Ethernet 1/1 is assigned IP address 10.1.1.1 with subnet mask 255.255.255.0. Which configuration is used to configure EIGRP on a Cisco Nexus 7000 switch?

Enabling only 'feature eigrp' without configuring the router process and autonomous-system number is incomplete and will not activate EIGRP routing on any interfaces.

On Cisco NX-OS, EIGRP must first be activated using 'feature eigrp' before any routing configuration is accepted. Unlike traditional IOS where the AS number is part of the 'router eigrp' command, NX-OS requires a separate 'autonomous-system' statement under the router process, making the complete and correct configuration: 'feature eigrp', then 'router eigrp 1', then 'autonomous-system 1'.

Configuring 'router eigrp 1' with 'autonomous-system 1' without first running 'feature eigrp' will fail on NX-OS, as the feature must be explicitly enabled before its configuration commands are available.

Like choice A, this option only enables the EIGRP feature process without the required router process and autonomous-system configuration, leaving EIGRP non-functional.