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