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Segment Routing Configuration Guide for Cisco 8000 Series Routers, IOS XR Release 24.1.x, 24.2.x, 24.3.x, 24.4.x

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Updated:: October 28, 2025

Chapter: New and Changed Information for Segment Routing Features

New and Changed Information for Segment Routing Features
New and Changed Segment Routing Features-24.x.x

New and Changed Information for Segment Routing Features

This table summarizes the new and changed feature information for the Segment Routing Configuration Guide for Cisco 8000 Series Routers, and lists where they are documented.

New and Changed Segment Routing Features-24.x.x

Segment Routing Features Added or Modified in IOS XR Release 24.x.x


Feature	Description	Changed in Release	Where Documented
Flexible algorithm with bandwidth optimization	This feature is introduced.	Release 24.4.1	Flexible algorithm with bandwidth optimization
SR-TE policy with enhanced flexible algorithm metric types	This feature is introduced.	Release 24.4.1	SR-TE policy with enhanced flexible algorithm metric types
Segment routing Tree-SID interoperability and SR-P2MP enhancements	This feature is introduced.	Release 24.4.1	Segment routing Tree-SID interoperability and SR-P2MP enhancements
Delay and synthetic loss measurement for GRE tunnel interfaces	This feature is introduced.	Release 24.4.1	Delay and synthetic loss measurement for GRE tunnel interfaces
Fallback delay advertisement	This feature is introduced.	Release 24.4.1	Fallback delay advertisement
Far-end delay metrics in one-way measurement mode	This feature is introduced.	Release 24.4.1	Measurement Modes
SRv6 services: EVPN E-Line support	This feature is introduced.	Release 24.4.1	SRv6 services on EVPN E-Line
SRv6 Services on EVPN E-Line	This feature is introduced.	Release 24.3.1	SRv6 services on EVPN E-Line
Data Plane Validation for SR-MPLS IPv6-based Controller Instantiated LSPs	This feature is introduced.	Release 24.2.11	Data Plane Validation Support for SR-MPLS IPv6-based LSPs
Overriding MPLS Imposition (IP-to-MPLS) via Service Layer API (SL-API)	This feature is introduced.	Release 24.2.11	Overriding MPLS Imposition (IP-to-MPLS) via Service Layer API (SL-API)
MPLS OAM support for SR-TE Policies using MPLS IPv6-based LSPs	This feature is introduced.	Release 24.2.11	MPLS OAM support for SR-TE Policies using IPv6-based LSPs
User-Defined Generic Metric Support for IS-IS Flex Algo	This feature is introduced.	Release 24.2.11	User-Defined Generic Metric Support for IS-IS Flex Algo
Synthetic Loss Measurement	This feature is introduced.	Release 24.1.1	Synthetic Loss Measurement
SR-MPLSv6 Traffic Engineering	This feature is introduced.	Release 24.1.1	SR Policy Path Computation for IPv6
Exclude Network Resources during Path Computation over SR-TE Policies	This feature is introduced.	Release 24.1.1	Exclude Network Resources during Path Computation over SR-TE Policies
Configure the Shortest Path for Disjoint Candidate Paths	This feature is introduced.	Release 24.1.1	Configure the Shortest Path for Disjoint Candidate Paths
Enable Strict Disjointness for SR-TE policies in the PCE	This feature is introduced.	Release 24.1.1	Enable Strict Disjointness for SR-TE policies in the PCE

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