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Re: RFC: new network config



jgg@ualberta.ca (Jason Gunthorpe)  wrote on 05.02.99 in <Pine.LNX.3.96.990205141641.11740B-100000@wakko>:

> Erm, but : is a standard for ports! Like
>
> http://foo.bar:80/

In URIs, yes. (Or would the right TLA be URN here?)

> If someone decides to use :'s for IPv6 address seperation then all sorts
> of nasty stuff breaks.

There was something about using IPv6 addresses in URIs, but I don't  
remember the result.

Anyway, IPv6 addresses can have the following forms:

1234:5678:90ab:cdef:0123:4567:89ab:cdef
1111:2222:3333:0000:0000:4444:5555:6666
1111:2222:3333::4444:5555:6666  (same as before)
0000:0000:0000:0000:0000:0000:0000:0001 (IPv6 version of 127.0.0.1)
0:0:0:0:0:0:0:1 (same as before)
::1 (same as before)
0:0:0:0:0:0:0:0 (IPv6 version of 0.0.0.0)
::0 (same as before)
:: (same as before)
1234:5678:abcd:ef00:0000:0000:0000:0000/56 (a network)
1234:5678:abcd:ef00::/56 (same as before) (note last zeroes in word stay)
0000:0000:0000:0000:0000:0000:1.2.3.4 (IPv4-compatible IPv6 addresses)
::1.2.3.4 (same as before)
0000:0000:0000:0000:0000:FFFF:1.2.3.4 (IPv4-mapped IPv6 addresses)
::FFFF:1.2.3.4 (same as before)

Oh, and the lower 64 bits will *usually* be derived from your ethernet  
card's MAC address, so it won't be a nice address anyway. IPv6 is  
*heavily* into autoconfiguration, automatic renumbering, and so on.

All "normal" worldwide IPv6 addresses are supposed to be between 4000::  
(inclusive) and 6000:: (exclusive).

Broadcast, multicast, and stuff, is ffff:<something>.

See RFC 1884 for more details.


MfG Kai


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