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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Framing UpdateThe issue that necessitated removing the iSCSI Framing Requirements agenda item from Tuesday's agenda has been resolved. I'm sorry that removing the agenda item was necessary, but would ask for some understanding that AD and WG chair work overload were significant contributing factors to this. In the tsvwg meeting on Tuesday, it was announced that the TCP ULP framing draft (draft-ietf-tsvwg-tcp-ulp-frame-01.txt) will be advanced to become an Experimental RFC. My understanding is that a combination of technical concerns raised in tsvwg-related discussions and the observation of the difficulty that the ips WG has had in determining the appropriate level of requirement for this mechanism contributed to a conclusion that an Experimental RFC is appropriate at this time. This is not the last word ... FWIW, Explicit Congestion Notification (ECN) started out as an Experimental RFC and has recently been updated and reissued as a Proposed Standard RFC. Since normative references to Experimental RFCs are not permitted in standards-track documents, the strongest requirement that iSCSI may use for TCP ULP framing is "MAY" (MAY implement, MAY use) - "SHOULD" and "MUST" cannot be used. I am also going to exercise my prerogative as WG chair in the area of framing mechanisms that are independent of the TCP implementation to announce that at most one such mechanism will be permitted to be specified for use with iSCSI. This means that when the details for the word-stuffing version of constant overhead byte stuffing are worked out and made available, the WG will be faced with two issues: (1) Which mechanism is to be specified (markers or word-stuffing)? I don't believe that WG rough consensus can be obtained for not specifying any mechanism in this space. (2) What level of requirements (MUST/SHOULD/MAY) to impose on implementation and use of that mechanism. As I said in Salt Lake City, I do not intend to allow these issues to remain open beyond the February interim meeting. Thanks, --David --------------------------------------------------- David L. Black, Senior Technologist EMC Corporation, 42 South St., Hopkinton, MA 01748 +1 (508) 435-1000 FAX: +1 (508) 497-8500 black_david@emc.com Mobile: +1 (978) 394-7754 ---------------------------------------------------
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