D-Link DXS-3400 Emulator - Page 808
qcn cp
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DXS-3400 Series Lite Layer 3 Stackable 10GbE Managed Switch CLI Reference Guide auto comp comp any admin auto Controlled by the LLDP Congestion Notification TLV. admin-defense-mode (global) Controlled by the LLDP Congestion Notification TLV. Controlled automatically (*). alternate-priority (global) Controlled automatically (*). (*) The rule to automatically determine the alternate priority: An integer indicating the next lower priority value than this CNPV that is not a CNPV in an end station or bridge component, or the next higher non-CNPV, if all lower values are CNPVs. For example, to administratively deactivate the CNPV on the specified interface: • Use the qcn cnpv interface configuration command with the optional parameter defense-mode-choice to set the defense mode choice to admin. • Use the optional parameter admin-defense-mode with the argument disable. When a queue ID is used for a CNPV the switch will attach a Congestion Point (CP) on the corresponding outbound queue for each port. When you set the defense mode to disabled for a CNPV on an interface, it probably causes the congestion detection at the corresponding outbound queue on this interface be disabled. In other words, the switch will disable the interface's corresponding CP function when this interface has no active (non-disabled) CNPV mapped to that queue ID. For example, if a CNPV is only enabled on a single interface and no other active (non-disabled) CNPVs use the same queue ID, it implies the corresponding CPs on other egress ports are inactive then no CNMs can be triggered for the incoming traffic from this single enabled interface. To make the Congestion Notification Domain (CND) work correctly you need enable a CNPV on more than one interface. The command only takes effect when the QCN is enabled globally. Example This example shows how to administratively assign the defense mode to interior for CNPV 2 at ethernet 1/0/1. Switch# configure terminal Switch(config)# interface ethernet 1/0/1 Switch(config-if)# qcn cnpv 2 defense-mode-choice admin Switch(config-if)# qcn cnpv 2 admin-defense-mode interior Switch(config-if)# 83-6 qcn cp This command is used to configure the settings of the CP. qcn cp CP-QID {set-point QSP-VALUE | weight WEIGHT-VALUE | sample-base SAMPLE-BASE-VALUE | min-header-octets MIN-HEADER-VALUE} Parameters CP-QID set-point QSP-VALUE weight CPWEIGHT-VALUE sample-base Specifies the queue ID that the Congestion Point (CP) is attached to. 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. Specifies the set point (cpQSp) in octets for the queue managed by this CP. Congestion Notification Messages are transmitted to the sources of the frames queued in this CP's queue in order to keep the total number of octets stored in the queue at this set point. The valid set point range is from 100 to 4294967295. Specifies the weight change in the queue length in the calculation of the cpFb which is used to determine the value of the Quantized Feedback. The weight cpW is equal to two to the power of this value. Thus, setting the variable to -1, means the cpW is equal to a half. The valid weight range is from -10 to 10. Specifies the minimum number of octets to queue in the CP's queue between 804
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