It has been bothering me for quite a while that we have no guidelines for the numbering of error codes, so they could be all over the map.  For example, I created codes in the NAS packages starting with 100, simply because this was the first example of package-documented error codes.  Since these codes were not yet registered with IANA, it may not be too late to enforce the following convention, following the precedent set by H.,248 Annex M.1:

Proposal: application-specific error codes are assigned consecutive values starting at 600.

Following on this proposal, I am changing the NAS error codes to 613-616 from 100-103.

Comments?

Tom Taylor
taylor@nortelnetworks.com
Ph. +1 613 736 0961 (ESN 396 1490)