nanog mailing list archives
Re: Private use of non-RFC1918 IP space
From: Stephen Sprunk <stephen () sprunk org>
Date: Mon, 02 Feb 2009 14:28:33 -0600
Trey Darley wrote:
Some colleagues and I are running into a bit of a problem. We've been using RFC 1918 Class A space but due to the way subnets have been allocated we are pondering the use of public IP space. As the network in question is strictly closed I don't anticipate any problems with this as the addresses would be unambiguous within our environment. I'm curious if anyone else is doing this.
"Closed" networks nearly always end up getting connected to public networks, either by intent or by accident. If you act as if your network will remain "closed" forever, e.g. by using public addresses that are (or will be) assigned to someone else, you're going to cause a lot of headaches for yourself or your replacement down the road, eventually.
Contrary to popular belief, ARIN (and possibly other RIRs) _will_ assign public IPs for private/closed networks if you can explain why RFC1918 space will not suffice for your needs, e.g. because you are running a private internetwork between multiple companies and thus NAT/RFC1918 is simply not viable due to the number of ASes and the difficulty in avoiding collisions or the sheer number of hosts...
S -- Stephen Sprunk "God does not play dice." --Albert Einstein CCIE #3723 "God is an inveterate gambler, and He throws the K5SSS dice at every possible opportunity." --Stephen Hawking
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Current thread:
- Re: Private use of non-RFC1918 IP space, (continued)
- Re: Private use of non-RFC1918 IP space Måns Nilsson (Feb 04)
- Re: Private use of non-RFC1918 IP space Randy Bush (Feb 04)
- Re: Private use of non-RFC1918 IP space James R. Cutler (Feb 04)
- Re: Private use of non-RFC1918 IP space Ricky Beam (Feb 04)
- Re: Private use of non-RFC1918 IP space Owen DeLong (Feb 03)
- Re: Private use of non-RFC1918 IP space Nathan Ward (Feb 02)
- Re: Private use of non-RFC1918 IP space Adrian Chadd (Feb 02)
- Re: Private use of non-RFC1918 IP space Seth Mattinen (Feb 02)
- RE: Private use of non-RFC1918 IP space Michael Hallgren (Feb 02)
- Re: Private use of non-RFC1918 IP space Valdis . Kletnieks (Feb 02)
- Re: Private use of non-RFC1918 IP space Valdis . Kletnieks (Feb 02)