Internet Assigned Numbers Authority Segment Routing Created 2021-01-08 Last Updated 2024-04-19 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries included below • SRv6 Endpoint Behaviors • Segment Types SRv6 Endpoint Behaviors Reference [RFC8986] Available Formats [IMG] CSV Range Registration Procedures Note 0 Reserved Not to be allocated 1-32767 First Come First Served 32768-34815 Private Use 34816-65534 Reserved 65535 Reserved Opaque Value Hex Endpoint Behavior Reference Change Controller 0 0x0000 Reserved [RFC8986] IETF 1 0x0001 End [RFC8986] IETF 2 0x0002 End with PSP [RFC8986] IETF 3 0x0003 End with USP [RFC8986] IETF 4 0x0004 End with PSP & USP [RFC8986] IETF 5 0x0005 End.X [RFC8986] IETF 6 0x0006 End.X with PSP [RFC8986] IETF 7 0x0007 End.X with USP [RFC8986] IETF 8 0x0008 End.X with PSP & USP [RFC8986] IETF 9 0x0009 End.T [RFC8986] IETF 10 0x000A End.T with PSP [RFC8986] IETF 11 0x000B End.T with USP [RFC8986] IETF 12 0x000C End.T with PSP & USP [RFC8986] IETF 13 0x000D End.B6.Insert [draft-filsfils-spring-srv6-net-pgm-insertion-04] [Pablo_Camarillo] 14 0x000E End.B6.Encaps [RFC8986] IETF 15 0x000F End.BM [RFC8986] IETF 16 0x0010 End.DX6 [RFC8986] IETF 17 0x0011 End.DX4 [RFC8986] IETF 18 0x0012 End.DT6 [RFC8986] IETF 19 0x0013 End.DT4 [RFC8986] IETF 20 0x0014 End.DT46 [RFC8986] IETF 21 0x0015 End.DX2 [RFC8986] IETF 22 0x0016 End.DX2V [RFC8986] IETF 23 0x0017 End.DT2U [RFC8986] IETF 24 0x0018 End.DT2M [RFC8986] IETF 25 0x0019 Reserved [RFC8986] IETF 26 0x001A End.B6.Insert.Red [draft-filsfils-spring-srv6-net-pgm-insertion-04] [Pablo_Camarillo] 27 0x001B End.B6.Encaps.Red [RFC8986] IETF 28 0x001C End with USD [RFC8986] IETF 29 0x001D End with PSP & USD [RFC8986] IETF 30 0x001E End with USP & USD [RFC8986] IETF 31 0x001F End with PSP, USP & USD [RFC8986] IETF 32 0x0020 End.X with USD [RFC8986] IETF 33 0x0021 End.X with PSP & USD [RFC8986] IETF 34 0x0022 End.X with USP & USD [RFC8986] IETF 35 0x0023 End.X with PSP, USP & USD [RFC8986] IETF 36 0x0024 End.T with USD [RFC8986] IETF 37 0x0025 End.T with PSP & USD [RFC8986] IETF 38 0x0026 End.T with USP & USD [RFC8986] IETF 39 0x0027 End.T with PSP, USP & USD [RFC8986] IETF 40 0x0028 End.MAP [RFC9433] IETF 41 0x0029 End.Limit [RFC9433] IETF 42 0x002A End with NEXT-ONLY-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 43 0x002B End with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 44 0x002C End with NEXT-CSID & PSP [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 45 0x002D End with NEXT-CSID & USP [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 46 0x002E End with NEXT-CSID, PSP & USP [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 47 0x002F End with NEXT-CSID & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 48 0x0030 End with NEXT-CSID, PSP & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 49 0x0031 End with NEXT-CSID, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 50 0x0032 End with NEXT-CSID, PSP, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 51 0x0033 End.X with NEXT-ONLY-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 52 0x0034 End.X with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 53 0x0035 End.X with NEXT-CSID & PSP [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 54 0x0036 End.X with NEXT-CSID & USP [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 55 0x0037 End.X with NEXT-CSID, PSP & USP [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 56 0x0038 End.X with NEXT-CSID & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 57 0x0039 End.X with NEXT-CSID, PSP & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 58 0x003A End.X with NEXT-CSID, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 59 0x003B End.X with NEXT-CSID, PSP, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Pablo_Camarillo] 60 0x003C End.DX6 with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 61 0x003D End.DX4 with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 62 0x003E End.DT6 with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 63 0x003F End.DT4 with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 64 0x0040 End.DT46 with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 65 0x0041 End.DX2 with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 