2017-04-03 2026-02-02 3-65519 Specification Required 65520-65534 Private Use Rick Taylor 0 Reserved 1 Peer Discovery Signal 2 Peer Offer Signal 3-65519 Unassigned 65520-65534 Reserved for Private Use 65535 Reserved 17-65519 Specification Required 65520-65534 Private Use Rick Taylor 0 Reserved 1 Session Initialization Message 2 Session Initialization Response Message 3 Session Update Message 4 Session Update Response Message 5 Session Termination Message 6 Session Termination Response Message 7 Destination Up Message 8 Destination Up Response Message 9 Destination Announce Message 10 Destination Announce Response Message 11 Destination Down Message 12 Destination Down Response Message 13 Destination Update Message 14 Link Characteristics Request Message 15 Link Characteristics Response Message 16 Heartbeat Message 17 Credit Control 18 Credit Control Response 19-65519 Unassigned 65520-65534 Reserved for Private Use 65535 Reserved 26-65407 Specification Required 65408-65534 Private Use Rick Taylor 0 Reserved 1 Status 2 IPv4 Connection Point 3 IPv6 Connection Point 4 Peer Type 5 Heartbeat Interval 6 Extensions Supported 7 MAC Address 8 IPv4 Address 9 IPv6 Address 10 IPv4 Attached Subnet 11 IPv6 Attached Subnet 12 Maximum Data Rate (Receive) (MDRR) 13 Maximum Data Rate (Transmit) (MDRT) 14 Current Data Rate (Receive) (CDRR) 15 Current Data Rate (Transmit) (CDRT) 16 Latency 17 Resources (RES) 18 Relative Link Quality (Receive) (RLQR) 19 Relative Link Quality (Transmit) (RLQT) 20 Maximum Transmission Unit (MTU) 21 Hop Count 22 Hop Control 23 Queue Parameters 24 Pause 25 Restart 26 Link Identifier Length 27 Link Identifier 28 Latency Range 29 Traffic Classification 30 Credit Window Initialization 31 Credit Window Association 32 Credit Window Grant 33 Credit Window Status 34 Credit Window Request 35-65407 Unassigned 65408-65534 Reserved for Private Use 65535 Reserved 4-111 Specification Required 112-127 Private Use 133-239 Specification Required 240-254 Private Use Rick Taylor 0 Continue Success 1 Continue Not Interested 2 Continue Request Denied 3 Continue Inconsistent Data 4-111 Continue Unassigned 112-127 Continue Reserved for Private Use 128 Terminate Unknown Message 129 Terminate Unexpected Message 130 Terminate Invalid Data 131 Terminate Invalid Destination 132 Terminate Timed Out 133-239 Terminate Unassigned 240-254 Terminate Reserved for Private Use 255 Terminate Shutting Down 2-65519 Specification Required 65520-65534 Private Use Rick Taylor 0 Reserved 1 Multi-Hop Forwarding 2 Control-Plane-Based Pause 3 Link Identifiers 4 Latency Range 5 IEEE 802.1Q Aware Credit Window 6 Diffserv Aware Credit Window 7-65519 Unassigned 65520-65534 Reserved for Private Use 65535 Reserved Specification Required Rick Taylor 0-6 Unassigned 7 Use TLS indicator Specification Required Rick Taylor 0-6 Unassigned 7 Use TLS indicator Specification Required Rick Taylor 0-6 Unassigned 7 Secured Medium indicator Specification Required Rick Taylor 0-6 Unassigned 7 Add/Drop indicator Specification Required Rick Taylor 0-6 Unassigned 7 Add/Drop indicator Specification Required Rick Taylor 0-6 Unassigned 7 Add/Drop indicator Specification Required Rick Taylor 0-6 Unassigned 7 Add/Drop indicator 4-65519 Specification Required 65520-65534 Private Use Rick Taylor 0 Reset 1 Terminate 2 Direct Connection 3 Suppress Forwarding 4-65519 Unassigned 65520-65534 Reserved for Private Use 65535 Reserved 2-65407 Specification Required 65408-65534 Private Use Unassigned 0 Reserved 1 Queue Parameter 2-65407 Unassigned 65408-65534 Reserved for Private Use 65535 Reserved 1-65407 Specification Required 65408-65534 Private Use Unassigned 0 Reserved 1 Diffserv Traffic Classification 2 Ethernet Traffic Classification IEEE 802.1Q 3-65407 Unassigned 65408-65534 Reserved for Private Use 65535 Reserved