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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: a radical proposal (Re: protocols that don't meet the need...)
AO> Date: Wed, 15 Feb 2006 21:41:53 +0100 AO> From: Andre Oppermann AO> Err, the problem is not the number of AS numbers (other than having to AO> move to 32bit ones). The 'problem' is the number of prefixes in the It's both. AO> routing system. The control plane scales rather well and directly AO> benefits from Moore's law. With todays CPU's there is no problem AO> handling 2 million routes and AS numbers. Absolutely not. For some equipment. However, I encounter a number of 7200s still in service. AO> Things get a bit more hairy with the forwarding plane though. The AO> faster the link speed the less time it has per lookup and the larger AO> the routing table the more routes it has to search in that ever shrinking AO> amount of time. Yes. AO> You see, saving on AS numbers is not really going to help much where it AO> matters. It's also saving on route count. In my example, Cox and SBC partner up and share an ASN and a netblock. That's _one_ global route for a ton of dual-homed leaves. AO> IMHO, and I have stated this before, the best way to handle the route AO> issue is to hand out IPv6 /32 for multihoming and make it the routeable Agree. AO> entity. Perfect matches in hardware are pretty easy to do for large AO> numbers of them compared to longest match. On the plus side perfect AO> match scales much better too and can be done in parallel or distributed AO> within a routing chip. Doing the same for longest-match requires a lot AO> more effort. With perfect-match having 2 million routes is not much of AO> a problem too. All true. But can we wait for all the forklifts? Eddy -- Everquick Internet - http://www.everquick.net/ A division of Brotsman & Dreger, Inc. - http://www.brotsman.com/ Bandwidth, consulting, e-commerce, hosting, and network building Phone: +1 785 865 5885 Lawrence and [inter]national Phone: +1 316 794 8922 Wichita ________________________________________________________________________ DO NOT send mail to the following addresses: [email protected] -*- [email protected] -*- [email protected] Sending mail to spambait addresses is a great way to get blocked. Ditto for broken OOO autoresponders and foolish AV software backscatter.
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