On Jun 22, 2004, at 11:10 PM, Christopher J. Wolff wrote:
David,
Isn't renumbering an obligation?
I am not sure however RFC 2071 Touches on this subject in section 4.2.3 but is ambiguous as to the nature of when the renumber should take place. 4.2.3 Change of Internet Service Provider As mentioned previously in Section 2, it is increasingly becoming current practice for organizations to have their IP addresses allocated by their upstream ISP. Also, with the advent of Classless Inter Domain Routing (CIDR) [11], and the considerable growth in the size of the global Internet table, Internet Service Providers are becoming more and more reluctant to allow customers to continue using addresses which were allocated by the ISP, when the customer terminates service and moves to another ISP. [SNIP] For obvious reasons, this practice is highly discouraged by ISP's with CIDR blocks, and some ISP's are making this a contractual issue, so that customers understand that addresses allocated by the ISP are non-portable. [SNIP] It should also be noted that (contrary to opinions sometimes voiced) this form of renumbering is a technically necessary consequence of changing ISP's, rather than a commercial or political mandate. In my opinion, which counts for nothing in this case, I would hope that 12 months was enough time for the company to renumber. Unless this decision to terminate services with NAC was 'just made' I think that space from ARIN 12 months ago was a heads up that their non-portable space should be eliminated from their network. Just my $.02 with some RFCs tossed in, davidu ---------------------------------------------------- David A. Ulevitch - Founder, EveryDNS.Net http://david.ulevitch.com -- http://everydns.net ----------------------------------------------------