HP A7533A HP StorageWorks Fabric OS 6.1.1 administrator guide (5697-0235, Dece - Page 307

NOTE: QoS can be used for device pairs that exist within the same fabric only. QoS priority information is not passed over EX_ or VEX_Ports and should not be used for devices in separate fabrics. If a QoS zone name prefix is specified in an LSAN zone (a zone beginning with prefix LSAN_), the QoS tag is ignored. Only the first prefix in a zone name is recognized. For example, a zone with the name LSAN_QOSH_zone1 is recognized as an LSAN zone and not as QoS zone. For example, Figure 35 shows a fabric with two hosts (H1, H2) and three targets (S1, S2, S3). The traffic prioritization is: • Traffic between H1 and S1 is high priority. • Traffic between H1 and S3 and between H2 and S3 is low priority. • All other traffic is medium priority, which is the default. H1 Domain 1 Domain 3 S1 1 9 H2 14 3 13 12 S2 15 = Low priority 87 = Medium priority = High priority 16 S3 Domain 2 Figure 35 QoS traffic prioritization For this fabric, you could set up the following QoS zones: • QOSH_Zone1 Members: H1, S1 • QOSL_Zone3 Members: H1, H2, S3 Domain 4 Fabric OS 6.1.x administrator guide 307