Cisco NCS 55A1 IOS XR 24.3 K9 R-PHY Aggregation Image

Operate a Cisco NCS 55A1 router with the Cisco IOS XR 24.3 K9 software image specified for R-PHY aggregation. XR-NC55A1R-K9-24.3 aligns the operating-system release with that router platform and application role rather than providing a general image for unspecified Cisco hardware. It is software for the router operating environment, not a router chassis, interface module, or physical accessory. Release 24.3 is part of the exact image selection. The image is intended for NCS 55A1 systems serving an R-PHY aggregation function, where the router platform and IOS XR release must correspond to the deployed network role. The K9 designation is also part of the image name and distinguishes this release designation from similarly named IOS XR software selections. Use this image where the installed platform is specifically an NCS 55A1 and the required software role is R-PHY aggregation. The platform association is the key distinction: router software images are platform-specific, and an image selected for another hardware family does not establish NCS 55A1 support. Keeping the complete release and K9 designation intact helps distinguish this operating-system image from hardware products and from IOS XR releases intended for different router platforms or roles.