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Help with IBGP not advertisement routes - "rejected by protocol"
by Jeronimo de A. Barros 18 Feb '15

18 Feb '15

Hi, I have two routers running bird connected to two peers where one peer is my own ISP and AS which lets us use his AS and was kind enough to allocate two /24 for our networks so that we can have two sites in different locations using BGP with a second ISP to be a multi-home system using only two /24. This is our network (I hope you can understand my sketch): Internet <-> BR1-AS1 <-> R1-AS1 <-> R2-AS1 <-> BR-AS2 <-> Internet | | ^ ^ +> BR2-AS1 <+ +-> Net1/24 +-> Net2/24 So, our main ISP has IBGP sessions from its border-routers (BRx-AS1) to our main router (R1-AS1) which in turn has another IBGP session with our second router located at a remote site (R2-AS1). R2-AS1 has an BGP session with the second ISP border router (BR-AS2). Well, when all sessions are UP, Net1 and Net2 can reach the Internet and each other without problems. But, for example, if the BGP session between R2-AS1 and BR-AS2 goes down, traffic between Net1 and Net2 continues OK, but Net2 can't reach the Internet anymore. Or, in other words, the routes received from BRx-AS1 at R1-AS1 are not being advertised to R2-AS1, in fact a "show protocol all" on R1-AS1 shows its advertising only the direct connected networks and the static routes to R2-AS1 and vice-versa: BIRD 1.4.5 ready. name proto table state since info R2-AS1 BGP master up 17:39:21 Established Router ID: x.y.w.249 Preference: 100 Input filter: ACCEPT Output filter: ACCEPT Routes: 5 imported, 10 exported, 2 preferred Route change stats: received rejected filtered ignored accepted Import updates: 5 0 0 0 5 Import withdraws: 0 0 --- 0 0 Export updates: 527178 527168 0 --- 10 Export withdraws: 20 --- --- --- 0 BGP state: Established Neighbor address: x.y.w.251 Neighbor AS: xxxx Neighbor ID: x.y.w.251 Neighbor caps: refresh restart-aware AS4 Session: internal AS4 Source address: x.y.w.249 Hold timer: 188/240 Keepalive timer: 66/80 The debug shows a lot of "rejected by protocol" messages, which I can't find a clear description of what is its meaning: 2015-02-18 16:55:48 <TRACE> kernel1 < replaced 148.208.146.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:48 <TRACE> BR1-AS1 < rejected by protocol 148.208.146.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:48 <TRACE> BR2-AS1 < rejected by protocol 148.208.146.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:48 <TRACE> R2-AS1 < rejected by protocol 148.208.146.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:49 <TRACE> BR2-AS1 > added [best] 177.10.158.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:49 <TRACE> kernel1 < replaced 177.10.158.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:49 <TRACE> BR1-AS1 < rejected by protocol 177.10.158.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:49 <TRACE> BR2-AS1 < rejected by protocol 177.10.158.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:49 <TRACE> R2-AS1 < rejected by protocol 177.10.158.0/24 via x.y.z.29 on bond1 2015-02-18 16:55:49 <TRACE> BR1-AS1 > removed 177.10.158.0/24 via x.y.z.27 on bond1 This is the template for the IBGP session between R1-AS1 and R2-AS1 (as simple as possible): template bgp ibgp_sites { local as myas; import all; export all; direct; } I know that BGP has a lot of subtle behaviors, and I'd like to know if there is any way to make this work or if it's a dead end approach. Thanks in advance for any help. Jero ps: sorry for my broken English

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"show route" command not using "table master" by default?
by Arnaud Fenioux 18 Feb '15

