Purpose
Command or Action
Configures the traffic class by matching packets based on a list
of QoS group values. Values can range from 0 to 5. QoS group
switch(config-cmap-nq)#
match qos-group
qos-group-value
Step 3
0 is equivalent to class-default and QoS group 1 is equivalent to
class-fcoe.
qos-groups 0 and 1 are reserved for default classes and
cannot be configured.
Note
Exits class-map mode and enters global configuration mode.
switch(config-cmap-nq)#
exit
Step 4
Creates a named object that represents a class of traffic. Class-map
names can contain alphabetic, hyphen, or underscore characters,
are case sensitive, and can be up to 40 characters.
switch(config)#
class-map type
{
network-qos
}
class-name
Step 5
Configures the traffic class by matching packets based on a list
of QoS group values. Values can range from 0 to 5. QoS group
switch(config-cmap-nq)#
match qos-group
qos-group-value
Step 6
0 is equivalent to class-default and QoS group 1 is equivalent to
class-fcoe.
qos-groups 0 and 1 are reserved for default classes and
cannot be configured.
Note
Exits class-map mode and enters global configuration mode.
switch(config-cmap-nq)#
exit
Step 7
Creates a named object that represents a set of policies that are
to be applied to a set of traffic classes. Policy-map names can
switch(config)#
policy-map
type network-qos policy-name
Step 8
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.
The associated class map must be the same type as the
policy map type.
Note
switch(config-pmap-nq)#
class
type network-qos class-name
Step 9
Configures a no-drop class. If you do not specify this command,
the default policy is drop.
The operation for the drop policy is a simple tail drop,
where arriving packets will be dropped if the queue
increases to its allocated size.
The pfc-cos-value range is from 0 to 7. This option is
supported only for a ACL-based system class (which
filters traffic using criteria other than cos-based
matches).
Note
The list of CoS values can potentially include
the CoS value that is used for FCoE traffic
in class-fcoe. You must determine if this is
desired behavior for your topology.
Caution
switch(config-pmap-c-nq)#
pause no-drop
[
pfc-cos
pfc-cos-value
]
Step 10
Cisco Nexus 5500 Series NX-OS SAN Switching Configuration Guide, Release 7.x
210
OL-30895-01
Configuring iSCSI TLV
Configuring No-Drop Policy Maps
