"Payload Length" field to "Upper-Layer Packet Length". Also
clarified that, in the case of protocols that carry their own
length info (like non-jumbogram UDP), it is the upper-layer-
derived length, not the IP-layer-derived length, that is used in
00) Added section 8.4, specifying that upper-layer protocols, when
responding to a received packet that carried a Routing header,
must not include the reverse of the Routing header in the
response packet(s) unless the received Routing header was
00) Fixed some typos and grammatical errors.
00) Authors' contact info updated.
RFC 2460 IPv6 Specification December 1998
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