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Re: ISP customer assignments
- From: Chris Adams
- Date: Tue Oct 13 19:26:27 2009
Once upon a time, Michael Dillon <wavetossed@googlemail.com> said:
> > How many addresses do you like on point-to-point circuits?
>
> That will become one of those great interview questions, because anyone who says
> something like "a /127" or "a /64" will be someone that you probably
> don't want to hire.
>
> The right answer is to explain that there are some issues surrounding
> the choice of
> addressing on point-to-point circuits and there has even been an RFC
> published discussing
> these issues, RFC 3627 <http://www.ietf.org/rfc/rfc3627.txt>
Still learning here, so please go easy...
I read the above, and I see section 4 item 3 says:
The author feels that if /64 cannot be used, /112, reserving the last
16 bits for node identifiers, has probably the least amount of
drawbacks (also see section 3).
I guess I'm missing something; what in section 3 is this referring to?
I can understand /64 or /126 (or maybe /124 if you were going to
delegate reverse DNS?), but why /112 and "16 bits for node identifiers"
on a point-to-point link?
--
Chris Adams <cmadams@hiwaay.net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.
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