Internet Assigned Numbers Authority • Domains • Protocols • Numbers • About BIER Echo Request/Reply Created 2026-10-22 Last Updated 2026-10-22 Available Formats [IMG] XML [IMG] HTML [IMG] TXT Registries Included Below • Reply Modes • Return Codes • TLVs • Sub-TLVs for Type 4 Reply Modes Reference [RFC-ietf-bier-ping-29] Available Formats [IMG] CSV Range Registration Procedures 0-247 IETF Review 248-251 Reserved for Experimental Use 252-255 Reserved for Private Use Value Description Reference 0 Reserved [RFC-ietf-bier-ping-29] 1 Do Not Reply [RFC-ietf-bier-ping-29] 2 Reply via an IPv4/IPv6 UDP Packet [RFC-ietf-bier-ping-29] 3 Reply via a BIER packet [RFC-ietf-bier-ping-29] 4-247 Unassigned 248-251 Reserved for Experimental Use [RFC-ietf-bier-ping-29] 252-255 Reserved for Private Use [RFC-ietf-bier-ping-29] Return Codes Reference [RFC-ietf-bier-ping-29] Available Formats [IMG] CSV Range Registration Procedures 0-247 IETF Review 248-251 Reserved for Experimental Use 252-255 Reserved for Private Use [RFC-ietf-bier-ping-29] 0 No Return Code [RFC-ietf-bier-ping-29] 1 Malformed Echo Request received [RFC-ietf-bier-ping-29] 2 One or more of the TLVs is not supported [RFC-ietf-bier-ping-29] 3 Replying BFR is the only BFER in the BIER header BitString [RFC-ietf-bier-ping-29] 4 Replying BFR is one of the BFERs in the BIER header BitString [RFC-ietf-bier-ping-29] 5 Packet-Forward-Success [RFC-ietf-bier-ping-29] 6 Invalid Multipath Info Request [RFC-ietf-bier-ping-29] 7 Unassigned 8 No matching entry in the forwarding table [RFC-ietf-bier-ping-29] 9 Set-Identifier Mismatch [RFC-ietf-bier-ping-29] 10 DDMAP Mismatch [RFC-ietf-bier-ping-29] 11-247 Unassigned 248-251 Reserved for Experimental Use [RFC-ietf-bier-ping-29] 252-255 Reserved for Private Use [RFC-ietf-bier-ping-29] TLVs Reference [RFC-ietf-bier-ping-29] Available Formats [IMG] CSV Range Registration Procedures Note 0-16383 Standards Action This range is for TLVs and sub-TLVs that require an error message if not recognized. 16384-31739 RFC Required This range is for TLVs and sub-TLVs that require an error message if not recognized. 31740-31743 Reserved for Experimental Use Not to be assigned. 31744-32767 First Come First Served This range is for TLVs and sub-TLVs that require an error message if not recognized. 32768-49161 Standards Action This range is for TLVs and sub-TLVs that can be silently dropped if not recognized. 49162-64507 RFC Required This range is for TLVs and sub-TLVs that can be silently dropped if not recognized. 64508-64511 Reserved for Experimental Use Not to be assigned. 64512-65535 First Come First Served This range is for TLVs and sub-TLVs that can be silently dropped if not recognized. Type TLV Name Reference Sub-TLV Registry 0 Reserved [RFC-ietf-bier-ping-29] 1 Original SI-BitString [RFC-ietf-bier-ping-29] No Sub-TLVs 2 Target SI-BitString [RFC-ietf-bier-ping-29] No Sub-TLVs 3 Incoming SI-BitString [RFC-ietf-bier-ping-29] No Sub-TLVs 4 Downstream Detailed Mapping [RFC-ietf-bier-ping-29] [Sub-TLVs for TLV Type 4] 5 Responder BFER [RFC-ietf-bier-ping-29] No Sub-TLVs 6 Responder BFR [RFC-ietf-bier-ping-29] No Sub-TLVs 7 Ingress Interface [RFC-ietf-bier-ping-29] No Sub-TLVs 8 Erroneous Echo Request [RFC-ietf-bier-ping-29] No Sub-TLVs Sub-TLVs for Type 4 Reference [RFC-ietf-bier-ping-29] Available Formats [IMG] CSV Type Sub-TLV Name Reference 0 Reserved [RFC-ietf-bier-ping-29] 1 MPLS Multipath Entropy Data [RFC-ietf-bier-ping-29] 2 Egress BitString [RFC-ietf-bier-ping-29] Licensing Terms