At 9:59 PM -0400 8/21/02, Alex von Thorn imposed structure on a stream of electrons, yielding: >At 10:11 AM -0400 8/21/02, Bill Cole wrote: >>At 9:45 AM -0400 8/21/02, Stefan Jeglinski imposed structure on a >>stream of electrons, yielding: >>>>According to the global routing table, the entire netblock >>>>63.216.0.0/13 is routed as a single route to CAIS as part of AS >>>>3491. >>> >>>Which bring me to this question: >>> >>>How/where does one sleuth "global routing tables?" I have always >>>tried to figure these things out by looking in the ARIN database >>>(or RIPE or APNIC), but I know there's got to be a more precise >>>way (?) >> >> >>1. If you are a truly multi-homed ISP and run BGP with a >>defaultless router somewhere, you have one view of the global >>routing table right there. >> >>2. If you understand a little BGP you might find the various >>'looking glass' sites such as http://nitrous.digex.net/ interesting >>and useful. >> >>3. If you are willing to deal with the routes as the ISP's are >>willing to register them (as opposed to how they happen to be >>announcing them in BGP this minute) you can do whois lookups of IP >>addresses against whois.radb.net and get back what the various >>ISP's have registered with the Routing Arbiter Database and its >>various successors and related systems. The RADB project is >>described at http://www.radb.net > > >RADB is not accurate as it is not supported by some large network >providers (and thus does not really reflect current reality). The IP >registries, ARIN, RIPE, and APNIC (and the smaller ones like KRNIC >that they delegate to) are authoritative.
For address ownership, yes. Unfortunately that doesn't always reflect the true relationships between companies. A lookingglass view reflects a current snapshot, but that can be as wrong as the stale data that exists in RADB. The IP registries don't have any power to enforce rules on routing, so you get some strange things happening at times, like a supposedly 'non-portable' SWIP'd block from one provider effectively being cut loose and showing up in routes elsewhere. RADB sometimes confirms that this is not a mistake, which might otherwise seem to be the case. And since Level3 started registering Sprint's route's for them (and some others) the RADB database has gotten more complete. -- Bill Cole [EMAIL PROTECTED] ############################################################# This message is sent to you because you are subscribed to the mailing list <[EMAIL PROTECTED]>. To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
