Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 599
pfc-cos, pfc-max-buffer-size
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pfc-cos Configures priority flow-control for cost of service (CoS). Syntax pfc-cos cos-value Parameters cos-value - Enter a single, comma-delimited, or hyphenated range of CoS values for priority flow-control to enable (0 to 7). Default Not configured Command Mode POLICY-MAP-CLASS-MAP Usage Information To configure link-level flow-control, do not configure pfc-cos for the matched class for this policy. Add the policy-map with the pfc-cos configuration to system-qos to service an input to enable priority flow-control behavior on all ports, based on a per-port priority flow-control enable mode. Add the policy-map with the pfccos configuration to interface configurations to service at input to enable priority flow-control on that particular port, based on the port's priority flow-control enable mode. If you configure 40G to 10G mode on interfaces and pause (no drop) is enabled on system-qos, all queues may or may not drop traffic based on the availability of buffers. The no version of this command returns the value to the default. Example OS10(conf-pmap-c-nqos)# pfc-cos 0-2 Example (global buffer/shared buffer) OS10(config)# policy-map type network-qos nqGlobalpolicy1 OS10(conf-cmap-nqos)# class CLASS-NAME OS10(conf-cmap-nqos-c)# pause buffer-size 45 pause-threshold 25 resumethreshold 10 OS10(conf-cmap-nqos-c)# pfc-cos 0-2 OS10(conf-cmap-nqos-c)# queue-limit 140 Supported Releases 10.3.0E or later pfc-max-buffer-size Configures the maximum buffer size for the priority flow-control enabled flows. Syntax pfc-max-buffer-size max-buffer-size Parameters max-buffer-size - Enter the maximum buffer size in KB. Default None Command Mode SYSTEM-QOS Usage Information This command configures maximum size of the lossless buffer pool.. The no version of this command removes the maximum buffer size limit. Example OS10(config-sys-qos)# pfc-max-buffer-size 2000 Supported Releases 10.4.0E(R1) or later Quality of service 599