- Bird-users - Mailing Lists

IPv6, route reflectors and link-local nexthops
by Jan-Philipp Litza 11 Nov '19

11 Nov '19

Hi list, maybe this question boils down to "How can I tell bird to always use global IPv6 addresses as nexthops". But let me give you a sketch of my problem: RR ---- R1 ---- R2 Addresses: RR 2001:db8:1::100, fe80:1::100%I1 R1 2001:db8:1::1, fe80:1::1%I1 2001:db8:2::1, fe80:2::1%I2 R2 2001:db8:2::2, fe80:2::2%I2 RR is an route reflector with * a direct iBGP session to R1 / 2001:db8:1::1, and * a multihop eBGP session to R2 / 2001:db8:2::2. As RR isn't supposed to forward any traffic, it has "missing lladdr ignore" set on the iBGP session. R1 and R2 don't talk to each other. Let's suppose R2 announces a route for 2001:db8:3::/64 RR sees this route: > bird> show route all 2001:db8:3::/64 > 2001:db8:3::/64 unicast [R2 2019-10-10 from 2001:db8:2::2] * (100/100) [AS4242424242?] > via fe80:1::1 on I1 > Type: BGP univ > BGP.origin: Incomplete > BGP.as_path: 4242424242 > BGP.next_hop: 2001:db8:2::2 > BGP.local_pref: 100 The nexthop is correctly set to the link-local address of R1 that RR can reach. Notice the missing link-local BGP.next_hop, however. Now RR exports this route to R1, and this is where things go wrong: > bird> show route all 2001:db8:3::/64> 2001:db8:3::/64 unicast [RR 2019-10-10 from 2001:db8:1::100] * (100/0) [AS4242424242?] > via fe80:1::100 on I2 > Type: BGP univ > BGP.origin: Incomplete > BGP.as_path: 4242424242 > BGP.next_hop: 2001:db8:2::2 > BGP.local_pref: 100 R1 correctly identifies the BGP.next_hop as being on-link for I2, but uses the link-local address of RR on the interface to R2 as nexthop. (Actually, it's even worse: R1 doesn't really use fe80:1::100 as nexthop, but the link-local address of the peer that was formerly in the place of RR. That address isn't even present anymore on any server anywhere!) I understand the R1 has no way of knowing the link-local address of R2, because it was never part of the BGP.next_hop. But the link-local address of RR was never part of BGP.next_hop, either! So, Questions: Why does bird use link-local nexthops at all, when all neighbors are configured using global addresses? How is it possible that bird uses the link-local address of RR decoupled from its interface? Is there anything I can do to make R1 use the global address (which is the only address in BGP.next_hop) of R2 as the nexthop? Best regards, Jan-Philipp Litza -- Jan-Philipp Litza PLUTEX GmbH Hermann-Ritter-Str. 108 28197 Bremen Hotline: 0800 100 400 800 Telefon: 0800 100 400 821 Telefax: 0800 100 400 888 E-Mail: support(a)plutex.de Internet: http://www.plutex.de USt-IdNr.: DE 815030856 Handelsregister: Amtsgericht Bremen, HRB 25144 Geschäftsführer: Torben Belz, Hendrik Lilienthal

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Configuring RPKI returns syntax error, unexpected CF_SYM_UNDEFINED
by Brooks Swinnerton 10 Nov '19

10 Nov '19

Hello, I'm trying to configure RPKI in BIRD 2.0.6. With the following configuration: ``` 200 roa4 table r4; 201 roa6 table r6; 202 203 protocol rpki gortr { 204 roa4 { table r4; }; 205 roa6 { table r6; }; 206 207 remote "rpki.neptunenetworks.org" port 8282; 208 209 retry keep 90; 210 refresh keep 900; 211 expire keep 172800; 212 } ``` I receive the following when loading the configuration: ``` bird> configure soft Reading configuration from /etc/bird.conf /etc/bird.conf:203:10 syntax error, unexpected CF_SYM_UNDEFINED ```

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OSPF graceful restart for unplanned outage?
by Kenth Eriksson 08 Nov '19

08 Nov '19

Hi! Does bird support OSPF graceful restart for unplanned outage? The doc only speaks about planned outage. Section 5 in RFC 3623 describes that OSPF GR mechanism may be used for unplanned outage. Thanks, Kenth

