H12-831_V1.0 Exam Dumps : HCIP-Datacom-Advanced Routing & Switching Technology V1.0

A Layer 2 loop occurs when Ethernet frames circulate repeatedly through redundant switching paths without an effective loop-prevention mechanism.

Because Ethernet frames do not contain a TTL field equivalent to that used in IP packets, broadcast and unknown-unicast frames may continue circulating and multiplying.

This behaviour can create broadcast storms, causing excessive interface bandwidth utilization.

The resulting traffic volume can also overload the switch CPU, especially when large quantities of protocol or control packets are processed.

High CPU utilization can prevent administrators from logging in or cause the device to respond slowly to management operations.

Additionally, service interface indicators may blink unusually frequently because of the sustained traffic volume.

All four symptoms are consistent with Layer 2 loops. Huawei ' s troubleshooting documentation identifies these symptoms as indicators of switching loops.

Huawei network devices provide several information-management mechanisms, including logs, traps, debugging information, and SNMP management data.

Log information is the appropriate starting point when investigating a configuration change made by an administrator.

Depending on the device software version and enabled logging functions, configuration-operation logs may record commands executed by administrators, including IP address modifications and deletions.

The administrator can examine available logs using commands such as display logbuffer or investigate saved log files.

SNMP agent information primarily provides information used by management systems. Trap messages normally report significant events or state changes, while debugging information provides detailed protocol or system diagnostics.

Neither traps nor debugging output is the primary source for reconstructing an accidental configuration change.

Therefore, option C is correct. Recovering the exact deleted address depends on whether the relevant configuration-operation records were retained.

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