November 2022 - Bird-users

Re: [PATCH] Don't treat 0/8 and 240/4 specially in IPv4 classification
by Seth David Schoen 23 Nov '22

23 Nov '22

Daniel Suchy writes: > With respect to (for example) RFC 8212, such features should have > reverse logic - default behavior should be blocking that, but there > might be configuration option to change default prefix clasification > explicitly, if needed for any reason... > > In such cases, mind is changing. And it's more secure to have strict > defaults here... > > Your patch doesn't care about security here... > > For example - Junos has for these special cases different behavior ( > routing-options martians x.x.x.x/y allow ). Such way of handling of > special prefixes should be generally preffered... Yes, I've been following this a lot because I'm working on a project to attempt to unreserve these addresses, and we are trying to document how everyone handles them, in addition to making proposals and patches to stop treating them specially. It does seem like infrastructure-oriented routing implementations have often preferred to keep a default of blocking them with an option for individual sites to change that. Would it be appropriate to do this with a default bird.conf entry (perhaps also shipped by OS packages), or do some people write their configurations from scratch without referring to default/example configurations? In the latter case, would you prefer to see a new configuration directive like the Junos version?

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Support of the PREF64 option in RAdv protocol (RFC 8781)
by Tom Herbers 22 Nov '22

22 Nov '22

Hi, has anyone already looked into adding support for the PREF64 Option into the RAdv protocol? So far i haven't found any mention of that option in any context with BIRD. The purpose of the option is to inform clients which NAT64 Prefix they should use. It's proposed in RFC 8781 [1], but apparently not yet an official standard. Hoewer, there seems to be already some Client Support [2][3]. Best Regards, Tom Herbers [1] https://datatracker.ietf.org/doc/html/rfc8781 [2] https://blog.apnic.net/2022/11/21/deploying-ipv6-mostly-access-networks/ [3] https://nlnog.net/static/nlnogday2022/NLNOG_Ondrej.pdf

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How to submit a pull request?
by Seth David Schoen 17 Nov '22

17 Nov '22

Hi, I'd like to submit a pull request with a proposed change. I found that the nic.cz GitLab instance allows me to log in with my GitHub account (and further to create my own GitLab account there). When I do this, the GitLab software tells me that I can submit merge requests with a special per-user e-mail address, but this doesn't appear to work. Perhaps this is because my account isn't a member of the BIRD project, and only project members are permitted to do this? Is there a proper way for the public to propose changes via GitLab and that special e-mail address, or should patches be posted to this list, or submitted somewhere else? Thanks!

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Is BFD extractable from Bird?
by Nallan Chakravarthy, Sudarshan 15 Nov '22

15 Nov '22

Hello Bird Team, I’m Sudarshan, a software developer at NetApp. I have been using Bird as a peer for testing BGP functionality of NetApp’s Ontap software stack. Thanks to the Bird community! I looked at Bird’s BFD implementation. Was wondering if it is even plausible to extract only the BFD functionality out of Bird and use it with our existing BGP implementation. I see that BFD is tightly integrated with Bird’s core software libraries and so it doesn’t look like a trivial lift and shift. That said, I wanted to check with this group to see if there is a way to do it. Appreciate your response. Thanks, Sudarshan

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Can I turn my Linux machine into a router by installing The BIRD Internet Routing Daemon?
by Turritopsis Dohrnii Teo En Ming 15 Nov '22

15 Nov '22

Subject: Can I turn my Linux machine into a router by installing The BIRD Internet Routing Daemon? Good day from Singapore, Can I turn my Linux machine into a router by installing The BIRD Internet Routing Daemon? Can I use RHEL 9.0? Thank you. Regards, Mr. Turritopsis Dohrnii Teo En Ming Targeted Individual in Singapore Blogs: https://tdtemcerts.blogspot.com https://tdtemcerts.wordpress.com

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RE: Using BFD outside of Bird
by Sips, David 15 Nov '22

15 Nov '22

Hello, I wonder if anyone has explored using the BFD protocol code outside BIRD? What I want to do is to compile it with another routing engine. Does anyone think this is straightforward and does anyone have some tips on how to go about doing this? David Sips

