HP StorageWorks 8/80 HP StorageWorks Fabric OS 6.2 administrator guide (5697-0 - Page 363

Disabling ingress rate limiting 1. Connect to the switch and log in as admin. 2. Enter the portCfgQos --resetratelimit command. portcfgqos --resetratelimit slot/port where: slot/port The slot and port number of the F_Port or FL_Port for which you want to disable ingress rate limiting. For example, to disable ingress rate limiting on slot 3, port 9, enter the following command: portcfgqos --resetratelimit 3/9 QoS: SID/DID traffic prioritization SID/DID traffic prioritization is a licensed feature that allows you to categorize the traffic flow between a given host and target as having a high or low priority. For example, you could assign online transaction processing (OLTP) to high priority and backup traffic to low priority. All flows without QoS prioritization are considered medium priority. High, medium, and low priority flows are allocated to different virtual channels (VCs). High priority flows receive more VCs than medium priority flows, which receive more VCs than low priority flows. The virtual channels are allocated as shown in Table 76. Table 76 Virtual channels assigned to QoS priority Priority Number of VCs VCs assigned High priority 5 Medium priority 4 10-14 2-5 Low priority 2 8, 9 NOTE: If there is a single low priority flow to a destination ID (DID) and several medium priority flows to that same DID, it is possible that the medium priority flows would have less bandwidth because they have to share the medium priority VCs, whereas the low priority flow would have a separate VC. IMPORTANT: SID/DID traffic prioritization is a licensed feature. An Adaptive Networking license must be installed on every switch that is in the path between a given configured device pair. QoS zones You assign high or low priority (QoS level) using a QoS zone, a special zone that indicates the priority of the traffic flow between a given host/target pair. The members of a QoS zone are WWNs of the host/target pairs. QoS zones can contain only WWN members (WWNN or WWPN). Domain,Index zoning is not supported. A QoS zone has a special naming convertion, to differentiate it from a regular zone. The format of the QoS zone name is as follows: QOSp_xxxxxx where p is the priority level (High or Low) and xxxxxx is the user-defined portion of the name. For example, the following are valid QoS zone names: QOSH_HighPriorityTraffic QOSL_LowPriorityZone Fabric OS 6.2 administrator guide 361