Service Policy Enforcement; Dwrr Traffic Scheduler - 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 .
To specify a service policy, follow these steps:
Command
Step 1
switch(config)# qos policy-map MyPolicy
switch(config-pmap)#
switch(config)# no qos policy-map OldPolicy
switch(config)#
Step 2
switch(config-pmap)# class MyClass
switch(config-pmap-c)#
switch(config-pmap)# no class OldClass
Step 3
switch(config-pmap-c)# priority high
switch(config-pmap-c)# no priority high
Step 4
switch(config-pmap-c)# dscp 2
switch(config-pmap-c)# no dscp 60

Service Policy Enforcement

When you have configured a QoS data traffic policy, you must enforce the data traffic configuration by
applying that policy to the required VSAN(s). If you do not apply the policy to a VSAN, the data traffic
configuration is not enforced. You can only apply one policy map to a VSAN.
You can apply the same policy to a range of VSANs.
Note
To apply a service policy, follow these steps:
Command
Step 1
switch(config)# qos service policy MyPolicy
vsan 3
switch(config)# no qos service policy OldPolicy
vsan 7

DWRR Traffic Scheduler

The Cisco SAN-OS software supports four scheduling queues:
•
•
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Strict priority queues are queues that are serviced in preference to other queues—it is always
serviced if there is a frame queued in it regardless of the state of the other queues.
QoS assigns all other traffic to the DWRR scheduling high, medium, and low priority traffic queues.
Purpose
Creates a policy map called MyPolicy and places
you in the policy-map submode.
Deletes the policy map called OldPolicy and places
you in the policy-map submode.
Specifies the name of a predefined class and places
you at the policy-map submode for that class.
Removes the class map called OldClass from the
policy map.
Specifies the priority to be given for each frame
matching this class.
Deletes a previously assigned priority and reverts
to the default value of low.
Specifies the DSCP value to mark each frame
matching this class.
Deletes a previously assigned DSCP value and
reverts to the factory default of 0.
Purpose
Applies a configured policy to VSAN 3.
Deletes a configured policy that was applied
to VSAN 7.
Cisco MDS 9000 Family Configuration Guide
Data Traffic
47-9