2003-04-16 2014-04-08 IETF Review 0 Reserved 1 CHAP 2 SRP 3 KRB5 4 SPKM1 (OBSOLETE) 5 SPKM2 (OBSOLETE) 6-255 Reserved (Not assigned by IANA) 256-65535 Unassigned IETF Review 0 Reserved 1 CRC32c 2-255 Reserved (Not assigned by IANA) 256-65535 Unassigned Unassigned Specification Required When a MODP group is used with SRP, the generator (g) value differs from the usual generator of 2. Consult the appropriate reference for the correct generator to use. SRP-768 768 bit SRP group SRP-1024 1024 bit SRP group SRP-1280 1280 bit SRP group SRP-1536 1536 bit SRP group SRP-2048 2048 bit SRP group MODP-3072 3072 bit MODP group MODP-4096 4096 bit MODP group MODP-6144 6144 bit MODP group MODP-8192 8192 bit MODP group Unassigned Standards Action to define the semantics of the opcode; Expert Review to select the specific opcode(s) Namespace details: Numerical values that can fit in one octet with most significant two bits (bits 0 and 1) already designated by , bit 0 being reserved and bit 1 for immediate delivery. Bit 2 is designated to identify the originator of the opcode. Bit 2 = 0 for initiator and Bit 2 = 1 for target. Reserved to IANA: 0x07-0x0f, 0x13-0x1b (initiator codes) 0x27-0x2f, 0x33-0x3b (target codes) Reserved to IANA for allocation only if no opcode pair is available: 0x11, 0x12, 0x1f (initiator codes) 0x30 (target codes) 0x00 Initiator NOP-Out 0x01 Initiator SCSI Command 0x02 Initiator SCSI Task Management Function Request 0x03 Initiator Login Request 0x04 Initiator Text Request 0x05 Initiator SCSI Data-Out 0x06 Initiator Logout Request 0x10 Initiator SNACK Request 0x1c-0x1e Initiator Vendor-specific codes 0x20 Target NOP-In 0x21 Target SCSI Response 0x22 Target SCSI Task Management Function Response 0x23 Target Login Response 0x24 Target Text Response 0x25 Target SCSI Data-In 0x26 Target Logout Response 0x31 Target Ready To Transfer (R2T) 0x32 Target Asynchronous Message 0x3c-0x3e Target Vendor-specific codes 0x3f Target Reject IETF Review AuthMethod DataDigest DataPDUInOrder DataSequenceInOrder DefaultTime2Retain DefaultTime2Wait ErrorRecoveryLevel FirstBurstLength HeaderDigest ImmediateData InitialR2T InitiatorAlias InitiatorName InitiatorRecvDataSegmentLength iSCSIProtocolLevel iSERHelloRequired MaxAHSLength MaxBurstLength MaxConnections MaxOutstandingR2T MaxOutstandingUnexpectedPDUs MaxRecvDataSegmentLength RDMAExtensions SendTargets SessionType TaggedBufferForSolicitedDataOnly TargetAddress TargetAlias TargetName TargetPortalGroupTag TargetRecvDataSegmentLength TaskReporting X#NodeArchitecture Standards Action 0 SCSI Async Event 1 Logout Request 2 Connection drop notification 3 Session drop notification 4 Negotiation Request 5 Task termination 6-247 Unassigned 248-254 Vendor-unique 255 Vendor-unique Standards Action 1 ABORT TASK 2 ABORT TASK SET 3 CLEAR ACA 4 CLEAR TASK SET 5 LOGICAL UNIT RESET 6 TARGET WARM RESET 7 TARGET COLD RESET 8 TASK REASSIGN 9 QUERY TASK 10 QUERY TASK SET 11 I_T NEXUS RESET 12 QUERY ASYNCHRONOUS EVENT 13-127 Unassigned Standards Action 0x00 Success 0x01 Redirection 0x02 Initiator Error 0x03 Target Error 0x04-0x0e Unassigned 0x0f Vendor-Unique 0x10-0xff Unassigned Standards Action 0x00 0x00 Success 0x00 0x01-0xff Unassigned Standards Action 0x01 0x01 Target moved temporarily 0x01 0x02 Target moved permanently 0x01 0x03-0xff Unassigned Standards Action 0x02 0x00 Initiator error 0x02 0x01 Authentication failure 0x02 0x02 Authorization failure 0x02 0x03 Not found 0x02 0x04 Target removed 0x02 0x05 Unsupported version 0x02 0x06 Too many connections 0x02 0x07 Missing parameter 0x02 0x08 Can't include in session 0x02 0x09 Session type not supported 0x02 0x0a Session does not exist 0x02 0x0b Invalid during login 0x02 0x0c-0xff Unassigned Standards Action 0x03 0x00 Target error 0x03 0x01 Service unavailable 0x03 0x02 Out of resources 0x03 0x03-0xff Unassigned Standards Action 0x01 Reserved 0x02 Data digest error 0x03 SNACK Reject 0x04 Protocol Error 0x05 Command not supported 0x06 Immediate command reject 0x07 Task in progress 0x08 Invalid data ack 0x09 Invalid PDU field 0x0a Long op reject 0x0b "Deprecated reason code" 0x0c Waiting for Logout 0x0d-0xff Unassigned Standards Action 0x1 iSCSI control-type PDU 0x2 iSER Hello Message 0x3 iSER HelloReply Message 0x4-0xf Unassigned Expert Review and Standards Action Unassigned 0 No version claimed 1 RFC7143 2 RFC7144 3-31 Unassigned Standards Action 0 Function complete 1 Task does not exist 2 LUN does not exist 3 Task still allegiant 4 Task allegiance reassignment not supported 5 Task management function not supported 6 Function authorization failed 7 Function succeeded 8-254 Unassigned 255 Function rejected