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SRv6 Support Matrix

Which SRv6 features does each router OS and open-source data plane actually implement, and since which release? This page answers that for 11 platforms and 36 capabilities, from RFC 8986 endpoint behaviors to uSID, control-plane extensions, protection, multicast, OAM and mobile user plane. Every cell links to the vendor document, release note or source code that states it. When we could not find a source, the cell says unknown rather than guessing.

✓ Supported ◐ Partial or restricted ✗ Not supported (a source says so) ? Unknown (no source found)

Last verified: 2026-10-20. The data behind this table is also available as YAML.

Capability IOS-XR IOS-XE Junos EOS SR OS VRP FRR Linux SONiC VPP Cilium
Endpoint behaviors
End / uN RFC 8986 Supported 6.6.11 Supported 17.12.1a2 Supported 20.3R13 Supported 4.34.2F4 Supported 21.5.R25 Supported6 Supported 9.17 Supported 4.148 Partial 2021119 Supported 17.0410 Not supported11
End.X / uA RFC 8986 Supported 6.6.112 Supported 17.12.1a13 Supported 20.3R114 Partial 4.35.2F15 Supported 21.5.R216 Supported17 Supported 9.118 Supported 4.148 Partial 20240519 Supported 17.0420 Not supported11
End.T RFC 8986 Unknown Unknown Unknown Unknown Not supported21 Unknown Not supported22 Supported 4.1423 Partial 20211124 Supported 17.0725 Not supported11
End.DX2 / uDX2 RFC 8986 Supported 7.3.226 Unknown Supported 22.3R127 Unknown Supported 22.7.R128 Supported29 Not supported30 Supported 4.1423 Not supported31 Supported 17.0432 Not supported11
End.DX4 RFC 8986 Partial33 Unknown Unknown34 Not supported35 Not supported21 Supported36 Not supported37 Supported 4.1423 Partial 20240538 Supported 17.0432 Not supported11
End.DX6 RFC 8986 Partial39 Unknown Unknown40 Not supported35 Not supported21 Supported41 Not supported42 Supported 4.148 Partial 20240538 Supported 17.0432 Not supported11
End.DT4 / uDT4 RFC 8986 Supported 6.6.143 Supported 17.12.1a44 Supported 20.4R145 Supported46 Supported 21.5.R247 Supported17 Supported 8.348 Supported 5.1149 Partial 20211150 Supported 17.0432 Partial 1.1351
End.DT6 / uDT6 RFC 8986 Supported 7.2.252 Supported 17.12.1a53 Supported 20.4R154 Supported55 Supported 21.5.R247 Supported17 Supported 8.156 Supported 4.1457 Partial 20211150 Supported 17.0432 Partial 1.1358
End.DT46 / uDT46 RFC 8986 Supported 7.8.159 Partial60 Supported 22.1R161 Partial62 Supported21 Supported17 Supported 8.563 Supported 5.1464 Partial 20211165 Not supported66 Unknown
End.DT2U RFC 8986 Supported 7.5.267 Unknown Supported 23.4R168 Unknown Supported 22.7.R169 Supported70 Not supported71 Not supported72 Not supported31 Not supported66 Not supported11
End.DT2M RFC 8986 Supported 7.5.273 Unknown Partial 23.4R174 Unknown Supported 22.7.R169 Supported75 Not supported71 Not supported72 Not supported31 Not supported66 Not supported11
End.B6.Encaps (.Red) RFC 8986 Partial 7.10.176 Not supported77 Supported 25.2R178 Unknown Supported 22.7.R179 Supported80 Not supported81 Supported 4.1482 Partial 20211124 Supported 17.0483 Not supported11
End.BM RFC 8986 Unknown Unknown Unknown Unknown Unknown Unknown Not supported71 Not supported84 Not supported31 Not supported85 Not supported11
Headend behaviors
H.Encaps RFC 8986 Unknown86 Unknown Supported 20.3R187 Supported35 Not supported88 Supported89 Supported 8.190 Supported 4.1091 Partial 20230592 Supported 17.0493 Partial 1.1394
H.Encaps.Red RFC 8986 Supported95 Supported 17.12.1a96 Supported 20.3R197 Not supported35 Supported21 Supported17 Supported 10.498 Supported 6.099 Partial 202111100 Partial 17.04101 Partial 1.13102
H.Encaps.L2 (.Red) RFC 8986 Supported 7.3.2103 Unknown Supported 22.3R1104 Unknown Supported 22.7.R1105 Supported89 Not supported106 Supported 4.14107 Not supported31 Supported 17.04108 Not supported11
Flavors
PSP RFC 8986 Supported 7.3.195 Supported 17.12.1a96 Supported 20.3R1109 Supported35 Supported21 Supported17 Partial 10.4110 Partial 6.3111 Partial 202111112 Supported 17.0432 Not supported11
USP RFC 8986 Unknown Unknown Supported 20.3R1113 Not supported35 Supported21 Supported114 Not supported115 Not supported116 Not supported117 Not supported118 Not supported11
USD RFC 8986 Supported 7.3.1119 Supported 17.12.1a96 Supported 20.3R1113 Supported35 Supported21 Supported89 Not supported120 Not supported116 Partial 202111121 Not supported118 Not supported11
SID compression
NEXT-C-SID (uSID) RFC 9800 Supported 7.3.1122 Supported 17.12.1a123 Supported 23.2R1124 Supported 4.34.2F125 Supported ≤ 22.10126 Partial127 Supported 8.5128 Supported 6.1129 Partial 202211130 Supported 20.05131 Not supported132
REPLACE-C-SID (G-SID) RFC 9800 Unknown Unknown Not supported133 Unknown Unknown Supported V800R021C00134 Not supported135 Not supported116 Not supported136 Not supported66 Not supported11
Control plane
IS-IS SRv6 RFC 9352 Supported 6.6.1137 Supported 17.12.1a96 Supported 20.3R1138 Supported 4.36.1F139 Supported 21.5.R2140 Supported17 Supported 9.1141 Not supported142 Not supported143 Not supported144 Not supported145
OSPFv3 SRv6 RFC 9513 Unknown Unknown Unknown Unknown Not supported146 Supported17 Not supported147 Not supported142 Not supported148 Not supported144 Not supported145
BGP L3VPN over SRv6 RFC 9252 Supported 6.6.1149 Supported 17.12.1a150 Supported 20.4R1151 Partial152 Supported 21.5.R247 Supported17 Supported 8.1153 Not supported142 Partial 202505154 Not supported144 Not supported155
BGP EVPN over SRv6 RFC 9252 Supported 7.3.2156 Unknown Supported 22.3R1157 Partial158 Supported 22.5.R1159 Supported160 Not supported161 Not supported142 Not supported162 Not supported144 Not supported163
Global IPv4/IPv6 over SRv6 RFC 9252 Supported 7.2.2164 Unknown Supported 20.4R1165 Unknown Supported166 Supported17 Supported 10.6167 Not supported142 Unknown Not supported144 Unknown
BGP-LS SRv6 RFC 9514 Supported 24.4.1168 Unknown Supported 21.3R1169 Unknown Supported170 Supported17 Supported 10.7171 Not supported142 Unknown Not supported144 Not supported163
PCEP SRv6 RFC 9603 Partial172 Partial 17.16.1a173 Supported 22.3R1174 Unknown Supported 26.7175 Supported17 Not supported176 Not supported142 Unknown Not supported144 Not supported145
SRv6 SR Policy RFC 9256 / RFC 9830 Partial 7.3.2177 Partial 17.12.1a178 Supported 21.3R1179 Unknown180 Supported 22.7.R1181 Supported182 Partial 9.1183 Partial 4.10184 Partial 202111185 Supported 17.04186 Not supported187
Protection and traffic engineering
TI-LFA RFC 9855 Supported 6.6.1137 Supported 17.15.1a188 Supported 20.3R1189 Unknown190 Supported 21.5.R2191 Supported192 Not supported193 Not supported142 Unknown Not supported144 Not supported145
Microloop avoidance Supported 7.3.1194 Supported 17.15.1a195 Supported 21.1R1196 Unknown Supported 26.3197 Supported17 Not supported198 Not supported142 Unknown Not supported144 Not supported145
Flex-Algo RFC 9350 Supported199 Supported 17.18.1a200 Supported 20.3R1201 Supported 4.36.1F202 Supported 21.5.R2203 Supported17 Not supported204 Not supported142 Unknown Not supported144 Not supported145
Multicast
SRv6 multicast RFC 9524 / MVPN Not supported205 Partial 17.18.1a206 Unknown Unknown Partial 25.3207 Unknown208 Unknown Not supported72 Not supported31 Partial 17.04209 Not supported11
OAM
Ping / traceroute to SIDs RFC 9259 Supported 6.6.1210 Supported 17.12.1a211 Supported 21.3R1212 Supported213 Supported214 Supported17 Unknown Unknown Unknown Unknown Unknown
Performance measurement RFC 9503 Supported 7.4.1215 Supported 17.12.1a96 Supported 24.4R1216 Unknown Unknown Partial217 Unknown Unknown Unknown Partial 22.10218 Unknown
Mobile user plane
Mobile user plane RFC 9433 Unknown Unknown Unknown Unknown Not supported219 Unknown Not supported71 Not supported220 Not supported31 Partial 20.01221 Not supported11