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Debian signing public key
by mikero＠initq.de 07 Nov '19

07 Nov '19

Hello BIRD Team, The public key for signing debian packages is expired. Could you update the public key so we can update our systems without having to --allow-unauthenticated ? Best Regards, Marvin

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Signal readyness to systemd
by Jan-Philipp Litza 06 Nov '19

06 Nov '19

Hi everyone, I had the idea to signal systemd via sd_notify[1] when all routes have been synchronized so that other units depending on a fully functioning network can be started after this point (e.g. keepalived/other cluster services). How would you go about implementing this? I thought about implementing a pseudo-protocol "systemd" that hooks into graceful restart recovery, but that would only work when starting bird with graceful restart recovery enabled. Ideally, it could work anyway, although maybe semantically, that makes sense. Also, is this something that other people are interested in? Does a patch have chances to get merged? Best regards, Jan-Philipp Litza [1]: https://www.freedesktop.org/software/systemd/man/sd_notify.html -- Jan-Philipp Litza PLUTEX GmbH Hermann-Ritter-Str. 108 28197 Bremen Hotline: 0800 100 400 800 Telefon: 0800 100 400 821 Telefax: 0800 100 400 888 E-Mail: support(a)plutex.de Internet: http://www.plutex.de USt-IdNr.: DE 815030856 Handelsregister: Amtsgericht Bremen, HRB 25144 Geschäftsführer: Torben Belz, Hendrik Lilienthal

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BGP - draft-ietf-idr-bgp-optimal-route-reflection-19
by Philippe Duke 06 Nov '19

06 Nov '19

Hello, Does someone has an effort to implement draft-ietf-idr-bgp-optimal-route-reflection-19 for BGP? I see there is a difficulty in 4.1 in IGP metric. As far as I know, most of vendors are currently using IGP approach . How can I get IGP an abstract metric for peer address? I see the need to implement BGP-LS first before. It will allow separation of protocols and more. Having BGP-LS stub code would help in implementation of other features. What is your mind about it? Thanks --- Philip

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Please ignore - I need to test as I get no messages from this list
by Bernd Naumann 05 Nov '19

05 Nov '19

Sorry for the noise, but since weeks I got no new messages from this list, which was maybe related to the mentioned MTA GreyListing thingsy...

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Does the Bird support rfc3509 of OSPF? or any plan to support ?
by bbk bbk 04 Nov '19

04 Nov '19

hello, Does the Bird support rfc3509 of OSPF? Or any plan to support ?

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Reload bug in bird 2.0.6/2.0.7
by Nico Schottelius 02 Nov '19

02 Nov '19

Hello, when trying to reload a fully compatible/correct configuration file in bird 2.0.6 or 2.0.7, I get the following answer: bird> reload syntax error, unexpected END If I then just restart the whole daemon, there is no problem: router1:~# /etc/init.d/bird stop * Stopping bird ... [ ok ] router1:~# /etc/init.d/bird start * Starting bird ... [ ok ] router1:~# What's the best way of debugging this? Best, Nico p.s.: I have seen similar problems in bird1 before that reloading seems to parse the configuration "differently" than starting. -- Modern, affordable, Swiss Virtual Machines. Visit www.datacenterlight.ch

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Re: Is BIRD on BSD a second class citizen?
by k simon 01 Nov '19

01 Nov '19

Hello, FreeBSD does not support MPLS and VRF, but it support ECMP by recompile kernel with “options RADIX_MPATH”, and quagga/frr have supported it for few years . Not much of people use MPLS on freeware. BSDer always use multi routing tables which FB called FIB to replace VRF. It’s limited, but it’s usable to most people. For the past years, FB has refactored the routing subsystem aimed to reduce contentions on SMP systems, [1][2]. Linux is winner, but now FB can archive up to 10MPPS forward rate on one 8-core x86 server. It’s enough to many people, right ? And FB has an awesome feature called vimage/vnet, it’s similar to LXC on Linux with different implementation. We run serval bird/frr instance in different vnet jail on one host, and run serval on another host for hot backup or load sharing, each instance is independent with ~5% performance loss. Simon Ke 20191031 [1] https://wiki.freebsd.org/ProjectsRoutingProposal [2] https://wiki.freebsd.org/ProjectsRoutingProposal/API

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