Yo Christian! Actually, RFC 3168 has nothing to do with it. The issue is RFC 793. RFC 793 is a "Standard", not a "Proposed Standard" RFC 793 lists the bits later used by ECN as "Reserved". Computer programs are supposed to ignore "Reserved" bits unless they really know what they are doing. If a router treats bits in the header as required by the STANDARD RFC 793 then RFC 3168 will cause no harm. I do not have a copy of Baker handy, but I bet it agrees. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701 gem@rellim.com Tel:+1(541)382-8588 Fax: +1(541)382-8676 On Tue, 23 Jul 2002, Christian Huitema wrote: > So, if you are on a campaign to promote ECN, then maybe you should first > try to promote this specification to the next standard level... You may > also want to take a stab at revising the "Requirements for IP Version 4 > Routers"; the last edition, RFC 1812 by Fred Baker, dates from June > 1995.