Internet Assigned Numbers Authority • Domains • Protocols • Numbers • About UDP Speed Test Protocol (UDPSTP) Created 2025-09-26 Last Updated 2025-09-26 Note Values reserved for experimental use are not expected to be used on the Internet, but for experiments that are confined to closed environments. Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries Included Below • PDU Identifier • Protocol Version • Test Setup PDU Modifier Bitmap • Test Setup PDU Authentication Mode • Test Setup PDU Command Response Field • Test Activation PDU Command Request • Test Activation PDU Modifier Bitmap • Test Activation PDU Rate Adjustment Algo. • Test Activation PDU Command Response Field PDU Identifier Expert(s) Unassigned Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 0x0000 Reserved 0x0001-0x7F00 Specification Required 0x7F01-0x7FE0 Reserved for Experimental Use 0x7FE1-0x7FFF Reserved for Private Use 0x0001-0x7F00 Specification Required 0xFFFF Reserved Value Description Reference 0x0000 Reserved [RFC-ietf-ippm-capacity-protocol-25] 0x7F01-0x7FE0 Reserved for Experimental Use [RFC-ietf-ippm-capacity-protocol-25] 0x7FE1-0x7FFF Reserved for Private Use [RFC-ietf-ippm-capacity-protocol-25] 0xACE1 Test Setup PDU [RFC-ietf-ippm-capacity-protocol-25] 0xACE2 Test Activation PDU [RFC-ietf-ippm-capacity-protocol-25] 0xBEEF Load PDU [RFC-ietf-ippm-capacity-protocol-25] 0xDEAD Null PDU [RFC-ietf-ippm-capacity-protocol-25] 0xFEED Status Feedback PDU [RFC-ietf-ippm-capacity-protocol-25] 0xFFFF Reserved [RFC-ietf-ippm-capacity-protocol-25] Protocol Version Expert(s) Unassigned Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 0-19 Reserved 20-40960 IETF Review 40961-53248 Specification Required 53249-65534 Reserved for Experimental Use 65535 Reserved Value Reference 20 [RFC-ietf-ippm-capacity-protocol-25] Test Setup PDU Modifier Bitmap Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 00000000-01111111 IETF Review 10000000 Reserved Value Description Reference 0x00 No modifications [RFC-ietf-ippm-capacity-protocol-25] 0x01 Allow Jumbo datagram sizes above sending rates of 1 Gbps [RFC-ietf-ippm-capacity-protocol-25] 0x02 Use Traditional MTU (1500 bytes with IP-header) [RFC-ietf-ippm-capacity-protocol-25] Test Setup PDU Authentication Mode Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 0-59 IETF Review 60-63 Reserved for Experimental Use 64-255 Reserved Value Description Reference 0 Not used [RFC-ietf-ippm-capacity-protocol-25] 1 Required authentication for the Control phase [RFC-ietf-ippm-capacity-protocol-25] 2 Optional authentication for the Data phase, in addition to the Control phase [RFC-ietf-ippm-capacity-protocol-25] Test Setup PDU Command Response Field Expert(s) Unassigned Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 0-127 IETF Review 128-239 Specification Required 240-249 Reserved for Experimental Use 250-254 Reserved for Private Use 255 Reserved Value Description Reference 0 None (used by client in Request) [RFC-ietf-ippm-capacity-protocol-25] 1 Acknowledgment [RFC-ietf-ippm-capacity-protocol-25] 2 Bad Protocol Version [RFC-ietf-ippm-capacity-protocol-25] 3 Invalid Jumbo datagram option [RFC-ietf-ippm-capacity-protocol-25] 4 Unexpected Authentication in Setup Request [RFC-ietf-ippm-capacity-protocol-25] 5 Authentication missing in Setup Request [RFC-ietf-ippm-capacity-protocol-25] 6 Invalid authentication method [RFC-ietf-ippm-capacity-protocol-25] 7 Authentication failure [RFC-ietf-ippm-capacity-protocol-25] 8 Authentication time is invalid in Setup Request [RFC-ietf-ippm-capacity-protocol-25] 9 No Maximum test Bit rate specified [RFC-ietf-ippm-capacity-protocol-25] 10 Server Maximum Bit rate exceeded [RFC-ietf-ippm-capacity-protocol-25] 11 MTU option does not match server [RFC-ietf-ippm-capacity-protocol-25] 12 Multi-connection parameters rejected by server [RFC-ietf-ippm-capacity-protocol-25] 13 Connection allocation failure on server [RFC-ietf-ippm-capacity-protocol-25] 14-239 Unassigned 240-249 Reserved for Experimental Use [RFC-ietf-ippm-capacity-protocol-25] 250-254 Reserved for Private Use [RFC-ietf-ippm-capacity-protocol-25] 255 Reserved [RFC-ietf-ippm-capacity-protocol-25] Test Activation PDU Command Request Expert(s) Unassigned Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 0-127 IETF Review 128-239 Specification Required 240-249 Reserved for Experimental Use 250-254 Reserved for Private Use 255 Reserved Value Description Reference 0 No Request [RFC-ietf-ippm-capacity-protocol-25] 1 Request test in Upstream direction (client to server) [RFC-ietf-ippm-capacity-protocol-25] 2 Request test in Downstream direction (server to client) [RFC-ietf-ippm-capacity-protocol-25] 3-239 Unassigned 240-249 Reserved for Experimental Use [RFC-ietf-ippm-capacity-protocol-25] 250-254 Reserved for Private Use [RFC-ietf-ippm-capacity-protocol-25] 255 Reserved [RFC-ietf-ippm-capacity-protocol-25] Test Activation PDU Modifier Bitmap Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 00000000-01111111 IETF Review 10000000 Reserved Value Description Reference 0x00 No modifications [RFC-ietf-ippm-capacity-protocol-25] 0x01 Set when srIndexConf is start rate for search [RFC-ietf-ippm-capacity-protocol-25] 0x02 Set for randomized UDP payload [RFC-ietf-ippm-capacity-protocol-25] Test Activation PDU Rate Adjustment Algo. Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures A-Y IETF Review Z Reserved Value Description Reference A(n/a) Not used [RFC-ietf-ippm-capacity-protocol-25] B(0) Rate algorithm Type B [Y.1540Amd2] C(1) Rate algorithm Type C [TR-471] Test Activation PDU Command Response Field Expert(s) Unassigned Reference [RFC-ietf-ippm-capacity-protocol-25] Available Formats [IMG] CSV Range Registration Procedures 0-127 IETF Review 128-239 Specification Required 240-249 Reserved for Experimental Use 250-254 Reserved for Private Use 255 Reserved Value Description Reference 0 None (used by client in Request) [RFC-ietf-ippm-capacity-protocol-25] 1 Server Acknowledgment [RFC-ietf-ippm-capacity-protocol-25] 2 Server indicates an error [RFC-ietf-ippm-capacity-protocol-25] 3-239 Unassigned 240-249 Reserved for Experimental Use [RFC-ietf-ippm-capacity-protocol-25] 250-254 Reserved for Private Use [RFC-ietf-ippm-capacity-protocol-25] 255 Reserved [RFC-ietf-ippm-capacity-protocol-25] Licensing Terms