Interface and Hardware Component Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 26.1.x, 26.2.x

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Updated:: June 9, 2026

Chapter: New and Changed Feature Information

New and Changed Feature Information
Interface and hardware component features added or modified in IOS XR Release 26.x.x

New and Changed Feature Information

This table summarizes the new and changed feature information for the Interface and Hardware Component Configuration Guide for Cisco NCS 5500 Series Routers, and tells you where they are documented.

Interface and hardware component features added or modified in IOS XR Release 26.x.x

Table 1. New and Changed Features
Feature	Description	Introduced in Release	Where Documented
Link flap err-disables	This feature is introduced.	Release 26.2.1	Link flap err-disables
Support for DP04QSDD-LLH-A1 optical module	This feature is introduced.	Release 26.2.1	Configuring 400G Digital Coherent Optics
Extended Support for DP04QSDD-ULH optical module	This feature is modified.	Release 26.2.1	Configuring 400G Digital Coherent Optics

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