pause no-drop

To enable Class Based Flow Control (CBFC) pause characteristics on a class referenced in a type network-qos policy map, use the pause command. To disable the CBFC pause characteristics on a class, use the no form of this command.

pause no-drop [pfc-cos pfc-cos-list]

no pause no-drop [pfc-cos pfc-cos-list]

Syntax Description


(Optional) Specifies the CoS values to assert priority flow control (PFC) on.


PFC CoS list. The range is from 0 to 7.

Use a comma (,) to separate multiple values, or a hyphen (-) to specify a range of values; for example, 0, 2, 3, or 2-5.

Command Default

By default, pause no-drop is off.

Command Modes

Policy map type network-qos class configuration

Command History



This command was introduced.

Usage Guidelines

Ethernet interfaces use priority flow control (PFC) to provide lossless service to no-drop system classes. PFC implements pause frames on a per-class basis and uses the IEEE 802.1p CoS value to identify the classes that require lossless service.

You can configure PFC CoS only for traffic classes that match a criteria other than the CoS value (match cos).


This example shows how to enable pause no-drop on a class referenced in a type network-qos policy map:

switch(config)# class-map type network-qos my_class1 
switch(config-cmap-nq)# match qos-group 2 
switch(config-cmap-nq)# exit 
switch(config)# policy-map type network-qos my_policy1 
switch(config-pmap-nq)# class type network-qos my_class1 
switch(config-pmap-nq-c)# pause no-drop 

Related Commands


show class-map type network-qos

Displays type network-qos class maps.

show policy-map

Displays policy maps.