18 Feb '15

Hello, I’m running BIRD 1.4.5 on an IXP with this setup : "Route server with community based filtering and multiple RIBs" https://gitlab.labs.nic.cz/labs/bird/wikis/Route_server_with_community_base… I have noticed a strange behaviour of the "show route" command whenever I specify “table master” or not. (IP/AS have been anonymised in order to follow the example above) : root@rs2-th2:~# birdc "show route all 12.34.0.0/16 protocol R111x1" BIRD 1.4.5 ready. 12.34.0.0/16 via 10.0.0.11 on eth1 [R111x1 2015-02-16 10:43:59] * (100) [AS111i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 111 BGP.next_hop: 10.0.0.11 BGP.med: 0 BGP.local_pref: 100 BGP.community: (0,51706) root@rs2-th2:~# birdc "show route table master all 12.34.0.0/16 protocol R111x1" BIRD 1.4.5 ready. 12.34.0.0/16 via 10.0.0.11 on eth1 [R111x1 2015-02-17 11:05:45] * (100) [AS111i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 111 BGP.next_hop: 10.0.0.11 BGP.med: 0 BGP.local_pref: 100 BGP.community: (51706,64650) (51706,64602) (0,51706) When explicitly specifying “table master” I see communities added from filter “bgp_in_AS111”. When not specifying any table I see route from T111 (the table declared in "protocol bgp R111x1"). Actually I was expecting to have same output on both commands, as it explained in documentation : "If you want to see routes that where accepted from this router to the master routing table then type: bird> show route protocol R222x1" Does any body also noticed this behaviour? Regards, -- Arnaud Fenioux Network Engineer - FranceIX

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Re: Patch to reveal more information in SHOW ROUTE
by Andrew Francis 17 Feb '15

17 Feb '15

Hi Ondrej + Ondrej, Sorry for going quiet for a while. I can probably send an actual patch in a couple of days; is there anything I can do make things easier? Also, is there an indent command I can run to align my spacing with all the other code in the project? :) Thanks Andrew Francis | *Twitch* <http://www.twitch.tv/> | Engineering On Mon, Jan 26, 2015 at 1:11 PM, Ondrej Zajicek <santiago(a)crfreenet.org> wrote: > On Fri, Jan 23, 2015 at 09:16:59PM -0800, Andrew Francis wrote: > > Thanks Ondrej, > > > > That query does seem to return all the routes of interest, but it takes a > > long time (many seconds per query). I'm guessing it's not FIB > accelerated? > > That is true, "show route where 192.168.168.168 ~ net" just applies filter > (where ...) to all routes. > > -- > 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] Dynamic BGP templates
by Alexander V. Chernikov 15 Feb '15

15 Feb '15

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BIRD Issues for a Newbie
by J Boyle 06 Feb '15

06 Feb '15

Hi, very new to BIRD, we use Quagga but I'm looking at implementing both. I have a Cisco 7200 peering with BIRD, as soon as I enable the peering the 7200 gets the full internet routing table but then hits 100% CPU until I disable the peering. I have peered the 7200 with Quagga and sent the full table and it has no problems at all, sits at around 40% CPU with the same full table. Here is the relevant config which is very basic, I've changed most of the settings without any change in the behaviour :( 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 # kernel table 5; # Kernel table to synchronize with (default: main) } # This pseudo-protocol watches all interface up/down events. protocol device { scan time 1000; # Scan interfaces every 10 seconds protocol bgp RR_Test { description "RR_Test"; local as yyyy; neighbor x.x.x.x as yyyy; rr client; # export filter bgp_out; rr cluster id 0.0.0.10; export all; multihop; # import filter bgp_in; next hop self; source address x.x.x.x; ________________________________ NOTICE AND DISCLAIMER This e-mail (including any attachments) is intended for the above-named person(s). If you are not the intended recipient, notify the sender immediately, delete this email from your system and do not disclose or use for any purpose. We may monitor all incoming and outgoing emails in line with current legislation. We have taken steps to ensure that this email and attachments are free from any virus, but it remains your responsibility to ensure that viruses do not adversely affect you

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RAdv and AdvRouterAddr
by Vangass 06 Feb '15

06 Feb '15

Hi, Is it possible to configure Bird to set the AdvRouterAddr value in RAdv protocol? Now AdvRouterAddr is send with local-link address but I want to set it to send default gateway from advertised prefix. I did this using radvd but cannot in Bird. Best regards, Vangass

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Configure Bgp add path
by Ste Bsd 05 Feb '15

05 Feb '15

Hello I need your help for BGP add Path I have bird on Openbsd server in my lab and I would like configure add path but when add this line in config file there is a "syntax error message" . bird version is 1.4.0 openbsd 5.5 ths Steck