How to Read This Matrix

  • Version numbers are the first release that a source documents for the feature (Cisco "Release x.y.z introduced", Juniper Feature Explorer "introduced in", kernel merge release, project release notes). A blank version on a ✓ means the feature is documented, but we found no first-release statement. Hardware matters: a feature introduced in a release is often limited to some platforms or line cards — the footnote says which.
  • Classic and uSID. A ✓ on an endpoint behavior means the platform implements it in at least one form: full-length SIDs (RFC 8986) or its NEXT-C-SID / uSID flavor (uN, uA, uDT46…). The footnote notes when only one form exists. See uSID Compression.
  • ◐ Partial means the feature exists with a significant restriction that is stated in the footnote (one form only, static configuration only, ASIC-dependent, preview).
  • Control-plane rows need the protocol to carry SRv6 information, not just to run over IPv6. A data-plane-only component (the Linux kernel, VPP) is ✗ there by design: pair it with a routing suite such as FRRouting.
  • Not listed ≠ not supported. Vendors ship features faster than documentation catches up. If you know better, tell us — see below.

Per-Platform Summary

Cisco IOS-XR SRv6 support

IOS-XR has had SRv6 since 6.6.1 (full-length SIDs, IS-IS, TI-LFA, L3VPN, OAM) and uSID (F3216) since 7.3.1; most later features are built on uSID: EVPN-VPWS 7.3.2, EVPN E-LAN 7.5.2, End.DT46 7.8.1. Cisco 8000 needs Q200-based hardware and ASR 9000 third-generation line cards or later. Gaps: no SRv6 Tree-SID (Tree-SID is SR-MPLS only), no per-CE uDX4/uDX6 with uSID, no PCE-initiated SRv6 policies. Configuration guide →

Cisco IOS-XE SRv6 support

IOS-XE supports SRv6 uSID since 17.12.1a on the ASR 1000 and Catalyst 8000 edge routers: IS-IS, BGP L3VPN with per-VRF uDT4/uDT6, local SRv6-TE with dynamic paths, PM and OAM. TI-LFA and microloop avoidance came in 17.15.1a, Flex-Algo and IPv4 MVPN ingress replication in 17.18.1a. No EVPN over SRv6 and no binding SIDs are documented. Configuration guide →

Juniper SRv6 support (Junos and Junos Evolved)

Junos OS supports SRv6 on MX since 20.3R1 (classic SIDs, IS-IS, Flex-Algo, TI-LFA), with BGP services from 20.4R1. uSID (NEXT-C-SID only; REPLACE-C-SID is not supported) arrived in 23.2R1 on ACX7000 and 23.4R1 on MX; PTX10002-36QDD and PTX10008 follow in 24.x. Junos has the broadest documented service set among the vendors here, including EVPN-VPWS and E-LAN, PCEP and BGP-LS. Configuration guide →

Arista EOS SRv6 support

EOS is uSID-only: uN since 4.34.2F, static uA 4.35.2F, IS-IS SRv6 and Flex-Algo on 7280R4/7800R4 since 4.36.1F. Arista's public documentation covers transport behaviors; BGP L3VPN and EVPN RT5 over SRv6 have only been shown in EANTC interoperability tests, so those cells are ◐. H.Encaps.Red, USP and End.DX4/DX6 are listed as unsupported. Platform page →

Nokia SR OS SRv6 support

SR OS supports SRv6 since 21.5.R2 on FP4-based hardware, with classic and micro-segment (uSID) SIDs side by side. It covers L3VPN, EVPN-VPLS/VPWS/IFL, BGP SR Policy, TI-LFA and Tree-SID SRv6 multicast (25.3, with restrictions). It uses only the reduced headend behaviors and does not implement End.T, End.DX4/DX6, OSPFv3 SRv6 or RFC 9433. Platform page →

Huawei VRP SRv6 support

Huawei's NetEngine 8000 V800R025 configuration guide documents nearly every row: all main endpoint and headend behaviors, IS-IS and OSPFv3 SRv6, L3VPN/EVPN/global services, SRv6 TE Policy with PCEP and BGP, TI-LFA, microloop avoidance and Flex-Algo. Its compression is G-SRv6 (REPLACE-C-SID), with NEXT-C-SID available only as a 16-bit interop mode. Huawei's portal no longer publishes guides older than V800R023, so most cells have no first-release number.

