Ingress Port Rate Limiting - Cisco DS-X9530-SF1-K9 - Supervisor-1 Module - Control Processor Configuration Manual

Chapter 47 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 .
Switch 2(config-pmap-c)# priority low
Switch 2(config-pmap-c)# exit
Switch 2(config-pmap)# exit
Switch 2(config)#
Step 3 Assign the service policy.
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)#
Step 2 Assign the class maps to the policy map.
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
Switch 2(config-pmap)# exit
Switch 2(config)#
Repeat
Step 3

Ingress Port Rate Limiting

A port rate limiting feature helps control the bandwidth for individual FC ports. Port rate limiting is also
referred to as ingress rate limiting because it controls ingress traffic into a FC port. The feature controls
traffic flow by limiting the number of frames that are transmitted out of the exit point on the MAC. Port
rate limiting works on all Fibre Channel ports. The rate limit ranges form 1 to 100% and the default is
100%.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Step 1 through Step 4 on Switch 1 to address forward path congestion at both switches.
Step 1 through Step 2 on Switch 1 to address return path congestion at both switches.
Ingress Port Rate Limiting
Cisco MDS 9000 Family Configuration Guide
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