Hi, In RFC 3697, it says:
"A flow is a sequence of packets sent from a particular source to a particular unicast, anycast, or multicast destination that the source desires to label as a flow." It later says the usage of a flow: "The usage of the 3-tuple of the Flow Label and the Source and Destination Address fields enables efficient IPv6 flow classification, where only IPv6 main header fields in fixed positions are used." I am confused why we can't use a flow label to effectively identify a flow from a host behind a CPE in the AFTR. In what part this usage is against the specification? Thanks, Yiu
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