Dell PowerSwitch S4128F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 1195

Parameters headroom-buffer-size - Enter the size of the priority flow-control headroom buffer in KB, from 1 to 3399. Default 1024 KB Command Mode SYSTEM-QOS Usage Information All PFC-enabled priority groups can use the shared headroom space. Headroom is the buffer space that absorbs the incoming packets after the PFC frames reach the sender. After the threshold is reached, PFC frames generate towards the sender. The packets sent by the sender after the PFC frames generate are absorbed into the Headroom buffer. The no version of this command returns the value to the default. Example OS10(conf-sys-qos)# pfc-shared-headroom-buffer-size 2000 Supported Releases 10.4.0E(R1) or later police Configures traffic policing on incoming traffic. Syntax Parameters police {cir committed-rate [bc committed-burst-size]} {pir peak-rate [be peakburst-size]} • cir committed-rate - Enter a committed rate value in kilo bits per second, from 0 to 4000000. • bc committed-burst-size - (Optional) Enter the committed burst size in packets for control plane policing and in KB for data packets, from 16 to 200000. • pir peak-rate - Enter a peak-rate value in kilo bits per second, from 0 to 40000000. • be peak-burst-size - (Optional) Enter a peak burst size in kilo bytes, from 16 to 200000. Defaults • bc committed-burst-size value is 200 KB for control plane and 100 KB for all other class-map types • be peak-burst-size value is 200 KB for control plane and 100 KB for all other class-map types Command Mode POLICY-MAP-CLASS-MAP Usage Information If you do not provide the peak-rate pir values, the committed-rate cir values are taken as the pir values. Only the ingress QoS policy type supports this command. For control-plane policing, the rate values are in pps. Example OS10(conf-pmap-c-qos)# police cir 5 bc 30 pir 20 be 40 Supported Releases 10.2.0E or later policy-map Enters QoS POLICY-MAP mode and creates or modifies a QoS policy-map. Syntax Parameters policy-map policy-map-name [type {qos | queuing | control-plane | application | network-qos }] • policy-map-name - Enter a class name for the policy-map. A maximum of 32 characters. • type - Enter the policy-map type. ○ qos - Create a qos policy-map type. ○ queuing - Create a queueing policy-map type. ○ control-plane - Create a control-plane policy-map type. ○ application - Create an application policy-map type. ○ network-qos - Create a network-qos policy-map type. Defaults Command Mode qos = class-map type and match-any = class-map filter CONFIGURATION Quality of service 1195