Configuring Policy Maps - Cisco AJ732A - MDS 9134 Fabric Switch Configuration Manual

Configuring System Classes
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

Configuring Policy Maps

The policy-map command is used to create a named object representing a set of policies that are to be
applied to a set of traffic classes.
The switch provides two default system classes: a no-drop class for lossless service and a drop class for
best-effort service. You can define up to four additional system classes for Ethernet traffic.
You need to create a policy map to specify the policies for any user-defined class. In the policy-map, you
can configure the QoS parameters for each class. You can use the same policy map to modify the
configuration of the default classes.
Before creating the policy map, define a class map for each new system class.
Note
To configure a policy map, perform this task:
Command
Step 1
switch# configure terminal
Step 2
switch(config)# policy-map name
Step 3
switch(config-pmap)# class class-name
Step 4
switch(config-pmap-c)# pause no-drop
Step 5
switch(config-pmap-c)# mtu value
Step 6
switch(config-pmap-c) bandwidth percent
percentage
Step 7
switch(config-pmap-c) priority
Step 8
switch(config-pmap-c) multicast-optimize
The switch distributes all the policy map configuration values to the attached network adapters.
Note
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
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Purpose
Enters configuration mode.
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.
Associates a class map with the policy map, and enters
configuration mode for the specified system class.
(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
(Optional) Specifies the MTU value in bytes.
(Optional) Specifies the guaranteed percentage of
interface bandwidth allocated to this class. This
parameter applies to all Ethernet interfaces that do not
have ingress or egress policies configured.
(Optional) Specifies that traffic in this class is mapped
to a strict priority queue. This parameter applies to all
Ethernet interfaces that do not have ingress or egress
policies configured.
(Optional) Enables multicast optimization. Multicast
traffic in this class will be served by all available
multicast queues.
Only one class in a policy map can be
Note
configured for multicast optimization.
Chapter 31 Configuring QoS
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