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Segment Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 7.5.x

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Updated:: April 29, 2022

Chapter: New and Changed Information for Segment Routing Features

New and Changed Information for Segment Routing Features
New and Changed Segment Routing Features

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 NCS 5500 Series Routers, and lists where they are documented.

New and Changed Segment Routing Features

Segment Routing Features Added or Modified in IOS XR Release 7.5.x


Feature	Description	Introduced/Changed in Release	Where Documented
SRv6-Services: EVPN ELAN Layer 2 Gateway With Automated Steering To Flexible Algorithm Paths	This feature is introduced.	Release 7.5.2	SRv6-Services: EVPN ELAN Layer 2 Gateway With Automated Steering To Flexible Algorithm Paths
SRv6 with Micro-Segment (uSID)	This feature is now supported on Cisco NCS 5700 series fixed port routers and the Cisco NCS 5500 series routers that have the Cisco NC57 line cards installed and operating in the native mode.	Release 7.5.2	Configure Segment Routing over IPv6 (SRv6) with Micro-SIDs
SRv6: Ultimate Segment Decapsulation (USD) on Full-length SIDs	This feature is introduced.	Release 7.5.2	SRv6 Endpoint Behavior Variants
Flexible Algorithm Prefix-SID Redistribution for External Route Propagation	This feature is modified.	Release 7.5.2	Flexible Algorithm Prefix-SID Redistribution
Flexible Algorithm to Exclude SRLGs for OSPF	This feature is modified.	Release 7.5.2	Flexible Algorithm with Exclude SRLG Constraint
BGP Best Path Computation using SR Policy Paths	This feature is introduced.	Release 7.5.2	BGP Best Path Computation using SR Policy Paths
Segment Routing over IPv6 (SRv6) with Full-Length SIDs	This feature is now supported on Cisco NCS 5700 series fixed port routers and the Cisco NCS 5500 series routers that have the Cisco NC57 line cards installed and operating in the native mode.	Release 7.5.1	Configure Segment Routing over IPv6 (SRv6) with Full-Length SIDs
Per-Prefix SRv6 Locator Assignment	This feature is introduced.	Release 7.5.1	SRv6 Services: IPv4 L3VPN
Support for iBGP as PE-CE protocol	This feature is introduced.	Release 7.5.1	SRv6 Services: IPv4 L3VPN
BGP Route Leaking	This feature is introduced.	Release 7.5.1	SRv6 Services: IPv4 L3VPN
IS-IS Flexible Algorithm: Exclude-SRLG Constraint	This feature is introduced.	Release 7.5.1	Flexible Algorithm with Exclude SRLG Constraint
Prefix Metric support for OSPF Flexible Algorithm	This feature is introduced.	Release 7.5.1	Flexible Algorithm Prefix Metric
SR-PCE: Stateful North-Bound API for Tree-SID	This feature is introduced.	Release 7.5.1	Configuring the North-Bound API on SR-PCE
SR-PCE: Single PCE scale enhancement	This enhancement is introduced.	Release 7.5.1	Configure Segment Routing Path Computation Element

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