Have you read the Errata for RFC5952? I'm fairly certain it now says that the digits a-f must be uppercase, except where user derived, though I think this is a fairly recent correction.
Bran. -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Nick Hilliard Sent: 05 January 2011 18:32 To: Brandon Applegate Cc: cisco-nsp@puck.nether.net Subject: Re: [c-nsp] IOS - ipv6 uppercase in config - why ? On 05/01/2011 16:01, Brandon Applegate wrote: > Is there a reason that ipv6 addresses are stored with uppercase letters > in config ? yes. See rfc4291, section 2.2, where all of the examples are in upper case. These examples caused people to prefer upper case notation for ipv6 address representation, although there was actually nothing in the document which actually mandated the use of upper case. These recommendations have been updated in rfc5952, which requires (i.e. MUST) that all ipv6 addresses be represented in lower case. This document is standards track, so I guess Cisco is going to have to change at some stage. Given the current low levels of ipv6 deployment, sooner would be a lot less painful than later. Nick _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.872 / Virus Database: 271.1.1/3362 - Release Date: 01/05/11 19:34:00 _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/