2010/1/12 Łukasz Bromirski <lukasz@bromirski.net>:
On 2010-01-12 21:27, Ben Jencks wrote:
This is obviously a rookie question, but I haven't found anything by searching. I'm looking to set up a small testbed to simulate our internal network topology, and I want to have a realistic BGP table from the fake "upstream" routers. Ideally what I'd like to do is dump the BGP table from our production routers, strip the immediate neighbor AS, and load the table into Quagga or OpenBGPD to advertise. I'm running into two problems: how do you dump BGP tables in a machine-parseable format from IOS, and how do you make the route server advertise the routes as they were in the original table, including the full AS-path, communities, etc? If Quagga/OpenBGPD aren't the right tools, I'm happy to use something else.
Use libbgpdump from ris.ripe.net to get raw data from http://data.ris.ripe.net/ (you're looking for newest bview file), and dump them using bgpdump to something easily to parse. Then using bgpsimple (from googlecode) simulate a peer with specific number of prefixes advertised - up to the limit of the contents of the file. You can spoof next-hop, AS, etc. As for the attribute manipulation, fire up a couple of VMWare/VirtualBox/vimage instances with quagga/openbgpd to accept the prefixes from bgpsimple and mangle them in some manner.
Thanks everyone. bgpsimple ended up being the tool I wanted, and I just used the RIPE data. If I was more adventurous I would have hooked Quagga up with a BGP session to the production routers and generated my own dumps, but the RIPE data was good enough for now. -Ben