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Published byChad Ambrose Wilkinson Modified over 9 years ago
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2/18/01 Hardware implications of Internet routing table growth Tony Li
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Questions Can hardware keep up with the growth of the routing table? If so, how much safety margin do we have? How else might things break?
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Current trends Recent trends show high growth Isolate this growth as a predictor of future growth Compare growth to Moore’s law
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Moore’s law Well known metric of hardware technological growth Hardware doubles every 18 months Includes clock rates, memory sizes Growth exceeding Moore’s law implies costs grow rapidly Good news: current growth under Moore’s law
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–Growth rate is ACCELERATING! –Hyperexponential growth Will eventually outgrow Moore’s law Moore’s law may fail Safety Margin? Current growth rate is about half of Moore’s law However:
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Recommendations Vendors –Continue to track Moore’s law Forwarding table Route processor DRAM Route processor performance
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Recommendations ISPs –Global prefix conservation Aggregation Limit policy exceptions –Track hardware upgrades –Deploy route reflectors –Upgrade processors before increasing exit points
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Recommendations Community –New routing architecture –Multihoming must not require global prefixes –Example: IPv6 plus EIDs –Start NOW!
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Conclusions Hyperexponential growth will exceed Moore’s law Safety margins are at risk Community needs to exercise TLC We need concerted effort on a new routing architecture
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