IPv4 Hash Function

Richard Steenbergen ras at above.net
Thu Nov 11 08:36:38 UTC 1999

I have seen the IPv4 hash function:

(ip ^ (ip >> 23) ^ (ip >> 17)) & ~(bucketsize - 1)

for power-of-2 sized hash tables attributed to Van Jacobson, in many
places, but I have never found any paper or writing that is the actual
source of this. Does anyone know where I might find such? Personal
curiosity only.

Richard A Steenbergen <ras at above.net>   http://users.quadrunner.com/humble
PGP Key ID: 0x60AB0AD1  (E5 35 10 1D DE 7D 8C A7  09 1C 80 8B AF B9 77 BB)
AboveNet Communications - AboveSecure Network Security Engineer, Vienna VA

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