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Filtering prefixes longer than /24
- Subject: Filtering prefixes longer than /24
- From: [email protected] (Michael Richardson)
- Date: Tue, 10 Jul 2001 14:06:04 -0400
- In-reply-to: Your message of "Tue, 10 Jul 2001 08:33:25 CDT." <[email protected]>
>>>>> "Matt" == Matt Crawford <[email protected]> writes:
>> - routing table in IPv6 will eat 4 times more memory than IPv4
>> if the # of entries is the same.
Matt> It shouldn't be more than 2 times, for the currently defined unicast
Matt> address formats. If you can be flexible on alignment, maybe even
Matt> closer to 1.5 times.
It shouldn't, but hardware people building CAM based table lookup engines
do not benefit from the left associative routing stuff, so it does take 4x
times.
2x times if the vendor is willing to compromise on dmakign /64s the longest
they will do in the fast path.
] ON HUMILITY: to err is human. To moo, bovine. | firewalls [
] Michael Richardson, Sandelman Software Works, Ottawa, ON |net architect[
] [email protected] http://www.sandelman.ottawa.on.ca/ |device driver[
] panic("Just another NetBSD/notebook using, kernel hacking, security guy"); [