66 0x0042 End.DX2V with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 67 0x0043 End.DT2U with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 68 0x0044 End.DT2M with NEXT-CSID [draft-filsfils-spring-net-pgm-extension-srv6-usid-10] [Pablo_Camarillo] 69 0x0045 End.M.GTP6.D [RFC9433] IETF 70 0x0046 End.M.GTP6.Di [RFC9433] IETF 71 0x0047 End.M.GTP6.E [RFC9433] IETF 72 0x0048 End.M.GTP4.E [RFC9433] IETF 73 0x0049 End.DTM [draft-agrawal-spring-srv6-mpls-interworking-05] [Pablo_Camarillo] 74 0x004A End.M (Mirror SID) [draft-ietf-rtgwg-srv6-egress-protection-02] IETF 75 0x004B End.Replicate [RFC9524] IETF 76 0x004C End.DTMC4 [draft-ietf-bess-mvpn-evpn-sr-p2mp-06] [Rishabh_Parekh] 77 0x004D End.DTMC6 [draft-ietf-bess-mvpn-evpn-sr-p2mp-06] [Rishabh_Parekh] 78 0x004E End.DTMC46 [draft-ietf-bess-mvpn-evpn-sr-p2mp-06] [Rishabh_Parekh] 79 0x004F End.BXC [draft-han-spring-srv6-underlay-tunnel-programming-02] [Ran_Chen] 80 0x0050 End.BXC with PSP [draft-han-spring-srv6-underlay-tunnel-programming-02] [Ran_Chen] 81 0x0051 End.BXC with USP [draft-han-spring-srv6-underlay-tunnel-programming-02] [Ran_Chen] 82 0x0052 End.BXC with USD [draft-han-spring-srv6-underlay-tunnel-programming-02] [Ran_Chen] 83 0x0053 End.BXC with PSP, USP & USD [draft-han-spring-srv6-underlay-tunnel-programming-02] [Ran_Chen] 84 0x0054 End.NSH - NSH Segment [RFC9491] IETF 85 0x0055 End.T with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 86 0x0056 End.T with NEXT-CSID & PSP [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 87 0x0057 End.T with NEXT-CSID & USP [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 88 0x0058 End.T with NEXT-CSID, PSP & USP [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 89 0x0059 End.T with NEXT-CSID & USD [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 90 0x005A End.T with NEXT-CSID, PSP & USD [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 91 0x005B End.T with NEXT-CSID, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 92 0x005C End.T with NEXT-CSID, PSP, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 93 0x005D End.B6.Encaps with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 94 0x005E End.B6.Encaps.Red with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 95 0x005F End.BM with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-07] [Francois_Clad] 96 0x0060 End.PS with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-11] [Francois_Clad] 97 0x0061 End.XPS with NEXT-CSID [draft-ietf-spring-srv6-srh-compression-11] [Francois_Clad] 98-99 0x0062-0x0063 Unassigned 100 0x0064 End.PSID [draft-ietf-spring-srv6-path-segment-02] [Cheng_Li] 101 0x0065 End with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 102 0x0066 End with REPLACE-CSID & PSP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 103 0x0067 End with REPLACE-CSID & USP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 104 0x0068 End with REPLACE-CSID, PSP & USP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 105 0x0069 End.X with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 106 0x006A End.X with REPLACE-CSID & PSP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 107 0x006B End.X with REPLACE-CSID & USP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 108 0x006C End.X with REPLACE-CSID, PSP & USP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 109 0x006D End.T with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 110 0x006E End.T with REPLACE-CSID & PSP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 111 0x006F End.T with REPLACE-CSID & USP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 112 0x0070 End.T with REPLACE-CSID, PSP & USP [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 113 0x0071 Unassigned 114 0x0072 End.B6.Encaps with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 115 0x0073 End.BM with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 116 0x0074 End.DX6 with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 117 0x0075 End.DX4 with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 118 0x0076 End.DT6 with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 119 0x0077 End.DT4 with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 120 0x0078 End.DT46 