Example Configuration - Cisco DS-X9530-SF1-K9 - Supervisor-1 Module - Control Processor Configuration Manual

Data Traffic
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .

Example Configuration

This section describes a configuration example for the application illustrated in
Figure 47-3
OLTP server
Backup server
21:00:00:0c:50:02:c7:ff
Both the OLTP server and the backup server are accessing the disk. The backup server is writing large
amounts of data to the disk. This data does not require specific service guarantees. The volumes of data
generated by the OLTP server to the disk are comparatively much lower but this traffic requires faster
response because transaction processing is a low latency application.
The point of congestion is the link between Switch 2 and the disk, for traffic from the switch to the disk.
The return path is largely uncongested as there is little backup traffic on this path.
Service differentiation is needed at Switch 2 to prioritize the OLTP-server-to-disk traffic higher than the
backup-server-to-disk traffic.
To configure traffic prioritization for the example application, follow these steps:
Step 1 Create the class maps.
Switch 2# config t
Switch 2(config)# qos class-map jc1 match-all
Switch 2(config-cmap)# match source-wwn 21:00:00:0c:50:02:ca:b5
Switch 2(config-cmap)# match destination-wwn 22:00:00:04:cf:22:eb:dc
Switch 2(config-cmap)# exit
Switch 2(config)# qos class-map jc2 match-all
Switch 2(config-cmap)# match source-wwn 21:00:00:0c:50:02:c7:ff
Switch 2(config-cmap)# match destination-wwn 22:00:00:04:cf:22:eb:dc
Switch 2(config-cmap)# exit
Switch 2(config)#
Step 2 Create the policy map.
Switch 2(config)# qos policy-map jp1
Switch 2(config-pmap)# class jc1
Switch 2(config-pmap-c)# priority high
Switch 2(config-pmap-c)# exit
Switch 2(config-pmap)# class jc2
Cisco MDS 9000 Family Configuration Guide
47-12
Example Application for Traffic Prioritization
21:00:00:0c:50:02:ca:b5
VOQ(s)
Absolute
High
Medium
Low
Switch 1
Chapter 47 Configuring Fabric Congestion Control and QoS
Disk
22:00:00:04:cf:22:eb:dc
FC FC
Congestion
VOQ(s)
Absolute
High
Medium
Low
Switch 2
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Figure 47-3.