HP 8/80 Fabric OS Administrator's Guide v6.4.0 (53-1001763-01, June 2010) - Page 447

18 QoS zones For example, Figure 61 shows a fabric with two hosts (H1, H2) and three targets (S1, S2, S3). The traffic prioritization is as follows: • 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 61 QoS traffic prioritization Domain 4 For this fabric, you could set up the following QoS zones: QOSH_Zone1 Members: H1, S1 QOSL_Zone3 Members: H1, H2, S3 QoS on E_Ports In addition to configuring the hosts and targets in a zone, you must also enable QoS on individual E_Ports that might carry traffic between the host and target pairs. Path selection between the "host,target" pairs is governed by FSPF rules and is not affected by QoS priorities. For example, in Figure 62, QoS should be enabled on the encircled E_Ports. NOTE By default, QoS is enabled on 8 Gbps ports, except for long-distance 8 Gbps ports. QoS is disabled by default on all 4 Gbps ports and long-distance 8 Gbps ports. Fabric OS Administrator's Guide 407 53-1001763-01