FRRouting SRv6 support

FRR has signaled SRv6 L3VPN in BGP since 8.1, uSID since 8.5 and IS-IS SRv6 since 9.1; 10.6 added global-table services and 10.7 BGP-LS. Because it programs the Linux kernel, it inherits the kernel's gaps (no USP/USD, no End.DT2U/DT2M). SRv6 TI-LFA, Flex-Algo, OSPFv3, PCEP and EVPN over SRv6 are not in any release yet. Configuration guide →

Linux kernel SRv6 support

The kernel has had SRv6 encapsulation since 4.10 and endpoint behaviors since 4.14; End.DT4 (5.11), End.DT46 (5.14), H.Encaps.Red (6.0), NEXT-C-SID (6.1) and PSP (6.3) came later. It is a data plane only: control-plane rows are ✗ by design. Behavior-by-kernel table →

SONiC SRv6 support

SONiC programs SRv6 into the switch ASIC through SAI. It has carried SRv6 code since 202111, uSID since 202211 and static CONFIG_DB SIDs (rated Alpha) since 202505. Every data-plane cell is ◐ because forwarding depends on each vendor's SAI implementation. SAI has no L2 behaviors, and SONiC's FRR container does not run an IGP for SRv6. Platform page →

FD.io VPP SRv6 support

VPP has been an SRv6 software data plane since 17.04, with uN in 20.05, uA in 25.02 and the srv6-mobile plugin (GTP-U interworking) in 20.01. It has no routing protocols, no End.DT46 and only the PSP flavor.

Cilium SRv6 support

Open-source Cilium contains a hidden, beta SRv6 datapath since 1.13 (single-SID encapsulation and decapsulation to IPv4/IPv6) but no control plane to drive it. SRv6 L3VPN and uSID are features of Isovalent Enterprise for Cilium, which this column does not cover. Platform page →

Other implementations

zebra-rs and Vinbero are eBPF-based open-source SRv6 stacks with their own behavior tables; they are not yet columns here. Nokia SR Linux added SRv6 in 26.3 (see the Nokia page).

Corrections and Additions

This matrix is maintained in the open. If you are a vendor, an operator or a contributor and a cell is wrong, outdated or unknown while you can point to a public source:

We accept public vendor documentation, release notes, feature explorers, source code and RFC implementation reports. We do not accept marketing claims without a document behind them, and we will not mark a feature supported because a roadmap says it is coming.

  1. Cisco IOS-XR: Full-length End in 6.6.1; uN (uSID) from 7.3.1. Source: Cisco NCS 5500 Release Notes, IOS XR 6.6.1; Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  2. Cisco IOS-XE: uN only (uSID), with PSP/USD. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  3. Juniper Junos / Junos Evolved: MX 20.3R1; uN MX 23.4R1, ACX7000 23.2R1. Source: Junos OS 20.3 In Focus Guide; Juniper CLI reference: locator micro-sid ↩

  4. Arista EOS: uN only (uSID F3216). Source: Arista TOI: SRv6 uN support (EOS 4.34.2F); Arista EOS 4.36.2F User Manual: Segment Routing over IPv6 ↩

  5. Nokia SR OS: FP4-based hardware; uN in micro-segment mode. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: Segment Routing with IPv6 data plane (21.5.R2 on FP4) ↩

  6. Huawei VRP: Huawei NetEngine 8000 V800R025C00 Configuration Guide: SRv6 description, SRv6 segments ↩

  7. FRRouting: IS-IS allocates End/uN SIDs from 9.1; static uN from 10.3. Source: FRR 9.1 isisd documentation: SRv6 ↩

  8. Linux kernel: Linux commit 140f04c33bbc: seg6local (4.14) ↩↩↩

  9. SONiC: SONiC 202111 release notes; sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩

  10. FD.io VPP: uN from 20.05. Source: FD.io VPP 26.06 docs: SR local SIDs; VPP 20.05 release notes ↩

  11. Cilium (open source): Cilium v1.20 source: bpf/lib/srv6.h (the whole open-source SRv6 datapath) ↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩

  12. Cisco IOS-XR: uA (uSID) from 7.3.1. Source: Cisco NCS 5500 Release Notes, IOS XR 6.6.1; Cisco ASR 9000 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  13. Cisco IOS-XE: uA; static End.X from 17.15.1a. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  14. Juniper Junos / Junos Evolved: uA from MX 23.4R1. Source: Juniper: Understanding SRv6 Network Programming in IS-IS Networks ↩

  15. Arista EOS: Static uA only. Source: Arista TOI: SRv6 static adjacency segments (uA), EOS 4.35.2F; Arista EOS 4.36.2F User Manual: IS-IS (Configuring SRv6 for IS-IS) ↩

  16. Nokia SR OS: End.X and LAN End.X; uA in micro-segment mode. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: Segment Routing with IPv6 data plane (21.5.R2 on FP4) ↩

  17. Huawei VRP: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩↩↩↩↩↩↩↩↩↩↩↩↩↩↩

  18. FRRouting: IS-IS End.X/uA adjacency SIDs; static uA from 10.4. Source: FRR 9.1 isisd documentation: SRv6 ↩

  19. SONiC: Adjacency programming (L3Adj) from 202405. Source: SONiC 202405 release notes; SONiC SRv6 SID L3Adj HLD ↩

  20. FD.io VPP: uA from 25.02. Source: FD.io VPP 26.06 docs: SR local SIDs; VPP 25.02 release notes ↩

  21. Nokia SR OS: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6 ↩↩↩↩↩↩↩↩

  22. FRRouting: The kernel has it, but only FRR's sharpd test daemon installs it. Source: FRR 10.7.1 staticd documentation: static SRv6 SID behaviors ↩

