Dear Authors,
Kindly find following comments with respect to Path-Key draft. PathKey and Hop-Count Hop count is needed during the inter-domain best path computation when HOP LIMIT constraint is given. Using the ERO Object length one can easily find the hop-count. But if PCRep message has the 'Path Key Subobject' present in the PCEP ERO then there is no way to find the actual hop-count at PCE (1) because the actual hops are replaced with a path key. Suggestion: If path key exists in the ERO Object, it should be followed by TWO metric objects. The first metric object carries the metric value of the CPS .Metric type of this object is TE/IGP which was received in the path request. So in case of path key exists the second metric object carries Hopcount of the CPS. Metric type of this object is Type 3 - Hop Counts Error Handling In RP Object, if the path-key flag is set and there is no Path-key Object included in PCReq message, then the receiving PCEP Peer MUST trigger the Error message with Error Type 6 , Error Value 4 to set PATH-KEY object missing. Thanks & Regards, Dhruv Dhody Huawei Technologies India Pvt. Ltd, Bangalore, India **************************************************************************** *********** This e-mail and attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient's) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!
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