- Bird-users - Mailing Lists

How the prefix sets are implemented?
by 3.listas＠adminlinux.com.br 25 Feb '13

25 Feb '13

Hi, To filter the routes that my router gets in my BGP session, I implemented a filter like this: filter ebgp_in prefix set IMPORT_BLACKLIST; { IMPORT_BLACKLIST = [ 0.0.0.0/8+, 10.0.0.0/8+, 14.0.0.0/8+, 24.0.0.0/8+, 39.0.0.0/8+, 127.0.0.0/8+, 128.0.0.0/16+, 169.254.0.0/16+, 172.16.0.0/12+, 191.255.0.0/16+, 192.0.0.0/24+, 192.0.2.0/24+, 192.88.99.0/24+, # Disabled only in the testing environment #192.168.0.0/16+, 198.18.0.0/15+, 223.255.255.0/24+, 224.0.0.0/4+, 240.0.0.0/4+ ]; if net ~ IMPORT_BLACKLIST then { printn "Discarding received route to "; print net; reject; } accept; } filter ebgp_out { if source = RTS_STATIC then { bgp_med = BGP_MED; accept; } reject; } protocol bgp eBGP { description "eBGP"; local as 65000; source address 192.168.101.1; neighbor 192.168.100.1 as 65111; multihop 2; default bgp_local_pref 200; export filter ebgp_out; import filter ebgp_in; } As you can see, I use the variable "prefix set IMPORT_BLACKLIST" to store a blacklist. My doubt is about the implementation of the type "set". Which data structure is used in the implementation of the "set" type (linked list, tree, hash ...)? Thanks -- Thiago Henrique www.adminlinux.com.br

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print BGP AGGREGATOR attribute?
by Job Snijders 25 Feb '13

25 Feb '13

Dear all, I want to inject information into syslog when certain magic prefixes are announced or withdrawn. So far I have this snippet of configuration, but I'd also like to print the BGP AGGREGATOR ip address, and the AGGREGATOR AS number. How can I do this? filter collector_in { if (net ~ [ 84.205.64.0/24, 84.205.65.0/24 ]) then { print "MAGIC PREFIX SIGNALLED: " , net, "' from AS", bgp_path.last, " via AS", bgp_path.first, " [", proto, "]"; accept; } else accept; } How can I get BIRD to print something when a prefix is withdrawn? Kind regards, Job

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ASK about BPG multiple routing table
by Ika Kushati 25 Feb '13

25 Feb '13

Hello,, I have a project using BIRD on Debian. It's my first time using BIRD and actually I don't really understand how to use it. The project is: There are 3 routers using Debian. R1----R2---R3 I must configure prefix from R1 will be updated on T100 table on R2 and prefix from R3 to T200 table. I have finished to make all routers connecting each other. But then i dont know what next step is. Should I configure iproute first or BIRD first? And how to configure it? I hope you can help me. Thank you.Sorry for bad english.

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Maximum variable length
by Stanislav Datskevich 23 Feb '13

23 Feb '13

Hi! Have BIRD a restriction in prefix set variable length? I.E. my peer announce me upto 5000 prefixes - can I put all prefixes in one prefix set variable?

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Fwd: bird rib dump
by Andrew Latham 21 Feb '13

21 Feb '13

---------- Forwarded message ---------- From: Randy Bush <randy(a)psg.com> Date: Thu, Feb 21, 2013 at 5:11 PM Subject: bird rib dump To: North American Network Operators' Group <nanog(a)nanog.org> a friend trying to see if bird will be better than quagga for bgp recording can not see how to get rib dumps, as opposed to just updates. what are we missing? randy -- ~ Andrew "lathama" Latham lathama(a)gmail.com http://lathama.net ~

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bird reflector: release 20130222
by Alexander V. Chernikov 21 Feb '13

