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
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Cisco MDS 9000 Family CLI Configuration Guide
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Chapter 56 Configuring Fabric Congestion Control and QoS
QoS
QoS Initiation for Data Traffic
By default, the QoS data traffic feature is disabled for data traffic. To configure QoS for data traffic, you
must first enable the data traffic feature in the switch.
Tip
QoS is supported in interoperability mode—its effectiveness depends on the location of Cisco MDS
9000 Family switches in the fabric relative to the location of the source or destination of the prioritized
devices.
To enable the QoS data traffic feature, follow these steps:
About Class Map Creation
Use the class map feature to create and define a traffic class with match criteria to identify traffic
belonging to that class. The class map name is restricted to 63 alphanumeric characters and defaults to
the match-all option. Flow-based traffic uses one of the following values:
•
WWN—The source WWN or the destination WWN.
•
Fibre Channel ID (FC ID) —The source ID (SID) or the destination ID (DID). The possible values
for mask are FFFFFF (the entire FC ID is used—this is the default), FFFF00 (only domain and area
FC ID is used), or FF0000 (only domain FC ID is used).
Note
An SID or DID of 0x000000 is not allowed.
•
Source interface—The ingress interface.
Tip
The order of entries to be matched within a class map is not significant.
Creating a Class Map
Use the
class-map
command to create and define a traffic class with match criteria to identify traffic
belonging to that class. Define each match criterion with one match statement from the class map
configuration (
switch(config-cmap))
mode.
•
Use the
source-wwn
option to specify the source WWN or the
destination-wwn
option to specify
the destination WWN.
•
Use the
source-address
option to specify the source ID (SID) or the
destination-address
option to
specify the destination ID (DID).
•
Use the
input-interface
option to specify the ingress interface.
Command
Purpose
Step 1
switch#
config t
Enters configuration mode.
Step 2
switch(config)#
qos enable
Enables QoS. You can now configure data traffic parameters.
switch(config)#
no qos enable
Removes the currently applied QoS configuration and disables
QoS. You can no longer configure data traffic parameters.