On Friday, April 19, 2002, at 04:00 , Liao Wei wrote: > Each IEEE standards give out PICS proforma for Protocol Implementation > Conformance Statement. The supplier of an implementation that is claimed > to conform to the standard should complete the PICS document and provide > the information necessary to identify the supplier and implementaion. > > Is there any this kind of document for RFCs. No. And my experience has been that PICS documents (from anyplace, not just IEEE) have not been a good indicator of whether the implementation really conformed/complied with the spec I was referencing. > If an internet device supplier claim their implementaion conform to > RFCXXXX. > What should subscriber do to verify the conformance. That is left entirely up to the customer. IETF does not specify any such conformance tests to run. When I've been a customer, I have invented my own tests for things I cared about and tested the equipment myself. Ran rja@extremenetworks.com