21 Feb '13

Hello list! Changelog: * Use 1.3.9 as reflector base * Several small bugs fixed * Major arch redesign (kernel <> LDP interaction) Link: http://bird.mpls.in/distfiles/bird/bird-20130222.tar.gz Documentation: http://bird.mpls.in/projects/mpls-bird/wiki/Bird_rr Git: http://bird.mpls.in/projects/mpls-bird/repository/show?rev=bird_mpls Setup: Do configure with --enable-mpls switch (FreeBSD example) ./configure --prefix=/usr/local --mandir=/usr/local/man --infodir=/usr/local/info/ --build=amd64-portbld-freebsd8.2 --enable-mpls FreeBSD users should use net/bird-devel port, update is coming. Feel free to send questions/suggestions/patches.

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Re: iBGP
by Miłosz Oller 21 Feb '13

21 Feb '13

After add comment next hop self and add gateway direct: protocol static { route 91.231.205.0/24 reject; route 91.237.68.0/22 reject; } [..] # next hop self; gateway direct; [..] bird> show route 91.231.205.0/24 all 91.231.205.0/24 unreachable [static1 15:27] * (200) Type: static unicast univ via 91.231.205.193 on eth0 [bgp_syscom 15:27] (100) [i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: BGP.next_hop: 91.231.205.193 BGP.local_pref: 100 Why static route is unreachable? On both routers are two prefixes in static protocol. On second router is the same problem. -- Miłosz Oller Dnia 2012-12-30, nie o godzinie 14:14 +0200, Roman Skopenko pisze: > On 30.12.2012 14:02, Miłosz Oller wrote: > > Session on router no.2: > > protocol bgp bgp_r1_ibgp { > > description "iBGP"; > > import all; > > export all; > > next hop self; > > local as 198611; > > neighbor 91.231.205.193 as 198611; > > source address 91.231.205.194; > > } > > > > bird> show route 91.231.205.0/24 all > > 91.231.205.0/24 unreachable [static1 14:36] * (200) > > Type: static unicast univ > > unreachable [bgp_r2_ibgp 14:37 from 91.231.205.193] > > (100/-) [i] > > Type: BGP unicast univ > > BGP.origin: IGP > > BGP.as_path: > > BGP.next_hop: 91.231.205.193 > > BGP.local_pref: 100 > > > > Any ideas? > > > > I am not sure... > try (if neigbour unreach) > gateway direct; > or/and (if prefixes do not pass thru) > rr client; >

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export "show route" into file
by Jan Markus 19 Feb '13

19 Feb '13

Hello, is there a way to export the output of "show route" into file? Thank you.

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Re: Incorrect manual next hop attribute
by Ondrej Zajicek 18 Feb '13

18 Feb '13

On Tue, Feb 05, 2013 at 11:15:06AM +0200, Jordan Grigorov (Neterra NMT) wrote: > Hello, > > I think our scenario does not contradicts with BGP standard (RFC 4271 > 5.1.3). > > Assuming a Bird RS with 2 interfaces: > 192.168.0.1/24 eth0 <--> BIRD <--> eth1 10.0.0.1/24 > > We would like to manually set hext hop(192.168.0.50) of certain routes > advertised to BGP neighbors in the segment 192.168.0.0/24. So you receive route from eth1, change its next hop to 192.168.0.50 and announce to eth0? BIRD checks (for single hop eBGP) whether route was received on the same iface as it is send, but that is done before export filter. Did you modify the next hop in the export filter of outgoing BGP or in the import filter of incoming BGP? Did you really modify it? (You could check that by print in export filter.) How exactly looks your filter? -- 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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20Mbps bgp traffic
by Tapio Haapala 15 Feb '13

15 Feb '13

Hello, I just noticed that one of my routers send 20Mbps bgp traffic to another router. It starts last night after configure command. Is it possible that it is caused by wrong configuration or is it just bug? -- F-Solutions Oy Tapio Haapala PL7, 90571 Oulu GSM 0400 998371 Skype burner- IRC Burner@ircnet

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