OK, I see now that down the road using a 1 and 100 net address on the lab would create unmanageable problems if those nets were ever put into use on the internet... something NAT couldnt fix. And the responses saying use 1918 space point out the potential problems were this lab ever to leak out an advertisement on to the internet, etc.... all advice I appreciate people have taken the time to offer. But not to be a pest but what are the odds the IANA would ever allocate the 1 and 100 nets to someone? Is this an unpredictable matter or is there a schedule of what's next somewhere? Or which is more likely, the world adopts IP v6 or the 1 and 100 nets are deployed on the internet? :-) It is apparent that I really want to use these address ranges but I do need to grapple with the possibility that this lab will need internet connectivity at some point. -----Original Message----- From: Murphy, Brennan Sent: Friday, May 30, 2003 8:49 AM To: nanog@merit.edu Subject: RE: IANA reserved Address Space 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: bmanning@karoshi.com [mailto:bmanning@karoshi.com] Sent: Friday, May 30, 2003 8:08 AM To: Murphy, Brennan Cc: nanog@merit.edu 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
Given that unallocated class A address space represents one of the biggest chunks of remaining address space fairly likely... you'll notice that 60/8 was assigned in april 03 to apnic, lacnic was assigned 2 /8s in the last year and so forth... On Fri, 30 May 2003 Brennan_Murphy@NAI.com wrote:
But not to be a pest but what are the odds the IANA would ever allocate the 1 and 100 nets to someone? Is this an unpredictable matter or is there a schedule of what's next somewhere? Or which is more likely, the world adopts IP v6 or the 1 and 100 nets are deployed on the internet? :-) It is apparent that I really want to use these address ranges but I do need to grapple with the possibility that this lab will need internet connectivity at some point.
-----Original Message----- From: Murphy, Brennan Sent: Friday, May 30, 2003 8:49 AM To: nanog@merit.edu Subject: RE: IANA reserved Address Space
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: bmanning@karoshi.com [mailto:bmanning@karoshi.com] Sent: Friday, May 30, 2003 8:08 AM To: Murphy, Brennan Cc: nanog@merit.edu 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
-- -------------------------------------------------------------------------- Joel Jaeggli Academic User Services joelja@darkwing.uoregon.edu -- PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E -- In Dr. Johnson's famous dictionary patriotism is defined as the last resort of the scoundrel. With all due respect to an enlightened but inferior lexicographer I beg to submit that it is the first. -- Ambrose Bierce, "The Devil's Dictionary"
But not to be a pest but what are the odds the IANA would ever allocate the 1 and 100 nets to someone?
99%
I can't imagine 100.0.0.0/8 remaining reserved - there's nothing particularly special about it (100=0x64... a number which represented in hex has digits which form a power of two in decimal, looks nice but isn't a special bit boundary or anything). 1.0.0.0/8, well, IMO some chance it may remain reserved for quite a while. But there's always a chance it could be allocated any day. As another example, I'd be sure 200.200.200.200 will end up with someone someday, and I've seen horrible attrocities committed with that IP by people who don't own it (eg. used as a content destination IP via satellite that a number of providers then had machines with that IP receiving UDP), just because they think it looks nice. 1.0.0.0/8 was used by One.Net (an Australian ISP/Telco, who later collapsed rather dramatically) for their router/link IP addresses. It was disgusting enough that many wouldn't peer with them. I don't know what isn't clear about using the allocated network for internal addresses: 10.0.0.0/16 10.10.0.0/16 10.20.0.0/16 etc Nice, clear, obviously differentiated blocks. 10.0.0.0/8 is BIG. You're unlikely to need more than 254 devices on any subnet in a lab anyway, so you can split down to /24's (or smaller in these enlightened times of CIDR, but I'm guessing that doesn't look nice to you). If you can't find enough nice IP addresses in it to build your lab, well, that's a really big lab. David.
participants (4)
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Brennan_Murphy＠NAI.com -
David Luyer -
Joel Jaeggli -
Randy Bush