New and Changed Security Features

System Security Features Added or Modified in IOS XR Release 7.4.x

Feature Description Changed in Release Where Documented

Admin Access for NETCONF and gRPC Sessions

This feature was introduced.

Release 7.4.1

Admin Access for NETCONF and gRPC Sessions

Hold-Down Timer for TACACS+

This feature was introduced.

Release 7.4.1

Hold-Down Timer for TACACS+

NETCONF Access Control Model (NACM) for Protocol Operations and Authorization

NACM prefer-external and only-external keywords are introduced.

Release 7.4.1

Model-based AAA