  23. Linux kernel: Linux commit 891ef8dd2a8d: End.T, End.DX2, End.DX4, End.DT6 (4.14) ↩↩↩

  24. SONiC: SAI saisrv6.h (SRv6 behaviors SAI can express); sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩↩

  25. FD.io VPP: VPP source: sr_localsid.c (CLI behaviors and flavors); FD.io VPP 26.06 feature list (SRv6) ↩

  26. Cisco IOS-XR: uDX2 for EVPN-VPWS in 7.3.2; full-length End.DX2 from 7.5.1 on NCS 5500. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  27. Juniper Junos / Junos Evolved: EVPN-VPWS on MX; uDX2 24.2R1; End.DX2V also available. Source: Juniper CLI reference: vpws-service-id ↩

  28. Nokia SR OS: End.DX2 and uDX2 for EVPN-VPWS. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: EVPN-VPWS with SRv6 transport ↩

  29. Huawei VRP: EVPN-VPWS. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  30. FRRouting: FRR 10.7.1 staticd documentation: static SRv6 SID behaviors ↩

  31. SONiC: SAI saisrv6.h (SRv6 behaviors SAI can express) ↩↩↩↩↩↩↩

  32. FD.io VPP: FD.io VPP 26.06 docs: SR local SIDs ↩↩↩↩↩↩

  33. Cisco IOS-XR: Full-length SIDs only; per-CE uDX4 is not supported with uSID. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID; Cisco NCS 5500 Segment Routing Configuration Guide 26.x: Configure SRv6 with Full-Length SIDs ↩

  34. Juniper Junos / Junos Evolved: Not among the BGP SRv6 service SID options (DT4/DT6/DT46 only). Source: Juniper CLI reference: srv6 (protocols bgp source-packet-routing) ↩

  35. Arista EOS: Arista EOS 4.36.2F User Manual: Segment Routing over IPv6 ↩↩↩↩↩↩↩

  36. Huawei VRP: Per-interface SID for EVPN L3VPN. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: SRv6 description, SRv6 segments ↩

  37. FRRouting: The kernel has it, but only FRR's sharpd test daemon installs it. Source: FRR 10.7.1 staticd documentation: static SRv6 SID behaviors ↩

  38. SONiC: SONiC SRv6 SID L3Adj HLD; sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩↩

  39. Cisco IOS-XR: Full-length SIDs only; per-CE uDX6 is not supported with uSID. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID; Cisco NCS 5500 Segment Routing Configuration Guide 26.x: Configure SRv6 with Full-Length SIDs ↩

  40. Juniper Junos / Junos Evolved: Not among the BGP SRv6 service SID options (DT4/DT6/DT46 only). Source: Juniper CLI reference: srv6 (protocols bgp source-packet-routing) ↩

  41. Huawei VRP: Per-interface SID for EVPN L3VPN. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: SRv6 description, SRv6 segments ↩

  42. FRRouting: The kernel has it, but only FRR's sharpd test daemon installs it. Source: FRR 10.7.1 staticd documentation: static SRv6 SID behaviors ↩

  43. Cisco IOS-XR: Per-VRF uDT4 with uSID from 7.3.1. Source: Cisco NCS 5500 Release Notes, IOS XR 6.6.1; Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  44. Cisco IOS-XE: Per-VRF allocation only. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  45. Juniper Junos / Junos Evolved: uDT4 MX 23.4R1, ACX7000 23.2R1. Source: Juniper CLI reference: srv6 (protocols bgp source-packet-routing) ↩

  46. Arista EOS: Listed as supported in show srv6 capabilities; no configuration documented. Source: Arista EOS 4.36.2F User Manual: Segment Routing over IPv6 ↩

  47. Nokia SR OS: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: SRv6 Flex-Algo for VPRN ↩↩↩

  48. FRRouting: BGP SRv6 VPNv4. Source: FRR PR #9649: SRv6 IPv4 L3VPN ↩

  49. Linux kernel: vrftable only; needs net.vrf.strict_mode=1. Source: Linux commit 664d6f86868b: End.DT4 (5.11) ↩

  50. SONiC: sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩↩

  51. Cilium (open source): Hidden beta datapath; nothing in open-source Cilium programs the SIDs (Isovalent Enterprise does). Source: Cilium v1.20 source: bpf_host.c SRv6 decapsulation; Cilium v1.20 source: hidden --enable-srv6 (beta) and --srv6-encap-mode flags ↩

  52. Cisco IOS-XR: Full-length 7.2.2 (NCS 5500); uDT6 from 7.3.1. Source: Cisco NCS 5500 Segment Routing Configuration Guide 26.x: Configure SRv6 with Full-Length SIDs; Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  53. Cisco IOS-XE: Per-VRF allocation only. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  54. Juniper Junos / Junos Evolved: uDT6 MX 23.4R1, ACX7000 23.2R1. Source: Juniper CLI reference: srv6 (protocols bgp source-packet-routing) ↩

  55. Arista EOS: Listed as supported in show srv6 capabilities; no configuration documented. Source: Arista EOS 4.36.2F User Manual: Segment Routing over IPv6 ↩

  56. FRRouting: BGP SRv6 VPNv6. Source: FRR 8.1 bgpd documentation: L3VPN SRv6 ↩

  57. Linux kernel: VRF (vrftable) mode from 5.11. Source: Linux commit 891ef8dd2a8d: End.T, End.DX2, End.DX4, End.DT6 (4.14) ↩

  58. Cilium (open source): Hidden beta datapath; nothing in open-source Cilium programs the SIDs (Isovalent Enterprise does). Source: Cilium v1.20 source: bpf/lib/srv6.h (the whole open-source SRv6 datapath); Cilium v1.20 source: hidden --enable-srv6 (beta) and --srv6-encap-mode flags ↩

  59. Cisco IOS-XR: First on ASR 9000. Source: Cisco ASR 9000 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  60. Cisco IOS-XE: uDT46 is listed, but BGP does not allocate or advertise it. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  61. Juniper Junos / Junos Evolved: uDT46 MX 23.4R1, ACX7000 23.2R1. Source: Juniper CLI reference: srv6 (protocols bgp source-packet-routing) ↩

  62. Arista EOS: Interop-tested at EANTC 2026 (7280R4); not in Arista's public docs. Source: EANTC 2026 interop report: L3VPN over SRv6 ↩

  63. FRRouting: Per-VRF SID; global-table uDT46 from 10.7. Source: FRR 8.5 release notes ↩

  64. Linux kernel: Linux commit 8b532109bf88: End.DT46 (5.14) ↩

  65. SONiC: Static CONFIG_DB uDT46 from 202505 (rated Alpha). Source: SONiC SRv6 HLD; SONiC 202505 release notes ↩

  66. FD.io VPP: VPP source: sr_types.api (behavior enum) ↩↩↩↩

  67. Cisco IOS-XR: uDT2U for EVPN E-LAN. Source: Cisco ASR 9000 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  68. Juniper Junos / Junos Evolved: EVPN E-LAN end-dt2-sid / micro-dt2-sid on some MX models; more MX and ACX in 24.x. Source: Juniper CLI reference: source-packet-routing (routing-instances protocols evpn) ↩

