2009-07-30 2011-01-20 IESG Approval 0 Used for GIST messages not related to any signalling application. 1-32 QoS NSLP Aggregation Levels 0-31 33 NATFW 34-32703 Unassigned 32704-32767 Reserved for Private/Experimental Use 32768-65535 Reserved Martin Stiemerling 0-31 IETF Review 32-55 Expert Review 0 Query 1 Response 2 Confirm 3 Data 4 Error 5 MA-Hello 6-55 Unassigned 56-63 Reserved for Private/Experimental Use 64-127 Reserved Martin Stiemerling 0-1023 IETF Review 1024-1999 Specification Required 0 Message Routing Information 1 Session ID 2 Network Layer Information 3 Stack Proposal 4 Stack Configuration Data 5 Query-Cookie 6 Responder-Cookie 7 NAT Traversal 8 NSLP Data 9 Error 10 Hello ID 11-1999 Unassigned 2000-2047 Reserved for Private/Experimental Use 2048-4095 Reserved Martin Stiemerling 0-63 IETF Review 64-119 Specification Required 0 Path-Coupled MRM 1 Loose-End MRM 2-119 Unassigned 120-127 Reserved for Private/Experimental Use 128-255 Reserved Martin Stiemerling 0-63 IETF Review 64-119 Expert Review 0 Reserved 1 TCP opened in the forwards direction 2 TLS initiated in the forwards direction 3 SCTP opened in the forwards direction 4 DTLS initiated in the forwards direction 5-119 Unassigned 120-127 Reserved for Private/Experimental Use 128-255 Reserved First Come First Served 1 Common Header Parse Error Protocol-Error For subcode 3 only, Message Length Info carries the calculated message length. 2 Hop Limit Exceeded Permanent-Failure 3 Incorrect Encapsulation Protocol-Error 4 Incorrectly Delivered Message Protocol-Error 5 No Routing State Protocol-Error 6 Unknown NSLPID Permanent-Failure 7 Endpoint Found Permanent-Failure 8 Message Too Large Permanent-Failure MTU Info 9 Object Type Error Protocol-Error Object Type Info 10 Object Value Error Protocol-Error 1 or 2 Object Value Info fields; see appendix A.4.4.10 11 Invalid IP-Layer TTL Permanent-Failure 12 MRI Validation Failure Permanent-Failure Object Value Info First Come First Served 0 Unknown Version 1 Unknown Type 2 Invalid R-flag 3 Incorrect Message Length 4 Invalid E-flag 5 Invalid C-flag First Come First Served 0 Duplicate Object 1 Unrecognized Object 2 Missing Object 3 Invalid Object Type 4 Untranslated Object 5 Invalid Extensibility Flags First Come First Served 0 Incorrect Length 1 Value Not Supported 2 Invalid Flag-Field Combination 3 Empty List 4 Invalid Cookie 5 Stack-Proposal First Come First Served 0 MRI Too Wild 1 IP Version Mismatch 2 Ingress Filter Failure First Come First Served 1 Message Length Info 2 MTU Info 3 Object Type Info 4 Object Value Info