Cisco N5010P-N2K-BE, Software Configuration Manual

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S e n d f e e d b a c k t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m
31-11
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 31 Configuring QoS
Configuring System Classes
Creating the System Service Policy
The service-policy command is used to associate the system class policy-map as the service policy for
the system.
The following example sets a no-drop Ethernet policy map as the system class:
switch(config)# class-map ethCoS4
switch(config-cmap)# match cos 4
switch(config-cmap)#
exit
switch(config)# policy-map ethNoDrop
switch(config-pmap)# class ethCoS4
switch(config-pmap-c)#
pause no-drop
switch(config)# system qos
switch(config-system)#
service-policy ethNoDrop
System Class Example
In the following example, a new Ethernet no-drop system class is created, and the CoS values of the
default system classes are changed from their default values:
switch(config)#
class-map trading-data-no-drop
switch(config-cmap)# match cos 5
switch(config)# class-map class-fcoe
switch(config-cmap)#
match cos 2
switch(config)# policy-map system-policy
switch(config-pmap)# class trading-data-no-drop
switch(config-pmap-c)#
pause no-drop
switch(config-pmap-c)# mtu 2000
switch(config)#
system qos
switch(config-system)# service-policy system-policy
In this example, the first class-map command defines a new Ethernet system class. Packets from all over
the system with 802.1p CoS value of 5 will be classified into this new system class.
The second class-map command changes the match value of the default no-drop system class.
The policy-map command defines a QoS policy for each traffic class. The new Ethernet class is
configured as a no-drop class, with an MTU of 2000 bytes. The pause no-drop command causes PFC
to apply pause functionality for packets with IEEE 802.1p priority value 5.
The service-policy command sets the specified policy as the system class.
Enabling Jumbo MTU
To enable jumbo MTU for the whole switch, set the MTU to its maximum size (9216 bytes) in the policy
map for the default Ethernet system class (class-default).
Command Purpose
Step 1
switch# configure terminal
Enters configuration mode.
Step 2
switch(config)# system qos Enters system class configuration mode.
Step 3
switch(config-sys-qos)# service-policy
name
Specifies the policy-map to use as the service policy
for the system.