exabgp VS freeRtr

I'm curious how ExaBGP works. In particular:

I don’t know of a specific Java implementation but https://github.com/Exa-Networks/exabgp might fit in ok. Use exa to talk bgp but write java applets to “do things” with what exa hands you.

> not to be tenable in Python

https://github.com/Exa-Networks/exabgp is written in python

"Those translation queries are answered by our authoritative name servers that occupy well known IP addresses themselves, which in turn are advertised to the rest of the internet via another protocol called the border gateway protocol (BGP)."

"To ensure reliable operation, our DNS servers disable those BGP advertisements if they themselves can not speak to our data centers, since this is an indication of an unhealthy network connection."

Correct me if I am wrong, but here "DNS servers" means the computers, not the software running on them, i.e., each computer is running both DNS server software and a BGP daemon.

For example, with a BGP daemon like ExaBGP the output of a DNS query can be checked and routes could be removed if the query fails.

https://github.com/Exa-Networks/exabgp

13 years ago I wrote a nice reference implementation for BGP "client" use - I just treated it as an API onto Cisco routers: https://github.com/BytemarkHosting/bgpfeeder is 1300 lines of Ruby, one file, no dependencies, and quite verbose.

At the time I was running a hosting company & wanted to feed updates to our IP lists from a web-based database into our routers (e.g. a customer wants a new IP to their servers, or moves their VPS images between physical hosts). But I couldn't understand how to get tight control of quagga, or the Ciscos and wondered how how to speak it directly?

It took about a week poring over the RFCs and the Net::BGP Perl module, but I can go back to it now for some useful revision. It brought a lot of disparate BGP knowledge together in one place, and re-expressed it in a language I still know. So if you know Ruby and are curious about BGP it might help you see what you can do with it.

Though if you want to use BGP to control your network devices today, you'd use https://github.com/Exa-Networks/exabgp instead. It can pull every trick you could possibly want with BGP - e.g. DDoS mitigation, anycast, and generally letting you mess with BGP via JSON. There are lots of extensions to BGP, and I only cared about the ones to send v4 & v6 routes around. Also I only wanted to write it all in one file :)

this is the backplane and the linecard chip guys.... plus the info that i know pretty well how to replace the ms azure sonic rp container to anything, including www.freertr.org with a simple libmnl exporter... bruhhh.... cant stand waiting this arrives to ebay then to my flat to route my packets.... xDDDDDDDDDDDDDDDD

code at https://github.com/rare-freertr/freeRtr

place on the web: http://www.freertr.org/ license: http://creativecommons.org/licenses/by-sa/4.0/ quote-3: true random comes from weather forecasts and political announcements quote-2: stupid question deserves stupid answers quote-1: use your brain quote0: know your shit quote1: do or not to do but don't try quote2: music heals quote3: ignorance kills quote4: make the world better quote5: if a machine can learn the value of human life, maybe we can too quote6: let bloom all the flowers quote7: keep it stupid simple quote8: be liberal in what you accept, and conservative in what you send quote9: the beer-ware license for selected group of people: cs@nop wrote these files. as long as you retain this notice you can do whatever you want with this stuff. if we meet some day, and you think this stuff is worth it, you can buy me a beer in return

Note: freertr.org seems to be a http only site. Since your link doesn't specify it defaults to https which doesn't work (at least for me). So for the benefit of others here are working links: http://www.freertr.org, http://www.freertr.org/online.html.

frr's ldp was broken for 3 years and they managed to recover 10 months ago: https://github.com/rare-freertr/freeRtr/blame/master/cfg/intop8-ldp01.tst

openwrt have pretty well vrf, mpls vpns (layer2 and layer2, that is, vpls, evpn, layer3mpls-vpn, etc) and everything fancy like this with this small package: https://github.com/rare-freertr/freeRtr/tree/master/misc/openwrt-p4xdp