill

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OSPF getting forwarding address wrong
by Tore Anderson 14 Jan '14

14 Jan '14

Hi, My anycast nodes exports the availability of their services by configuring /32s configured on the loopback intefaces. These are in turn exported to the OSPF protocol running on bond0: $ birdc 'show interfaces' BIRD 1.3.11 ready. lo up (index=1) MultiAccess AdminUp LinkUp Loopback Ignored MTU=65536 192.0.2.1/32 (Primary, scope univ) 127.0.0.1/8 (Unselected, scope host) 192.0.2.2/32 (Unselected, scope univ) 192.0.2.5/32 (Unselected, scope univ) 192.0.2.3/32 (Unselected, scope univ) 192.0.2.4/32 (Unselected, scope univ) 192.0.2.6/32 (Unselected, scope univ) [..skipping DOWN ifs...] bond0 up (index=6) MultiAccess Broadcast Multicast AdminUp LinkUp MTU=1500 192.0.2.114/28 (Primary, scope univ) Now, there are something strange going on here. Sometimes, and I have not yet been able to understand when or how or why it happens, the resulting Type-7 LSAs that get sent to the upstream router has a forwarding address that is one of the other service addresses configured on "lo", instead of the actual address on "bond0". The upstream router (running JUNOS) doesn't install these routes in its forwarding table, which means that the anycasted service doesn't attract the traffic as it should. This is what the router sees: tore@rtr> show ospf database lsa-id 192.0.2.1 extensive Area 1.2.3.4 Type ID Adv Rtr Seq Age Opt Cksum Len NSSA 192.0.2.1 192.0.2.114 0x8000122a 1145 0x8 0x90ab 36 mask 255.255.255.255 Topology default (ID 0) Type: 2, Metric: 10000, Fwd addr: 192.0.2.114, Tag: 0.0.0.0 Aging timer 00:40:55 Installed 00:19:04 ago, expires in 00:40:55, sent 00:19:02 ago Last changed 13w5d 21:57:44 ago, Change count: 1 Standby flood status Idle {master:0} tore@rtr> show ospf database lsa-id 192.0.2.2 extensive Area 1.2.3.4 Type ID Adv Rtr Seq Age Opt Cksum Len NSSA 192.0.2.2 192.0.2.114 0x800000e8 1388 0x8 0x51a9 36 mask 255.255.255.255 Topology default (ID 0) Type: 2, Metric: 10000, Fwd addr: 192.0.2.6, Tag: 0.0.0.0 Aging timer 00:36:51 Installed 00:23:07 ago, expires in 00:36:52, sent 00:23:05 ago Last changed 4d 19:56:46 ago, Change count: 1 Standby flood status Idle I have confirmed with tcpdump running on the anycast node that the forwarding address in the LS-Update packets sent by BIRD is indeed 192.0.2.6. So at the time of writing, I have the following: LSA-ID 192.0.2.1: forwarding address 192.0.2.114 (works fine) LSA-ID 192.0.2.2: forwarding address 192.0.2.6 (doesn't work) LSA-ID 192.0.2.3: forwarding address 192.0.2.6 (doesn't work) LSA-ID 192.0.2.4: forwarding address 192.0.2.6 (doesn't work) LSA-ID 192.0.2.5: forwarding address 192.0.2.6 (doesn't work) LSA-ID 192.0.2.6: forwarding address 192.0.2.114 (works fine) The only way I've found to actually fix this is to remove and re-add the address: $ ip address del 87.238.33.2/32 dev lo $ ip address add 87.238.33.2/32 dev lo This causes BIRD to re-send the LS-Update with 192.0.2.114 and now the JUNOS route installs it to its FIB and the anycast service starts receiving traffic. The remaining three addresses remain defective. Question is: Why is this happening? Bug, or am I doing something wrong? Tore

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BIRD unable to read date from TUN/TAP device
by Cyrill Gössi 13 Jan '14

13 Jan '14

Hi I'm trying to let BIRD communicate over virtual network devices created by the Linux TUN/TAP module. As it seems the tap devices receive the messages from BIRD. However, BIRD does not seem to receive the messages sent to it over the tap device. I described the scenario and the issues I run into in more detail on stackoverflow. If somebody has some experience with running BIRD over TUN/TAP devices, please take a look here: http://stackoverflow.com/questions/21001713/linux-tun-tap-unable-to-read-da… Much thanks to anybody that can provied me with some insights into the issue! Best, Cyrill

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about ecmp
by 曾小小 11 Jan '14