with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 121 0x0079 End.DX2 with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 122 0x007A End.DX2V with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 123 0x007B End.DT2U with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 124 0x007C End.DT2M with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 125-126 0x007D-0x007E Unassigned 127 0x007F End.B6.Encaps.Red with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 128 0x0080 End with REPLACE-CSID & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 129 0x0081 End with REPLACE-CSID, PSP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 130 0x0082 End with REPLACE-CSID, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 131 0x0083 End with REPLACE-CSID, PSP, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 132 0x0084 End.X with REPLACE-CSID & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 133 0x0085 End.X with REPLACE-CSID, PSP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 134 0x0086 End.X with REPLACE-CSID, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 135 0x0087 End.X with REPLACE-CSID, PSP, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 136 0x0088 End.T with REPLACE-CSID & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 137 0x0089 End.T with REPLACE-CSID, PSP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 138 0x008A End.T with REPLACE-CSID, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 139 0x008B End.T with REPLACE-CSID, PSP, USP & USD [draft-ietf-spring-srv6-srh-compression-07] [Cheng_Li] 140 0x008C End.PS with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-11] [Francois_Clad] 141 0x008D End.XPS with REPLACE-CSID [draft-ietf-spring-srv6-srh-compression-11] [Francois_Clad] 142-149 0x008E-0x0095 Unassigned 150 0x0096 End.XU [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 151 0x0097 End.XU with PSP [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 152 0x0098 End.XU with USP [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 153 0x0099 End.XU with USD [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 154 0x009A End.XU with PSP, USP & USD [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 155 0x009B End.XU with REPPLACE-CSID [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 156 0x009C End.XU with REPPLACE-CSID & PSP [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 157 0x009D End.XU with REPPLACE-CSID & PSP & USP & USD [draft-dong-spring-srv6-inter-layer-programming-04] [Jie_Dong] 158 0x009E End.DX1 [draft-ietf-pals-ple-02] IETF 159 0x009F End.DX1 with NEXT-CSID [draft-ietf-pals-ple-02] IETF 160 0x00A0 End.DX1 with REPLACE-CSID [draft-ietf-pals-ple-02] IETF 161-32766 0x00A1-0x7FFE Unassigned 32767 0x7FFF The SID defined in [RFC8754] [RFC8986][RFC8754] IETF 32768-34815 0x8000-0x87FF Reserved for Private Use [RFC8986] IETF 34816-65534 0x8800-0xFFFE Reserved [RFC8986] IETF 65535 0xFFFF Opaque [RFC8986] IETF Segment Types Registration Procedure(s) Specification Required Expert(s) Ketan Talaulikar, Matthew Bocci Reference [RFC9256] Available Formats [IMG] CSV Value Description Reference A SR-MPLS Label [RFC9256] B SRv6 SID [RFC9256] C IPv4 Prefix with optional SR Algorithm [RFC9256] D IPv6 Global Prefix with optional SR Algorithm for SR-MPLS [RFC9256] E IPv4 Prefix with Local Interface ID [RFC9256] F IPv4 Addresses for link endpoints as Local, Remote pair [RFC9256] G IPv6 Prefix and Interface ID for link endpoints as Local, Remote pair for SR-MPLS [RFC9256] H IPv6 Addresses for link endpoints as Local, Remote pair for SR-MPLS [RFC9256] I IPv6 Global Prefix with optional SR Algorithm for SRv6 [RFC9256] J IPv6 Prefix and Interface ID for link endpoints as Local, Remote pair for SRv6 [RFC9256] K IPv6 Addresses for link endpoints as Local, Remote pair for SRv6 [RFC9256] Contact Information ID Name Contact URI Last Updated [Cheng_Li] Cheng Li mailto:c.l&huawei.com 2023-09-01 [Francois_Clad] Francois Clad mailto:fclad.ietf&gmail.com 2024-01-18 [Jie_Dong] Jie Dong mailto:jie.dong&huawei.com 2022-10-14 [Pablo_Camarillo] Pablo Camarillo mailto:pcamaril&cisco.com 2023-01-13 [Ran_Chen] Ran Chen mailto:chen.ran&zte.com.cn 2022-11-23 [Rishabh_Parekh] Rishabh Parekh mailto:riparekh&cisco.com 2022-07-05 Licensing Terms