On Cisco IOS XR devices, which action improves failure reaction for Link OAM when Path Isolation with Ethernet Failure Detection is used?
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A. B. C. D.A.
On Cisco IOS XR devices, Link OAM (Operations, Administration, and Maintenance) is used for monitoring and managing Ethernet links. Path Isolation with Ethernet Failure Detection is a feature that provides an end-to-end Layer 2 link protection mechanism by detecting failures in the Ethernet path.
In order to improve the failure reaction for Link OAM when Path Isolation with Ethernet Failure Detection is used, the appropriate action would be to trigger port suspend when heartbeat is lost. This is option D in the provided answers.
When the heartbeat is lost, it indicates a failure in the Ethernet path. Triggering a port suspend ensures that traffic is not sent or received on that port until the issue is resolved. This helps to prevent further network problems or service disruptions.
Option A, bringing down the line protocol interface state when a problem is detected, does not improve failure reaction for Link OAM with Path Isolation with Ethernet Failure Detection. This action only disables the interface and does not provide any mechanism to resolve the underlying issue.
Option B, closing the gap when UDLD (UniDirectional Link Detection) detects that Ethernet ports are miswired, also does not improve failure reaction for Link OAM with Path Isolation with Ethernet Failure Detection. UDLD is used to detect and disable unidirectional links, not to detect Ethernet path failures.
Option C, changing the interface status to error-disable operating at Layer 1, is also not the correct action for improving failure reaction for Link OAM with Path Isolation with Ethernet Failure Detection. This action only disables the interface at Layer 1 and does not provide any mechanism to resolve the underlying issue.
Therefore, option D, triggering port suspend when heartbeat is lost, is the most appropriate action for improving failure reaction for Link OAM when Path Isolation with Ethernet Failure Detection is used on Cisco IOS XR devices.