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In einer eMail vom 08.12.2007 09:35:06 Westeuropäische Normalzeit schreibt
rw@firstpr.com.au:
12 bytes is all we need for IPv4. 360 + 180 = 540 = 512 +28, i.e. a number that fits into 10 bits.
Hence 10 additional bits in the IPv4 header would enable scalable
IPv4-forwarding even if the internet were thousand times bigger and
denser.
Further side effects:
- 20 times faster next hop determination
- IPv4 address depletion becomes a non issue provided that the IRTF
seriously cared about
identifier/location split rather than kept going to sell the "EID/RLOC"-2
loose hops forwarding as a separation of identifier and location. Within the
same city there may live several Mr.Smith ! Each of whom
may also roam BTW ! But each would have a different social security card
number or passport number which is not affected in case of roaming ! The
currently discussed solutions just prove that the longly theoretical
loc/id discussion a year ago was just done to pave the ground
for LISP and just stopped all of a sudden.
IPv4 addresses could be just geopatch locally unique (therefore no problem
with IPv4 address depletion).
But agreed, roaming to some other geopatch must be enabled, too, i.e. must
not wind up in a situation where there are several IP-phones with the same
IPv4-address. Will say: identifier/location split is needed,
but is not provided and dealt with by the current LISP (agreed, I
haven't yet provided a solution to this problem (in case of roaming) either.But
why should I, if no one cared anyway).
Heiner
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