What reason could you possibly have to use non RFC 1918 space on a closed network? It's very bad practice - unfortunately I do see it done sometimes.... Paul -----Original Message----- From: Trey Darley [mailto:trey@kingfisherops.com] Sent: February 2, 2009 10:48 AM To: nanog@nanog.org Subject: Private use of non-RFC1918 IP space Hi, y'all - 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. I'd be very interested in corresponding off-list with anyone who's in a similar position. Cheers, --Trey ++---------------------------------------------------------------------- ------++ Kingfisher Operations Trey Darley - Principal ---------------------------------------------------------------------------- "The information transmitted is intended only for the person or entity to which it is addressed and contains confidential and/or privileged material. If you received this in error, please contact the sender immediately and then destroy this transmission, including all attachments, without copying, distributing or disclosing same. Thank you."