In Section 6.3:
"
M (Mandatory)
The 'M' Bit, known as the Mandatory bit, indicates whether
support of the AVP is required. If an AVP with the 'M' bit set
is received by the PaC or PAA and either the AVP or its value
is unrecognized, the message MUST be rejected and the receiver
MUST send a PANA-Notification-Request message with 'E' bit set.
If the AVP was unrecognized the result code of the PANA-
Notification-Request message with 'E' bit set MUST be
PANA_AVP_UNSUPPORTED. If the AVP value was unrecognized the
result code of the PANA-Notification-Request message with 'E'
bit set MUST be PANA_INVALID_AVP_DATA. In either case the
PANA-Notification-Request message with 'E' bit set MUST carry a
Failed-AVP AVP containing the offending mandatory AVP. AVPs
with the 'M' bit cleared are informational only and a receiver
that receives a message with such an AVP that is not
recognized, or whose value is not recognized, MAY simply ignore
the AVP.
"
To be consistent with Section 7.6, the penultimate sentence should be
changed to:
"
In either case the PANA-Notification-Request message with 'E' bit set
MUST carry a Failed-Message-Header AVP and MAY carry one or more
Failed AVPs.
"
Regards,
Yoshihiro Ohba
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