D-Link DXS-3600-32S CLI Guide - Page 445
show interface priority-flow-control
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Usage Guideline DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide Priority-based Flow Control (PFC), which is defined in the IEEE 802.1Qbb standard, extends the basic IEEE 802.3x PAUSE semantics and uses the IEEE 802.1p CoS values in the IEEE 802.1Q VLAN tag to differentiate up to eight CoSs that can be subject to flow control independently. The following is a procedure to enable PFC on a priority basis. 1. Use class-map type network-qos global configuration command to create a type network-qos class map. a. Use match cos class-map configuration command to specify which priorities you want to configure. 2. Use policy map type network-qos to create a type network-qos policy map. a. Use the class type network-qos policy-map configuration command to specify a type network-qos class map to be associated with a traffic policy. b. Use pause policy map type network-qos class configuration command to enable PFC pause characteristics on a class referenced in a type network-qos policy map. 3. Use service-policy interface configuration command to apply a type network-qos policy map. If PFC of all priorities is disabled on an interface, the interface defaults to the IEEE 802.3x flow control setting. When PFC of any priority is enabled, the interface will pause a CoS on which PFC is enabled and a pause frame for that CoS is received. Meanwhile, a pause frame will be transmitted if the congestion is detected on the PFC enabled CoS. This command is used to turn on the Priority Flow Control (PFC) willing feature. When enabled, the system will use Data Center Bridging Exchange (DCBX) to detect remote systems and accept a PFC configuration from them. You need enable the Switch to transmit LLDP DCBX PFC TLV to advertise the PFC setting of per-CoS and negotiated with the peer to take the PFC willing (on) into effect. The Priority-based flow control configured applies to all member interfaces if the port is member port of a Port group. Example This example shows how to turn on the DCBX PFC willing bit on interface 1/1/1. DXS-3600-32S#configure terminal DXS-3600-32S(config)#interface gigabitEthernet 1/1/1 DXS-3600-32S(config-if)# priority-flow-control willing 45-3 show interface priority-flow-control This command is used to display Priority-based flow control information of interface. show interface [INTERFACE-ID [, | -]] priority-flow-control Parameters INTERFACE-ID , - (Optional) Specifies that a valid interface is a physical interface. (Optional) Specifies a series of interfaces, or separate a range of interfaces from a previous range. No space before and after the comma. (Optional) Specifies a range of interfaces. No space before and after the hyphen. Default Command Mode Command Default Level Usage Guideline None. EXEC Mode. Level: 3. Use this command to display the PFC information on the specified interfaces. 437