2023-07-14 2023-11-21 0-31 IETF Review 32-62 First Come First Served 0 Reserved 1 SFC Echo Request/Reply 2-62 Unassigned 63 Reserved Standards Action 0-15 Unassigned 0-175 IETF Review 176-239 First Come First Served 240-251 Experimental Use 252-254 Private Use 0 Reserved 1 SFC Echo Request 2 SFC Echo Reply 3 SFP Consistency Verification Request 4 SFP Consistency Verification Reply 5-239 Unassigned 240-251 Reserved for Experimental Use 252-254 Reserved for Private Use 255 Reserved 0-175 IETF Review 176-239 First Come First Served 240-251 Experimental Use 252-254 Private Use 0 Reserved 1 Do Not Reply 2 Reply via an IPv4/IPv6 UDP Packet 3 Unassigned 4 Reply via Specified Path 5 Reply via an IPv4/IPv6 UDP Packet with the data integrity protection 6 Unassigned 7 Reply via Specified Path with the data integrity protection 8-239 Unassigned 240-251 Reserved for Experimental Use 252-254 Reserved for Private Use 255 Reserved 0-191 IETF Review 192-251 First Come First Served 252-254 Private Use 0 No Error 1 Malformed Echo Request received 2 One or more of the TLVs was not understood 3 Authentication failed 4 SFC TTL Exceeded 5 End of the SFP 6 Reply Service Function Path TLV is missing 7 Reply SFP was not found 8 Unverifiable Reply Service Function Path 9-251 Unassigned 252-254 Reserved for Private Use 255 Reserved 0-175 IETF Review 176-239 First Come First Served 240-251 Experimental Use 252-254 Private Use 0 Reserved 1 Source ID TLV 2 Errored TLVs 3 Reply Service Function Path Type 4 SFF Information Record Type 5 SF Information 6-239 Unassigned 240-251 Reserved for Experimental Use 252-254 Reserved for Private Use 255 Reserved 0-191 IETF Review 192-251 First Come First Served 252-254 Private Use 0 Reserved 1 IPv4 2 IPv6 3 MAC 4-251 Unassigned 252-254 Reserved for Private Use 255 Reserved