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hardware recommandation for internet scale route-reflectors
by Nicolas Piatto 10 Nov '22

10 Nov '22

Hello, I'm looking for help on sizing hardware to use BIRD as route-reflectors. We have multiple routers with N x Transit providers (internet fullview v4/v6) and N x IXPs. We plan to replace our existing HW based on vendor routers to Software based routers. Obvious reason is performance/compute BGP updates on x86 boxes are supposed to be much better than limited router CPU/RAM. We want also to add some diversity in our RR setup, choice is not made yet but we plan to try routing VM from Cisco/Arista/Juniper vRR solution on one side and BIRD on the other side. 2 software providers means more work... but we suppose that if a bug is found on one side, the other one won't have it. Quick specs: - AF v4/v6 unicast, v4/v6 flowspec . - BGP add-path. - 50/100 peers, some are edge routers with internet scale, other are internal routers with only a limite subset of routes. - We want to implement BMP in a near future (does not seems avail in BIRD yet) I wonder if this would fit for BIRD router box, with some room for future growth in the DFZ. - CPU: Xeon gold 3,2GHz 8cores/16threads - RAM: 32 or 64gb How would BIRD behave with such HW specs ? is it overkill ? Thanks in advance for you help/comment Nico

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Re: Ibgp Problem
by Linux_Adm 09 Nov '22

09 Nov '22

Hi Kernel version is: Linux ks3353128 5.10.0-15-amd64 #1 SMP Debian 5.10.120-1 (2022-06-09) x86_64 GNU/Linux Bird Configuration: log syslog all; log "/var/log/bird.log" { debug, trace, info, remote, warning, error, auth, fatal, bug }; router id MYIP; debug protocols all; define my_asn = MYASN; protocol device { scan time 10; } protocol direct { disabled; # Disable by default ipv4; # Connect to default IPv4 table ipv6; # ... and to default IPv6 table } protocol kernel { ipv6 { export where source != RTS_STATIC; }; } protocol static { ipv6; # Again, IPv4 channel with default options } function is_martian_v6(){ return net ~ [ ::/96, ::/128, ::1/128, ::ffff:0.0.0.0/96+, ::224.0.0.0/100+, ::127.0.0.0/104+, ::0.0.0.0/104+, ::255.0.0.0/104+, 0000::/8+, 0200::/7+, 3ffe::/16+, 2001:db8::/32+, 2002:e000::/20+, 2002:7f00::/24+, 2002:0000::/24+, 2002:ff00::/24+, 2002:0a00::/24+, 2002:ac10::/28+, 2002:c0a8::/32+, fc00::/7+, fe80::/10+, fec0::/10+, ff00::/8+ ]; } protocol static my_routes { ipv6; route MYNETWORK/48 reject; } filter export_my_routes { if is_martian_v6() then reject; if proto = "my_routes" then { accept; } reject; } protocol bgp iBGP_INSTANCE { local LOCALIP as MYAS; neighbor NEIGIP as MYAS; keepalive time 5; graceful restart; ipv6 { next hop self; cost 50; import all; }; }

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Fixing make-obs script being broken
by İlteriş Yağıztegin Eroğlu 08 Nov '22

08 Nov '22

Heya, I have noticed that `tools/make-obs` is broken because of the "nounset" bash option being enabled while directly testing an environment variable ($RELEASE) that's optional/not set. I've included a simple patch to test the $RELEASE variable with bash parameter expansions, which will fix the script from not working. Cheers, ilteriş

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BGP keepalive not adjusted
by Serge G 08 Nov '22

08 Nov '22

Hi all, I faced an issue with BGP behavior in Bird 2.0.10. The issue is that if Bird has BGP keepalive timer configured, and the peer's hold timer is lower than Bird's one, then Bird doesn't change its keepalive timer. For example, Bird has keepalive/hold as 10/30, and peer has 1/4, then Bird will end up with 10/4, which makes BGP unusable. I didn't find anything related to this in documentation or mailing list. Could you please look into that?

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