HP StorageWorks Fabric OS 6.x administrator guide (5697-7344, March 2008)

342 Optimizing fabric behavior
QoS zones
You assign high or low priority (QoS level) using a QoS zone. A QoS zone is 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. “Domain,Index” zoning is not
supported.
A QoS zone has a special name, 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
The switch automatically sets the priority for the “host,target” pairs specified in the zones based on the
priority level in the zone name.
For example, Figure 25 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.
Figure 25 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
7
12
3
14
15
16
8
13
Domain 1 Domain 3
Domain 4
Domain 2
H1
19
S3
S2
S1
H2
= High priority
= Medium priority
= Low priority