What is the root cause of this issue?

Posted by: Pdfprep Category: 400-201 Tags: , ,

An engineer deploys a new Cisco IOS XR router and connects a Gigbit Ethernet port to an existing Cisco Catalyst 3650 Series Switch. The engineer uses known good optics and fiber, but the link has not come up and it is stuck in the down/down state.

What is the root cause of this issue?
A . Cisco IOS XR devices must use copper connections to Catalyst 3650 Series Switches
B . UDLD must be enabled on the Catalyst 3650 Series switch
C . CDP is not enabled on the Cisco IOS XR device
D . Auto negation must be disabled on the Catalyst 3650 Series Switch

Answer: D

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