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You are configuring Ethernet Ring Protection Switching (ERPS) on an ArubaOS-CX switch. Is this a guideline for configuring timers? Solution: The guard interval is set in units of 10 ms and should exceed the maximum expected delay for forwarding a frame around the complete ring.
Correct Answer: A
ERPS is a feature of ArubaOS-CX that prevents loops at layer 2 on ring networks. ERPS uses a protocol called Ring Auto Protection Switching (RAPS) to detect link failures and perform fast traffic switchover. ERPS has two timers that control the protection switching mechanism: guard timer and hold off timer. The guard timer prevents false switching caused by delayed or lost RAPS PDUs. The guard interval is set in units of 10 ms and should exceed the maximum expected delay for forwarding a frame around the complete ring. This ensures that all switches on the ring receive the RAPS PDUs before the guard timer expires. Therefore, this is a guideline for configuring timers for ERPS, and the correct answer is yes. For more information on ERPS and timers, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet2 and the ERPS Guide for your switch model.
