Is this a requirement for implementing Priority Flow Control (PFC) on an ArubaOS-CX switch interface? Solution: configuring a DCBX application priority on the interface

Question

Options

• AYes
• BNo

• A
  80% (43)
• B
  20% (11)

Explanation

Priority Flow Control (PFC) is a feature of ArubaOS-CX that eliminates packet loss due to congestion on a network link. PFC uses IEEE 802.1Qbb standard to pause traffic on a per-priority basis. PFC can be configured to operate in symmetric or asymmetric mode. Symmetric mode applies PFC to both the receiving and sending of pause frames. Asymmetric mode applies PFC to either the receiving or sending of pause frames. To configure PFC on an interface, you need to enable flow control with a priority value and configure a DCBX application priority on the interface. A DCBX application priority maps a traffic class to a priority group and enables the switch to negotiate PFC parameters with the peer device. Therefore, this is a requirement for implementing PFC on an ArubaOS-CX switch interface, and the correct answer is yes. For more information on PFC and DCBX, refer to the Aruba Data Center Network Specialist (ADCNS) certification datasheet2 and the QoS Guide for your switch model.

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