  69. Nokia SR OS: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: EVPN-VPLS over SRv6 ↩↩

  70. Huawei VRP: EVPN VPLS. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  71. FRRouting: FRR 10.7.1 source: lib/srv6.h seg6local actions ↩↩↩↩

  72. Linux kernel: Linux v7.3 seg6_local.c: action table ↩↩↩

  73. Cisco IOS-XR: uDT2M for EVPN E-LAN BUM with ESI filtering. Source: Cisco ASR 9000 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  74. Juniper Junos / Junos Evolved: E-LAN BUM traffic is handled, but the docs only name a generic End.DT2 SID. Source: Juniper: Configuring EVPN-ELAN over SRv6 ↩

  75. Huawei VRP: EVPN VPLS BUM; arguments carry the ESI for split horizon. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  76. Cisco IOS-XR: Cisco 8000 binds SRv6-TE policies with uB6.Encaps.Red; NCS 5500 and ASR 9000 document uB6.Insert.Red. Source: Cisco 8000 Segment Routing Configuration Guide 7.10.x: SRv6 Traffic Engineering; Cisco NCS 5500 Segment Routing Configuration Guide 7.10.x: SRv6 Traffic Engineering ↩

  77. Cisco IOS-XE: SRv6 Binding SIDs are not supported. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  78. Juniper Junos / Junos Evolved: ACX7000 25.2R1, MX 26.2R1; classic and NEXT-C-SID, encaps and .Red. Source: Juniper: End.B6 SID for SRv6 ↩

  79. Nokia SR OS: End.B6.Encaps.Red only, one Binding SID per policy. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: SRv6 policies for Layer 2 and Layer 3 services ↩

  80. Huawei VRP: Encaps and reduced variants, plus End.B6.Insert. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  81. FRRouting: Codepoints are parsed, but no daemon configures a binding SID. Source: FRR 10.7.1 staticd documentation: static SRv6 SID behaviors ↩

  82. Linux kernel: End.B6.Encaps only; End.B6.Encaps.Red is not implemented. Source: Linux commit 140f04c33bbc: seg6local (4.14) ↩

  83. FD.io VPP: Binding SID of an SR policy. Source: FD.io VPP 26.06 docs: SR policies; FD.io VPP 26.06 feature list (SRv6) ↩

  84. Linux kernel: The name exists in the UAPI and iproute2, but the kernel has no implementation. Source: Linux v7.3 seg6_local.c: action table ↩

  85. FD.io VPP: FD.io VPP 26.06 feature list (SRv6) ↩

  86. Cisco IOS-XR: Cisco guides document H.Encaps.Red (and H.Insert.Red), not plain H.Encaps. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  87. Juniper Junos / Junos Evolved: Full SRH with no-reduced-srh. Source: Juniper: Understanding SRv6 Network Programming in IS-IS Networks ↩

  88. Nokia SR OS: Only the reduced variants (H.Encaps.Red, H.Encaps.L2.Red) are supported. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6 ↩

  89. Huawei VRP: Huawei NetEngine 8000 V800R025C00 Configuration Guide: SRv6 description, source node behaviors ↩↩↩

  90. FRRouting: BGP L3VPN; static SRv6 segment routes from 9.1. Source: FRR 8.1 bgpd documentation: L3VPN SRv6; FRR 10.7.1 staticd documentation: SRv6 SIDs and segment routes ↩

  91. Linux kernel: Linux commit 6c8702c60b88: seg6 encapsulation (4.10) ↩

  92. SONiC: sonic-swss PR #2406: SID list type selection ↩

  93. FD.io VPP: FD.io VPP 26.06 docs: SR policies ↩

  94. Cilium (open source): Single SID, --srv6-encap-mode=srh; hidden beta flag. Source: Cilium v1.20 source: bpf/lib/srv6.h (the whole open-source SRv6 datapath); Cilium v1.20 source: hidden --enable-srv6 (beta) and --srv6-encap-mode flags ↩

  95. Cisco IOS-XR: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩↩

  96. Cisco IOS-XE: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩↩↩↩↩

  97. Juniper Junos / Junos Evolved: Default encapsulation mode. Source: Juniper: Understanding SRv6 Network Programming in IS-IS Networks ↩

  98. FRRouting: staticd and BGP encap-behavior H_Encaps_Red. Source: FRR 10.7.1 staticd documentation: SRv6 SIDs and segment routes ↩

  99. Linux kernel: Linux commit b07c8cdbe918: H.Encaps.Red (6.0) ↩

  100. SONiC: Default SID list type. Source: SONiC SRv6 HLD; sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩

  101. FD.io VPP: The SRH is dropped only for single-SID lists. Source: FD.io VPP 26.06 feature list (SRv6); VPP source: sr_policy_rewrite.c ↩

  102. Cilium (open source): Single SID; the default encap mode; hidden beta flag. Source: Cilium v1.13 source: default SRv6 encap mode is reduced; Cilium v1.20 source: hidden --enable-srv6 (beta) and --srv6-encap-mode flags ↩

  103. Cisco IOS-XR: H.Encaps.L2.Red for EVPN VPWS and E-LAN. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  104. Juniper Junos / Junos Evolved: Used by EVPN over SRv6; not named as such in the docs. Source: Juniper: EVPN-VPWS over SRv6 ↩

  105. Nokia SR OS: H.Encaps.L2.Red only. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: EVPN-VPLS over SRv6 ↩

  106. FRRouting: staticd and bgpd offer only H.Encaps and H.Encaps.Red. Source: FRR 10.7.1 staticd documentation: SRv6 SIDs and segment routes ↩

  107. Linux kernel: l2encap 4.14; l2encap.red 6.0. Source: Linux commit 38ee7f2d4756: L2 encapsulation (4.14) ↩

  108. FD.io VPP: FD.io VPP 26.06 docs: SR steering; FD.io VPP 26.06 feature list (SRv6) ↩

  109. Juniper Junos / Junos Evolved: Juniper: Understanding SRv6 Network Programming in IS-IS Networks; Juniper CLI reference: locator micro-sid ↩

