In einer eMail vom 28.11.2007 20:00:04 Westeuropäische Normalzeit schreibt
tli@cisco.com:
I can
vouch that routers are incredibly fast at doing longest-match
lookups because folks have put in incredible amounts of work into
the
ASICs. Yes, of course, it could be much, much worse, but
doing
longest-match can in no way be construed as 'simple' to
implement in
hardware.
That said, if we want to make
forwarding plane changes (and all of
the proposals that I've seen
involve some changes somewhere ;-),
making those changes in the
ASICs is not unreasonable.
Tony
A single matrix lookup for any destination which is still in a different
geo-patch can also be done by ASIC.
Can anybody tell the difference in time compared with prefix lookup by
ASICs ?
Heiner
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