Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 746
portCfgQoS
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portCfgQoS portCfgQoS Enables or disables QoS, sets the default configuration, and sets and resets the ingress rate limit. Synopsis portcfgqos --disable | --enable [slot/]port portcfgqos --setratelimit [slot/]port ratelimit portcfgqos --resetratelimit [slot/]port portcfgqos --enable | --disable [slot/]port[-port] csctl_mode portcfgqos --default [slot/]port portcfgqos --help Description Use this command to configure traffic prioritization on a port. Two alternate modes of traffic prioritization are supported by this command: Adaptive Networking/Quality of Service (AN/QoS) or Class-Specific Control (CS_CTL): • The Adaptive Networking with QoS feature allows latency-sensitive applications to share storage resources alongside throughput-intensive applications. You can enable or disable Adaptive Networking/Quality of Service (AN/QoS) on a port, set or reset the ingress rate limit for the specified port, and set the default behavior. Ingress Rate Limiting delays the return of BB credits to the external device. By limiting the throughput on the ingress side of a port, existing congestion can be removed or avoided. • In Fabric OS v7.0.0 and later, an alternate method of traffic flow prioritization based on the CS_CTL bits of a Fibre Channel frame is provided through this command. This feature uses the value of the CS_CTL bit of the frame to determine the virtual channel (VC), so each frame can be prioritized based on the value of the CS_CTL bit. CS_CTL flow prioritization is independent of traffic prioritization based on QoS zones; and both methods are mutually exclusive. If CS_CTL VC mode is enabled on an F/FL_Port, QoS-based traffic flow prioritization cannot be used between any two devices connected to these F/FL_Ports in that fabric and vice versa. If both QoS-based and CS_CTL-based traffic prioritization are enabled on the same F/FL_Port, the CS_CTL-based method takes priority over the QoS zones. When QoS is enabled on an F/FL_Port and you enable CS_CTL VC mode on the same port, the command displays a message stating that QoS zones will lose priority to CS_CTL-based traffic prioritization. When you disable CS_CTL mode on a given F/FL port, the QoS zones, if already enabled, become the effective frame classification method for all devices connected to that F/FL_Port. On 16 Gbps-capable Inter Chassis Link (ICL) ports, QoS is not configurable and it is always enabled internally. Notes The execution of this command is subject to Virtual Fabric restrictions that may be in place. Refer to "Using Fabric OS Commands" and "Command Availability" for details. Enabling and disabling QOS is potentially disruptive to the I/O on the affected port. This command is not supported on all platforms. Refer to the Fabric OS Administrator's Guide for more information. The configuration changes effected by this command are persistent across system reboots. 722 Brocade Fabric OS Command Reference 53-1004112-02
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