D-Link DXS-3400 Emulator - Page 809

DXS-3400 Series Lite Layer 3 Stackable 10GbE Managed Switch CLI Reference Guide SAMPLEBASE-VALUE min-header-octets MINHEADER-VALUE transmissions of CNMs. The valid sample base range is from 10000 to 4294967295. Specifies the minimum number of octets to be returned in a CNM from the data frame that triggered transmission of the CNM. The valid range is from 0 to 64. Default The default set point for the queue is 26000 octets. The default feedback weight is 2 to the power of 1. The default sample base is 15000 octets. The default minimum header size is 0. Command Mode Interface Configuration Mode. Command Default Level Level: 12. Usage Guideline When a priority is assigned as a CNPV by the qcn cnpv global configuration mode command the switch will attach a CP on the corresponding outbound queue for each port. Which queue the CP is attached to depends on CoS mapping. Because the relation between the queue ID and CP is one-to-one, the CP is specified by the queue ID to which the CP is attached to. Use the qcn cp command to configure the parameters for the CP. Specify a queue ID on which no CP is attached. If the queue is not used by any CNPV, the configuration won't take effect. The CP monitors the transmission queue at the egress port. When you set the defense mode to disabled for a CNPV on an interface and no other active (non-disabled) CNPVs uses the same queue ID, the corresponding CP on that interface will be disabled. That is no CNM can be triggered at this outbound queue. Use this command to configure the set point (cpQSp) and weight (cpW) which play roles in the calculation of the cpFb which is used to determine the value of the Quantized Feedback. The Quantized Feedback (6-bit) is a field of a CNM and indicates the degree of congestion. In other words, the cpFb has two terms. The first term is the difference between the current and the desired queue lengths. The second is a weight factor cpW times the difference between the current and the previous queue lengths (cpQDelta). Thus, a multiple of the first derivative of the queue size is subtracted from the current nonoptimality of the queue, so that if the queue length is moving toward the set point cpQSp, the cpFb will be closer to 0 than if the queue length is moving away from the cpQSp. Use this command to configure the CP's settings in the interface configuration mode. This command only takes effect when the QCN is enabled globally. Example This example shows how to configure the CP for ethernet 1/0/1. Switch# configure terminal Switch(config)# interface ethernet 1/0/1 Switch(config-if)# qcn cp 1 set-point 30000 Switch(config-if)# qcn cp 1 weight 1 Switch(config-if)# qcn cp 1 sample-base 160000 Switch(config-if)# qcn cp 1 min-header-octets 10 Switch(config-if)# 805