  110. FRRouting: Locator flavor psp; applied to End only, the kernel's limit. Source: FRR PR #18647: SRv6 PSP flavor ↩

  111. Linux kernel: End only. Source: Linux commit bdf3c0b9c10b: PSP flavor (6.3) ↩

  112. SONiC: Programmed as PSP and USD together. Source: sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩

  113. Juniper Junos / Junos Evolved: Juniper: Understanding SRv6 Network Programming in IS-IS Networks ↩↩

  114. Huawei VRP: Only combined with USD. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  115. FRRouting: The Linux kernel implements only PSP among RFC 8986 flavors. Source: Linux v7.3 seg6_local.c: supported RFC 8986 flavors (PSP only) ↩

  116. Linux kernel: Linux v7.3 seg6_local.c: supported flavors (PSP and NEXT-C-SID) ↩↩↩

  117. SONiC: Defined in SAI, never programmed by orchagent. Source: sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩

  118. FD.io VPP: VPP source: sr_localsid.c (CLI behaviors and flavors) ↩↩

  119. Cisco IOS-XR: uSID 7.3.1; USD on full-length SIDs from 7.5.2. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID; Cisco NCS 5500 Segment Routing Configuration Guide 26.x: Configure SRv6 with Full-Length SIDs ↩

  120. FRRouting: The Linux kernel implements only PSP among RFC 8986 flavors. Source: Linux v7.3 seg6_local.c: supported RFC 8986 flavors (PSP only) ↩

  121. SONiC: Programmed as PSP and USD together. Source: sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩

  122. Cisco IOS-XR: F3216. First-generation NCS 5500 needs an hw-module profile and a reload. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  123. Cisco IOS-XE: F3216 only; up to 10 uSID locators. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  124. Juniper Junos / Junos Evolved: ACX7000 23.2R1, MX 23.4R1, PTX10008 24.4R1-S2; default F3216. Source: Juniper CLI reference: srv6 block; Juniper CLI reference: locator micro-sid ↩

  125. Arista EOS: F3216. Source: Arista TOI: SRv6 uN support (EOS 4.34.2F); Arista EOS 4.36.2F User Manual: Segment Routing over IPv6 ↩

  126. Nokia SR OS: 16-bit uSIDs; already documented in the oldest online guide (22.10). Classic and micro SIDs can run together. Source: Nokia SR OS 22.10 Segment Routing and PCE User Guide: SRv6; Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6 ↩

  127. Huawei VRP: 16-bit C-SIDs only, as an interop mode; the default 16-bit mode is NEXT&REPLACE, which is not in RFC 9800. Source: Huawei NetEngine 8000 V800R025C00: SRH 16-bit compression ↩

  128. FRRouting: BGP uDT SIDs 8.5; IS-IS uN/uA 9.1; usid-f3216 format. Source: FRR PR #12219: SRv6 uSID; FRR 8.5 release notes ↩

  129. Linux kernel: End 6.1, End.X 6.6; default 32/16 (F3216). Source: Linux commit 848f3c0d4769: NEXT-C-SID flavor (6.1) ↩

  130. SONiC: uN, uA, uDT, uDX; static config defaults to F3216. Source: SONiC 202211 release notes; SONiC SRv6 static configuration HLD ↩

  131. FD.io VPP: uN 20.05, uA 25.02; 16- or 32-bit uSIDs. Source: VPP 20.05 release notes; VPP 25.02 release notes ↩

  132. Cilium (open source): Not in open-source Cilium; Isovalent Enterprise supports uSID. Source: Cilium v1.20 source: bpf/lib/srv6.h (the whole open-source SRv6 datapath); Cilium 1.13 release blog: SRv6 is an Isovalent Enterprise feature ↩

  133. Juniper Junos / Junos Evolved: Standards page for RFC 9800: only SRv6 micro-SIDs are supported. Source: Juniper: Supported segment routing standards ↩

  134. Huawei VRP: G-SRv6 with 32-bit (and 16-bit) G-SIDs. Release from Huawei's IETF implementation report. Source: Huawei NetEngine 8000 V800R025C00: G-SRv6 compression; draft-ietf-spring-srv6-srh-compression-23, implementation status (Huawei) ↩

  135. FRRouting: SID formats: usid-f3216 and uncompressed only. Source: FRR 10.7.1 zebra documentation: SRv6 SID formats ↩

  136. SONiC: SONiC SRv6 HLD; SAI saisrv6.h (SRv6 behaviors SAI can express) ↩

  137. Cisco IOS-XR: Cisco NCS 5500 Release Notes, IOS XR 6.6.1 ↩↩

  138. Juniper Junos / Junos Evolved: MX (MPC7E or newer); ACX7000 23.1R1; PTX10002-36QDD 24.2R2; PTX10008 24.4R1-S2. Source: Junos OS 20.3 In Focus Guide ↩

  139. Arista EOS: 7280R4 and 7800R4 series only. Source: Arista EOS 4.36.2F User Manual: IS-IS (Configuring SRv6 for IS-IS) ↩

  140. Nokia SR OS: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: Segment Routing with IPv6 data plane (21.5.R2 on FP4) ↩

  141. FRRouting: FRR 9.1 release notes ↩

  142. Linux kernel: srv6.md: SRv6 on Linux — the kernel is a data plane; control planes such as FRRouting program it ↩↩↩↩↩↩↩↩↩↩

  143. SONiC: The SONiC FRR container does not run isisd; SIDs come from BGP or static config. Source: sonic-buildimage FRR container supervisord config (daemons launched) ↩

  144. FD.io VPP: FD.io VPP 26.06 feature list: VPP is a data plane with no routing protocols ↩↩↩↩↩↩↩↩↩↩

  145. Cilium (open source): Cilium docs: BGP Control Plane (BGP only, no IGP or PCEP) ↩↩↩↩↩↩

  146. Nokia SR OS: IS-IS is the only SRv6 IGP; RFC 9513 is not in the standards list. Source: Nokia SR OS 26.7 Standards and protocol support; Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6 ↩

  147. FRRouting: ospf6d has no SRv6; FRR OSPF segment routing is OSPFv2 SR-MPLS. Source: FRR 10.7.1 ospfd documentation: segment routing is OSPFv2 SR-MPLS only ↩

  148. SONiC: The SONiC FRR container does not run ospf6d. Source: sonic-buildimage FRR container supervisord config (daemons launched) ↩

  149. Cisco IOS-XR: uSID L3VPN from 7.3.1. Source: Cisco NCS 5500 Release Notes, IOS XR 6.6.1; Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  150. Cisco IOS-XE: VPNv4/VPNv6 with per-VRF SIDs; ODN from 17.13.1a. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  151. Juniper Junos / Junos Evolved: Inter-AS Option C supported, Option B not. Source: Juniper: SRv6 Network Programming and Layer 3 Services in BGP Networks ↩

