HP Cisco MDS 9020 - Fabric Switch Configuration Manual page 1321
Cisco mds 9000 family cli configuration guide, release 3.x (ol-16184-01, april 2008)
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Also See for Cisco MDS 9020 - Fabric Switch:
- Service manual (242 pages) ,
- Configuration manual (1384 pages) ,
- Handbook (141 pages)
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Chapter 56
Configuring Fabric Congestion Control and QoS
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
Create the class maps.
Step 1
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
Switch 2(config-pmap-c)# priority low
Switch 2(config-pmap-c)# exit
Switch 2(config-pmap)# exit
Switch 2(config)#
Assign the service policy.
Step 3
Switch 2(config)# qos service policy jp1 vsan 1
Assign the weights for the DWRR queues.
Step 4
Switch 2(config)# qos dwrr-q high weight 50
Switch 2(config)# qos dwrr-q medium weight 30
Switch 2(config)# qos dwrr-q low weight 20
Repeat
Step 5
Congestion could occur anywhere in the example configuration. To address congestion of the return path
at both switches, you need to create two more class maps and include them in the policy map as follows:
Create two more class maps.
Step 1
Switch 2(config)# qos class-map jc3 match-all
Switch 2(config-cmap)# match source-wwn 22:00:00:04:cf:22:eb:dc
Switch 2(config-cmap)# match destination-wwn 21:00:00:0c:50:02:ca:b5
Switch 2(config-cmap)# exit
Switch 2(config)# qos class-map jc4 match-all
Switch 2(config-cmap)# match source-wwn 22:00:00:04:cf:22:eb:dc
Switch 2(config-cmap)# match destination-wwn 21:00:00:0c:50:02:c7:ff
Switch 2(config-cmap)# exit
Switch 2(config)#
Assign the class maps to the policy map.
Step 2
Switch 2(config)# qos policy-map jp1
Switch 2(config-pmap)# class jc3
Switch 2(config-pmap-c)# priority high
Switch 2(config-pmap-c)# exit
Switch 2(config-pmap)# class jc4
Switch 2(config-pmap-c)# priority low
Switch 2(config-pmap-c)# exit
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Step 1
through
Step 4
on Switch 1 to address forward path congestion at both switches.
Cisco MDS 9000 Family CLI Configuration Guide
Example Configuration
56-13
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