Date: Thu, 31 Jan 2002 08:16:48 -0800
From: "Michel Py" <[EMAIL PROTECTED]>
Message-ID:
<[EMAIL PROTECTED]>
| do we say:
|
| 1. It is ok to use a /64 for loopbacks and point to point links in the
| sake of simplicity.
|
| 2. It is a waste to use a /64 for a loopback or a point-to-point link
| and therefore we should subnet the IID.
|
| My vote goes to 1.
Given those two questions, so would mine. But those weren't the question,
which was more like
| 3. Is it ok to use longer than a /64 for links ?
That is, the suggestion isn't to pressure people to use /126 or something
(as your #2 would do), nor to tell people that it isn't OK to use a /64
for that purpose, which denying your #1 would do. But just to tell them that
it is OK to use a longer netmask if they want to (and in the appropriate
circumstances).
I'm going to ignore all the IPX analogies, I don't know enough about its
global hierarchically routed network to make any comments about how its
32 bits of network number are/were actually managed.
But:
| There is nothing that forbids subneting into the IID
Good. This is all I want to achieve. Just keep it possible. As long as
we don't start making it impossible, then all kinds of things remain as
options for the future (perhaps far future).
| (although it would be difficult to subnet smaller than /80),
I find it almost impossible to work out where /80 comes from (unless you
mean to find a need to do so, in which case, then yes, I'd find that
pretty difficult too, though I prefer more often to have constant 0 bits
in higher order positions than lower ones, so I'd tend to make the mask
longer, and put 0's in the subnet section rather than shorter with 0's
in the host part - but that's just aesthetics). But if there's something
supposedly magic about the last 48 bits (48 now is 100% irrelevant to
autoconf, so it cannot be that) it has escaped me.
| but don't you think that, in the time being,
| it would be wise to stick to /64 unless we have a hell of a
| good reason?
If you mean for numbering my own net, then no, I will explicitly use longer
masks than that wherever it makes sense, just to push the technology and make
sure that it remains possible.
For giving advice to the population at large, I'd probably suggest using /64
for almost all nets, to lower the chances of running into limits in the
technology that shouldn't be there (but bugs exist everywhere).
kre
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