  152. Arista EOS: Interop-tested as PE at EANTC (7280R3 2025, 7280R4 2026); not in Arista's public docs. Source: EANTC 2025 interop report: L3VPN over SRv6; EANTC 2026 interop report: L3VPN over SRv6 ↩

  153. FRRouting: VPNv6 8.1, VPNv4 8.3; multiple locators and per-VRF locator 10.5. Source: FRR 8.1 bgpd documentation: L3VPN SRv6; FRR PR #9649: SRv6 IPv4 L3VPN ↩

  154. SONiC: SRv6 VPN code in srv6orch; not in the release notes. Source: SONiC SRv6 VPN HLD; sonic-swss PR #3293: SRv6 VPN in srv6orch ↩

  155. Cilium (open source): Not in open-source Cilium; SRv6 L3VPN is an Isovalent Enterprise feature (Beta since 1.13). Source: Cilium v1.20 source: BGP advertisement types; Isovalent Enterprise for Cilium 1.13: SRv6 L3VPN (Beta) ↩

  156. Cisco IOS-XR: EVPN-VPWS 7.3.2, E-LAN 7.5.2, RT5 7.9.1 (ASR 9000). Source: Cisco ASR 9000 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID; Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  157. Juniper Junos / Junos Evolved: EVPN-VPWS MX 22.3R1; E-LAN MX 23.4R1. Source: Juniper Feature Explorer: EVPN over SRv6; Juniper CLI reference: vpws-service-id ↩

  158. Arista EOS: EVPN RT5 interop-tested as PE at EANTC 2025 and 2026; not in Arista's public docs. Source: EANTC 2025 interop report: EVPN RT5 over SRv6; EANTC 2026 interop report: EVPN RT5 over SRv6 ↩

  159. Nokia SR OS: EVPN-IFL 22.5.R1; EVPN-VPLS and VPWS 22.7.R1. Source: Nokia Advanced Configuration Guide: VPRN EVPN-IFL over SRv6; Nokia Advanced Configuration Guide: EVPN-VPLS over SRv6; Nokia Advanced Configuration Guide: EVPN-VPWS with SRv6 transport ↩

  160. Huawei VRP: EVPN L3VPN, VPWS and VPLS. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  161. FRRouting: Not in any release up to 10.7.1; L3 EVPN (RT5) over SRv6 is merged for 10.8. Source: FRR PR #21927: SRv6 L3 EVPN (merged for 10.8) ↩

  162. SONiC: SAI has no L2 SRv6 behaviors. Source: SAI saisrv6.h (SRv6 behaviors SAI can express) ↩

  163. Cilium (open source): Cilium v1.20 source: BGP advertisement types ↩↩

  164. Cisco IOS-XR: IPv6 7.2.2, IPv4 7.5.1 (NCS 5500). Source: Cisco NCS 5500 Segment Routing Configuration Guide 26.x: Configure SRv6 with Full-Length SIDs; Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  165. Juniper Junos / Junos Evolved: Juniper CLI reference: advertise-srv6-service (family inet unicast) ↩

  166. Nokia SR OS: Nokia Advanced Configuration Guide: SRv6 encapsulation in the base routing instance ↩

  167. FRRouting: FRR 10.6.0 release notes ↩

  168. Cisco IOS-XR: Release stated for Cisco 8000. Source: Cisco 8000 SRv6 Configuration Guide: SRv6 SID information in BGP-LS reporting ↩

  169. Juniper Junos / Junos Evolved: MX960 21.3R1; MX10004 22.3R1. Source: Juniper Feature Explorer: BGP-LS SRv6 ↩

  170. Nokia SR OS: IS-IS topologies only. Source: Nokia SR OS 26.7 Unicast Routing Protocols Guide: BGP (BGP-LS) ↩

  171. FRRouting: FRR 10.7.0 release notes ↩

  172. Cisco IOS-XR: PCE-delegated SRv6 policies; PCE-initiated SRv6 policies listed as not supported. Source: Cisco NCS 5500 Segment Routing Configuration Guide 7.10.x: SRv6 Traffic Engineering; Cisco 8000 Segment Routing Configuration Guide 7.10.x: SRv6 Traffic Engineering ↩

  173. Cisco IOS-XE: PCE-delegated computation only; PCE-initiated policies are not supported. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  174. Juniper Junos / Junos Evolved: MX10004 22.3R1; RFC 9603 partial (no NAI-to-SID resolution). Source: Juniper: Supported segment routing standards ↩

  175. Nokia SR OS: First documented in 26.7. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6 ↩

  176. FRRouting: pathd and PCEP are SR-MPLS only. Source: FRR 10.7.1 pathd documentation (MPLS-based) ↩

  177. Cisco IOS-XR: Local and PCE-delegated SRv6-TE with uSID segments; the BGP SR Policy SAFI does not carry SRv6 segments. Source: Cisco NCS 5500 Segment Routing Configuration Guide 7.10.x: SRv6 Traffic Engineering; IETF IDR implementation report: BGP SR Policy SAFI ↩

  178. Cisco IOS-XE: Local SRv6-TE with dynamic segment lists only; no explicit lists, no Binding SID, no BGP SR Policy. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  179. Juniper Junos / Junos Evolved: Static and PCEP SRv6-TE policies; BGP SR Policy SAFI with SRv6 is not documented. Source: Juniper BGP User Guide (PDF): SR-TE policy for SRv6 tunnels ↩

  180. Arista EOS: EOS SR-TE policy is documented for SR-MPLS only. Source: Arista TOI: SR-TE policy (EOS 4.21.0F) ↩

  181. Nokia SR OS: Static and BGP SR Policy (SAFI 73); uSID in policies documented from 23.10. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: SRv6 policies for Layer 2 and Layer 3 services ↩

  182. Huawei VRP: SRv6 TE Policy, from local configuration, PCEP or the BGP SR Policy address family. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  183. FRRouting: Static routes into SRv6 SID lists (IPv6 9.1, IPv4 10.4); no SR Policy construct. Source: FRR 10.7.1 staticd documentation: SRv6 SIDs and segment routes ↩

  184. Linux kernel: seg6 routes steer into explicit SID lists; no SR Policy construct. Source: ip-route(8): seg6 encapsulation with explicit segment lists ↩

  185. SONiC: Static steering into SID lists; no BGP SR Policy. Source: SONiC SRv6 HLD; sonic-swss srv6orch.cpp (forwarding depends on each ASIC's SAI implementation) ↩

  186. FD.io VPP: Local SR policies with steering; no BGP SR Policy. Source: FD.io VPP 26.06 docs: SR policies; FD.io VPP 26.06 docs: SR steering ↩

