North American Network Operators Group
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RE: IANA reserved Address Space

  • From: Owen DeLong
  • Date: Fri May 30 10:29:16 2003 
If your net 1 and your net 100 talk to each other in your lab, what sort
of NAT plan would allow your net 1 to distinguish between your net 100
and the real net 100?

Really... There are three different zones of RFC-1918 space, so your routing
tables should still be pretty easy to visually parse.

Owen


--On Friday, May 30, 2003 5:49 AM -0700 [email protected] wrote:


Others have pointed out that I should stick to
RFC 1918 address space. But again, this is a
lab network and to use the words of another,
one of the things I want to do is make it much
easier to "parse visually" my route tables.
Think of it as a "metric system" type of numbering
plan.  The 1 and 100 nets would not be advertised
via BGP obviously...not a hijack situation at all.

If I take into account the possibility that this
lab will have later requirements to connect to
the internet, all I have to do is have a NAT plan
in place...one that even takes into account that
the 1 and 100 nets could become available some
day, correct?

Thanks to those who have responded so far.

-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Friday, May 30, 2003 8:08 AM
To: Murphy, Brennan
Cc: [email protected]
Subject: Re: IANA reserved Address Space



networks 1 and 100 are reserved for future delegation.
network 10 is delegated for private networks, such as your
lab.

if you use networks 1 and 100, you are hijacking these
numbers.

that said, as long as your lab is never going to connect
to the Internet,  you may want to consider using the following
prefixes:

4.0.0.0/8
38.0.0.0/8
127.0.0.0/8
192.0.0.0/8




I'm tasked with coming up with an IP plan for an very large lab
network. I want to maximize route table manageability and
router/firewall log readability. I was thinking of building this lab
with the following address space:

1.0.0.0 /8
10.0.0.0 /8
100.0.0.0 /8

I need 3 distinct zones which is why I wanted to separate them out. In



any case, I was wondering about the status of the 1 /8 and the 100 /8
networks. What does it mean that they are IANA reserved? Reserved for
what? http://www.iana.org/assignments/ipv4-address-space

Anyone else ever use IANA reserved address spacing for
lab networks? Is there anything special I need to know?
I'm under the impression that as long as I stay away
from special use address space, I've got no worries.
http://www.rfc-editor.org/rfc/rfc3330.txt

Thanks,
BM