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
31-10
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 31 Configuring QoS
Configuring System Classes
To configure a policy map, perform this task:
Note The switch distributes all the policy map configuration values to the attached network adapters.
Note
Policy maps can also be configured for interface service policies. However, different parameters are
supported in these policy maps. See the
“Configuring QoS on Interfaces” section on page 31-13 .
The following example shows how to enable optimized multicast for the default Ethernet class:
switch(config)# policy-map s1
switch(config-pmap)# class class-default
switch(config-pmap-c)# multicast-optimize
The following example shows how to create a policy map with a no-drop Ethernet 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
Command Purpose
Step 1
switch# configure terminal
Enters configuration mode.
Step 2
switch(config)# policy-map name
Creates a named object representing a set of policies
that are to be applied to a set of traffic classes.
Policy-map names can contain alphabetic, hyphen, or
underscore characters, are case sensitive, and can be up
to 40 characters.
Step 3
switch(config-pmap)# class class-name
Associates a class map with the policy map, and enters
configuration mode for the specified system class.
Step 4
switch(config-pmap-c)#
pause no-drop
(Optional) Configures a no-drop class. If you do not
specify this subcommand, the default policy is drop.
Note
The operation for drop policy is simple tail
drop, where arriving packets will be dropped if
the queue increases to its allocated size
Step 5
switch(config-pmap-c)# mtu value
(Optional) Specifies the MTU value in bytes.
Step 6
switch(config-pmap-c) bandwidth percent
percentage
(Optional) Specifies the guaranteed percentage of
interface bandwidth allocated to this class.
Step 7
switch(config-pmap-c) priority
(Optional) Specifies that traffic in this class is mapped
to a strict priority queue.
Step 8
switch(config-pmap-c) multicast-optimize
(Optional) Enables multicast optimization. Multicast
traffic in this class will be served by all available
multicast queues.
Note Only one class in a policy map can be
configured for multicast optimization.