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
H2
= Low priority
= Medium priority
= High priority
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 1
1
3
15
16
Domain 2
Domain 3
9
14
12
13
8
7
Domain 4
Fabric OS 6.1.x administrator guide 307
S1
S2
S3