North American Network Operators Group|
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Routing wars pending?
I would like to bring up the matter of address ownership. Here is the story: ILAN acts as registry of last resort in Israel. It owns and assigns IP addresses in the 192.114-118.0.0 address range. These 5 blocks are owned by ILAN (AS378). Over the years, many IP addresses have been assigned - in the past to individual companies and more lately CIDR blocks to local ISPs. ILAN takes a ›50 one time fee to register the IP address for the requestor. Company FOO which has a class C decides to leave their current ISP - D. They move to ISP - N - which has their own CIDR block and does the good thing - forces the company to renumber and then informs ILAN that the company has relinquished the old class C. This allows me to reclaim IP addresses and form blocks of /22 and /21 which previously could not be done. All good up to this point. ISP D says since they paid the ›50 registration fee - they now own the class C forever. I tell them that that is not the case and that the address was registered in the name of the company and not in the name of the ISP. They reassign the class C to other customers - at the same time I have reassigned the reallocated class C to some one else. Their upstream service provider - U - says to D: "Please inform me to delete the networks below from your access-list per Ilan request. It is a policy of U to only delete networks per U's customer request and not anyone else. This issues needs to resolved by you and ILAN and once it has been resolved, please let me what networks to delete." Ok so far. I trust D and ILAN will resolve this peacefully. But what about cases where it cannot be resolved peacfully? The routing tables are gonna start growing. ILAN withdrew 190 routes on August 1st when it started announcing 184.108.40.206/16 and 220.127.116.11/16. Now, since D is announcing a more specific (/24) - it turns out that his route supercedes my larger aggregate. How to combat it? I would have to start reannouncing all my specifics so as to counter-override his /24. What were to happen if this ISP picked a chunk of unused IP address space in my blocks, and started advertising it as /24s? His upstream service provider - U - just accepts it and starts routing. We maintain the authoritative source for IP address ownership in whois.ripe.net. We found that the upstream service provider - U - went and added a route object in whois.ra.net for the /24s (there are 2 cases now) - basely solely on the word of ISP D. So now there is a contradiction between the two databases. Now if D were to start advertising many unallocated /24s, I would be in a big problem and have to restart announcing my specifics. What are people doing in this area today? Are we going to start seeing routing wars? Thanks, Hank Nussbacher Israel