  187. Cilium (open source): Single-SID encapsulation only. Source: Cilium 1.13 release blog: SRv6 is an Isovalent Enterprise feature ↩

  188. Cisco IOS-XE: Cisco IOS XE 17: IS-IS SRv6 TI-LFA ↩

  189. Juniper Junos / Junos Evolved: uSID 23.4R1; SRLG-aware from 26.2R1. Source: Junos OS 20.3 In Focus Guide; Juniper Feature Explorer: SRLG-aware TI-LFA (IS-IS IPv6 SRLG) ↩

  190. Arista EOS: The IS-IS SRv6 TOI is tagged TI-LFA, but its body needs a login and the manual does not document it. Source: Arista TOI listing: SRv6 ↩

  191. Nokia SR OS: Repair tunnels use H.Insert.Red; H.Encaps.Red repair tunnels from other vendors are terminated. Source: Nokia SR OS 26.7 Segment Routing and PCE User Guide: SRv6; Nokia Advanced Configuration Guide: SRv6 loop-free alternate ↩

  192. Huawei VRP: IS-IS and OSPFv3; with compression, only 32-bit C-SIDs. Source: Huawei NetEngine 8000 V800R025C00 Configuration Guide: Segment Routing IPv6 configuration ↩

  193. FRRouting: isisd TI-LFA computes SR-MPLS repair paths only. Source: FRR 10.7.1 source: isisd/isis_lfa.c (TI-LFA builds MPLS label stacks) ↩

  194. Cisco IOS-XR: Earliest entry found: microloop avoidance with Flex-Algo on ASR 9000. Source: Cisco ASR 9000 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  195. Cisco IOS-XE: Cisco IOS XE 17: SRv6 microloop avoidance ↩

  196. Juniper Junos / Junos Evolved: Juniper Feature Explorer: IS-IS microloop avoidance for SRv6 ↩

  197. Nokia SR OS: First documented in 26.3. Source: Nokia SR OS 26.3 Segment Routing and PCE User Guide: SRv6 ↩

  198. FRRouting: FRR 10.7.1 isisd documentation: fast reroute (LFA, Remote LFA, TI-LFA) ↩

  199. Cisco IOS-XR: Up to 8 locators, algorithms 128-255. Source: Cisco NCS 5500 Segment Routing Configuration Guide 24.x: Configure SRv6 Micro-SID ↩

  200. Cisco IOS-XE: Up to 8 algorithms, single IS-IS level. Source: Cisco IOS XE 17: SRv6 Flex-Algo with TI-LFA and microloop avoidance ↩

  201. Juniper Junos / Junos Evolved: uSID 23.4R1. One Flex-Algo definition covers SR-MPLS and SRv6. Source: Junos OS 20.3 In Focus Guide ↩

  202. Arista EOS: 7280R4 and 7800R4 series only. Source: Arista EOS 4.36.2F User Manual: IS-IS (Configuring SRv6 for IS-IS) ↩

  203. Nokia SR OS: Nokia Advanced Configuration Guide: SRv6 Flex-Algo for VPRN ↩

  204. FRRouting: isisd rejects SRv6 Flex-Algo as not yet supported. Source: FRR 10.7.1 source: isis_nb_config.c (SRv6 Flex-Algo not yet supported) ↩

  205. Cisco IOS-XR: Tree-SID is SR-MPLS only: SRv6 Tree-SID and SRv6 P2MP policies are listed as not supported. Source: Cisco 8000 Segment Routing Configuration Guide 26.x: Tree-SID; Cisco NCS 5500 Segment Routing Configuration Guide 26.x: Tree-SID ↩

  206. Cisco IOS-XE: IPv4 MVPN ingress replication (End.DTMC4); no Tree-SID. Source: Cisco IOS XE 17: MVPN ingress replication over SRv6 ↩

  207. Nokia SR OS: Tree-SID SRv6 for NG-MVPN: static configuration, classic SIDs only, no protection. Source: Nokia SR OS 26.7 Multicast Guide: SR P2MP policy (Tree-SID SRv6) ↩

  208. Huawei VRP: Huawei documents BIERv6 for IPv6 multicast transport, not SRv6 replication segments. Source: Huawei NetEngine 8000 V800R025C00: BIERv6 configuration ↩

  209. FD.io VPP: Spray policies replicate at the headend; not RFC 9524. Source: FD.io VPP 26.06 docs: SR policies ↩

  210. Cisco IOS-XR: Cisco NCS 5500 Release Notes, IOS XR 6.6.1; Cisco 8000 SRv6 Configuration Guide: SRv6 OAM SID verification ↩

  211. Cisco IOS-XE: SRv6 OAM in 17.12.1a; ping srv6 / traceroute srv6 commands from 17.16.1a. Source: Cisco IOS XE 17 Segment Routing Configuration Guide: Segment Routing over IPv6 ↩

  212. Juniper Junos / Junos Evolved: ping srv6 21.3R1; traceroute srv6 22.3R1. Source: Juniper: ping srv6 ↩

  213. Arista EOS: The target uN prefix must be configured on a loopback. Source: Arista EOS 4.36.2F User Manual: Segment Routing over IPv6 ↩

  214. Nokia SR OS: Nokia SR OS 26.7 OAM and Diagnostics Guide ↩

  215. Cisco IOS-XR: Delay over SRv6 on Cisco 8000 in 7.4.1; SR policy liveness over SRv6 from 7.11.1. Source: Cisco 8000 Segment Routing Configuration Guide 24.x: Performance Measurement ↩

  216. Juniper Junos / Junos Evolved: TWAMP probes over SRv6 segment lists on PTX 24.4R1; MX 25.4R1. Source: Junos 25.4R1 release notes: segment routing features ↩

  217. Huawei VRP: IFIT (alternate marking) on SRv6 paths; the STAMP and TWAMP Light chapters do not cover SRv6. Source: Huawei NetEngine 8000 V800R025C00: IFIT configuration ↩

  218. FD.io VPP: SRv6 Path Tracing, not STAMP or TWAMP. Source: VPP 22.10 release notes ↩

  219. Nokia SR OS: No RFC 9433 behaviors in the SRv6 chapter or the standards list. Source: Nokia SR OS 26.7 Standards and protocol support ↩

  220. Linux kernel: No RFC 9433 behaviors as of 7.3. Source: Linux v7.3 seg6_local.c: action table ↩

  221. FD.io VPP: srv6-mobile plugin: GTP-U behaviors, no End.MAP. Source: FD.io VPP 26.06 docs: SRv6 mobile plugin; VPP 20.01 release notes ↩