nanog mailing list archives
Re: estimation of number of DFZ IPv4 routes at peak in the future
From: William Herrin <bill () herrin us>
Date: Sat, 12 Mar 2011 08:00:10 -0500
On Sat, Mar 12, 2011 at 2:17 AM, Joel Jaeggli <joelja () bogus com> wrote:
I'm super-tired of the "but tcams are an expensive non-commodity part not subject to economies of scale". this has been repeated ad nauseam since the raws workshop if not before. You don't have to build a lookup engine around a tcam and in fact you can use less power doing so even though you need more silicon to achieve increased parallelism.
Hi Joel, You're either building a bunch of big TCAMs or a radix trie engine with sufficient parallelism to get the same aggregate lookup rate. If there's a materially different 3rd way to build a FIB, one that works at least as well, feel free to educate me. And while RIB churn doesn't grow in lockstep with table size, it does grow. Either way when you boost from 1M to 10M you're talking about engineering challenges with heat dissipation and operating challenges with power consumption, not to mention more transistors. I'll be convinced it can be done for less than 2x cost when someone actually does it for less than 2x cost. Whether it's 2x cost or 1.2x cost, the point remains the same: we could have routers today that handle the terminal size of the IPv4 table without breaking the bank. Your favorite router manufacturer has made vague assertions about how they would build one given sufficient customer demand. So make a demand. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside comĀ bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- estimation of number of DFZ IPv4 routes at peak in the future Mikael Abrahamsson (Mar 08)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Randy Bush (Mar 08)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Majdi S. Abbas (Mar 08)
- Re: estimation of number of DFZ IPv4 routes at peak in the future John Curran (Mar 09)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Justin Krejci (Mar 11)
- Re: estimation of number of DFZ IPv4 routes at peak in the future William Herrin (Mar 11)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Owen DeLong (Mar 11)
- Re: estimation of number of DFZ IPv4 routes at peak in the future William Herrin (Mar 11)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Joel Jaeggli (Mar 11)
- Re: estimation of number of DFZ IPv4 routes at peak in the future William Herrin (Mar 12)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Vadim Antonov (Mar 12)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Joel Jaeggli (Mar 12)
- Re: estimation of number of DFZ IPv4 routes at peak in the future William Herrin (Mar 12)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Jeff Wheeler (Mar 12)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Christopher Morrow (Mar 13)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Jeff Wheeler (Mar 13)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Christopher Morrow (Mar 13)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Jeff Wheeler (Mar 13)
- Re: estimation of number of DFZ IPv4 routes at peak in the future William Herrin (Mar 13)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Majdi S. Abbas (Mar 08)
- Re: estimation of number of DFZ IPv4 routes at peak in the future Randy Bush (Mar 08)