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$Protocol State changed to up
by Bartosz Radwan 04 Feb '15

04 Feb '15

Hi there We're using bird as bgp router, have several upstram sessions established. Recently, I've switched on states logging using debug protocols {states}; I've noticed one of the bgp protocols emits State changed to up events on regular time basis: 2015-01-30T07:06:11+01:00 BGP-1 IX_RS2: State changed to up 2015-01-31T07:06:14+01:00 BGP-1 IX_RS2: State changed to up 2015-02-01T07:06:11+01:00 BGP-1 IX_RS2: State changed to up 2015-02-02T07:06:12+01:00 BGP-1 IX_RS2: State changed to up One and just one upstram. How should i interpret this? What is the equivalent of "State changed to up" in BGP finite state machine? Forgive me my lazyness, the answer is in the bird source for sure, but haven't enough time or knowledge to find out. Thanks in advance. -- A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? Bartosz Radwan

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use Bird to lookup origin AS of given IP address
by 伊藤高一 02 Feb '15

02 Feb '15

Hello team I'm Koh-ichi Ito, from Japan. I'm working on development of JPIX(one of major IX in Japan)'s sFlow collector/analyzer. It has the function to lookup origin AS of both src/dst IP addresses on each flow samples and I'm going to implement it with Bird, so my counterpart person of JPIX advised me to subscribe this list and say hello you guys, so allow me to do so now. The unusual point of usage on my project is that frequently(yes, twice for each flow samples) issue of 'show route for x.y.z.w' via /var/run/bird.ctl (and bird6.ctl, too). I afraid that this wakes up hiding bugs. As of now, my prototype on test bench (not launched to the production yet) seems to work fine and I hope you to help me when I experience problems in the future. Thanks in advance. Koh-ichi Ito -- ----------------------------------------------------------- このメールおよびメールに添付されるファイルは当社の秘密情報を含んでいます。企図された受取人以外の者が使用すること、開示すること、複製することまたは配布をすることはできません。誤ってこのメールを受領された場合、送り主あてに返信メールでお知らせいただき、お手元にある全ての複製（サーバーに保存されたものも含み）消去をいただくようお願いします。ご協力有難うございます。 This email and any files transmitted with it may contain confidential information. Use, disclosure, copying or distribution of this message by anyone other than the intended recipient is strictly prohibited. If you have received this email in error please notify the sender by reply email and destroy all copies of this message in your possession, custody or control. THANK YOU IN ADVANCE FOR YOUR COOPERATION. . -----------------------------------------------------------

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Bird 1.4.0 - Process suddenly disappeared
by Nikita Borisenkov 29 Jan '15

29 Jan '15

Hello, today we have a problem with our network. When connectivity problems between routers were solved, we noted that bird process not running. The process suddenly disappeared without any messages to logs. last lines from Bird trace log: 2015-01-29 16:36:12 <TRACE> bfd1: Session to 87.244.33.248 expired 2015-01-29 16:36:12 <TRACE> bfd1: Session to 87.244.33.248 changed state from Up to Down 2015-01-29 16:36:12 <TRACE> bgp_mtik_36: BFD session down 2015-01-29 16:36:12 <TRACE> bgp_mtik_36: State changed to flush 2015-01-29 16:36:12 <TRACE> bgp_mtik_36: BGP session closed 2015-01-29 16:36:12 <TRACE> bfd1: Session to 87.244.33.248 changed state from Down to Init 2015-01-29 16:36:12 <TRACE> bgp_mtik_36: State changed to stop 2015-01-29 16:36:13 <TRACE> bgp_mtik_36: Down 2015-01-29 16:36:13 <TRACE> bfd1: Session to 87.244.33.248 removed 2015-01-29 16:36:13 <TRACE> bgp_mtik_36: Starting # service bird start ... 2015-01-29 17:16:11 <TRACE> kernel1: Initializing ... We use bird 1.4.0 It can be a problem which was solved in commit 864f52a5f4c47ac8dc44a8808beb7f038cbf9899 - "Fixes nasty bug in BFD"? or this is something else?

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