11 Jan '14

Hello, I want to use the ospf protocol ecmp function, load balancing local to remote devices. Interface uses ipip tunnel connected. the local use FreeBSD 10.0-BETA1 and BIRD 1.3.11, using fib support multiple routing tables, gif interface is configured for parallel tunnels by setting the sysctl variable net.link.gif.parallel_tunnels to 1. the remote use Ubuntu 13.04 and Quagga (version 0.99.22). Configured as follows: protocol ospf ospf_gif { table tab_ospf_gif; router id 192.168.148.17; ecmp yes ; export all; import all; preference 200; area 0.0.0.10 { interface "gif0" { ecmp weight 3; hello 10; retransmit 5; cost 10; transmit delay 1; dead count 4; wait 40; type pointopoint; priority 0; authentication cryptographic; password "abc"; }; interface "gif1" { hello 10; retransmit 5; cost 10; transmit delay 1; dead count 4; wait 40; type pointopoint; priority 0; authentication cryptographic; password "abc"; }; }; } protocol pipe pipe_gif { table tab_ospf_gif; peer table master; import none; export all; } protocol kernel kernel_gif { debug all; table tab_ospf_gif; export all; kernel table 10; scan time 15; } In the test if configured ecmp function, the local device using bird view master table, tab_ospf_gif two tables are learning two equal cost routes to the remote device (see below). bird> show route table master 1007-0.0.0.0 / 0 multipath [ospf_gif 18:18] * E2 (200/10/10) [xxxx] via 192.168.170.41 on gif0 weight 3 via 192.168.170.149 on gif1 weight 1 bird> show route table tab_ospf_gif 1007-0.0.0.0 / 0 multipath [ospf_gif 18:18] * E2 (200/10/10) [xxxx] via 192.168.170.41 on gif0 weight 3 via 192.168.170.149 on gif1 weight 1 But I can not see the route to the fib in freebsd. Why? ? I look protocols, found that the route was refused entry, as follows: 1002-kernel_gif Kernel tab_ospf_gif up 18:42 1006- Preference: 10 Input filter: ACCEPT Output filter: ACCEPT Routes: 0 imported, 0 exported, 0 preferred Route change stats: received rejected filtered ignored accepted Import updates: 0 0 0 0 0 Import withdraws: 0 0 --- 0 0 Export updates: 3 3 0 --- 0 Export withdraws: 0 --- --- --- 0 Use debug discovery and found the following: 09-01-2014 23:58:45 <TRACE> kernel_gif <rejected by protocol 0.0.0.0 / 0 multipath 09-01-2014 23:58:45 <TRACE> kernel_gif <rejected by protocol 192.168.170.40/30 multipath 09-01-2014 23:58:45 <TRACE> kernel_gif <rejected by protocol 192.168.170.148/30 multipath If I do not use ecmp function, fib table freebsd system can view the routing entries, but only a single path. thank you very much.

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Looking for freelance developper for BIRD dev
by Julien Ducros 05 Jan '14

05 Jan '14

Hi, We need some modifications in BIRD and i'm looking for a developper for a fews days of work. All developpements could be added to bird with free license if the BIRD team is interested with our contributions. Thanks for your private reply. Julien

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Installation error
by Radoslaw Rams 01 Jan '14

01 Jan '14

Hello all, I have problem installing BIRD 1.3.11 (same problem with 1.4) on Debian (rel. 7.3). After installing libreadline6-dev library configuration passed with following result: BIRD was configured with the following options: Source directory: . Object directory: obj Iproute2 directory: /etc/iproute2 System configuration: ./sysdep/cf/linux.h Debugging: no Routing protocols: bgp ospf pipe rip static Client: yes But when I run make command I get error: .... ../../client/birdc.c:16:20: fatal error: curses.h: File or catalog not found compilation terminated. make[2] : *** [birdc.o] Error 1 make[2] : Leaving '/home/user/bird-1.4/obj/client' catalog make[1] : *** [subdir] Error 2 make[1] : Leaving '/home/user/bird-1.4/obj' catalog make: *** [all] Error 2 Best regards, Radoslaw

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feature request: ecmp hash algorithm
by k simon 31 Dec '13

31 Dec '13

Hi,list, I planed use bird box as a load balancer, but I did'nt know bird's ecmp implemention weather support per-connection or per-packet.(I used FREEBSD platform.) And now, bird cannot config ECMP hash algorithm FTOS 9.2(0.0)/9.2(0.2) Configuration Guide for the S4820T System , such as SIP, DIP ,SIP XOR DIP, port etc, base on tulple. Support it will be cool. thanks Simon

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Blackhole for DDoS mitigation
by Andre Nathan 30 Dec '13

30 Dec '13

Hello Let's say I'm facing a DDoS attack against one of my IP addresses. The attack is against a single IP, but it's flooding my network and taking it dow, so I'd like to blackhole it in my Bird router to mitigate the effects of the attack. Is this configuration enough to blackhole an address, say a.b.c.d? protocol static blackhole { table master; route a.b.c.d/32 blackhole; import all; } Thank you, Andre

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System requirements for BIRD
by Tigran Zakoyan 23 Dec '13

23 Dec '13

Dear collegues, I failed to find anything regarding the subject. Could somebody give some prompts on it? Particularily, is a config like CPU: intel ATOM D2550 Dual Core 1.86G 4 thread DDR3 4Gb (or 8Gb) suitable for a 3 GBIT interface BGP router with 2 full view uplinks? I am intending to use something like this: http://www.aliexpress.com/item/2013-New-fanless-network-1U-server-with-inte… Thanks to the dev team, and kind regards. Tigran Zakoyan.

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netflix uses bird
by Allan Pinto 22 Dec '13

22 Dec '13

https://signup.netflix.com/openconnect/software got it off hacker news, thats cloudflare and netflix now -- Thanx and regd's. Allan. http://tamahatta.com

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