Cisco Updated 350-401 Exam Questions and Answers by katherine

 The correct configuration to enable a login authentication method that allows a user to log in using local authentication if all other defined authentication methods fail is option C. This configuration uses the AAA (Authentication, Authorization, and Accounting) framework to define a login authentication method named CONSOLE. The method list specifies that the router should first attempt to authenticate users against the group of RADIUS servers defined under ‘radius’. If the RADIUS servers are unreachable or unable to authenticate the user, the router will then fall back to local authentication. The ‘enable’ keyword at the end of the command is not part of the AAA method list syntax and is likely included to indicate that this authentication method should be enabled on the console line.

 In an SD-Access deployment, a fabric edge node is responsible for connecting endpoints, such as user devices, to the network fabric. It plays a crucial role in forwarding their traffic within the fabric. The fabric edge node ensures that the endpoints can communicate with the rest of the network by encapsulating and de-encapsulating the user traffic into the appropriate network protocols as it enters and exits the fabric.

 The debugging output indicates an issue with IS-IS level configuration on interfaces attempting to form an adjacency. For IS-IS adjacencies to form correctly, both interfaces must operate at the same level or be configured to support multi-level (Level-1-2). If one router’s interface is set to Level 1 only while another’s is set to Level 2 only, they will not form an adjacency because they are operating at different levels of the IS-IS hierarchy. References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) v1.1

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