Configuring Hardware Buffer for Lossless Traffic

About this task

Two QoS hardware profiles are provided to enable/disable support for buffer allocation. Select the lossy hardware profile to disable this feature. If you execute any PFC/Pause related commands, they will throw error messages. Select the lossless profile to enable this feature. PFC/Pause configurations can now be applied to the selected interface.

Procedure

Enter configuration mode.

device# configure terminal

Enter the hardware context.
```
device# hardware
                    
```

Use the following command to use the lossless profile.

device(hardware)# profile qos ? 

Possible completions:
  lossless   set qos hardware lossless profile
  lossy      set qos hardware lossy profile

device(hardware)# profile qos lossless
device(hardware)#

Return to privileged exec mode.

device(hardware)# exit

Save the configuration.

device# copy running-config startup-config

To view the PFC/Pause statistics, use the show qos flowcontrol stats command.

device# show qos flowcontrol stats interface eth 0/1

Interface Ethernet 0/1
                                TX              RX
    ----------------------------------------------
    PAUSE Frames:           565856          441122
    PFC Pri0   Frames:      565856          441122
    PFC Pri1   Frames:      565856          441122
    PFC Pri2   Frames:      565856          441122
    PFC Pri3   Frames:      565856          441122
    PFC Pri4   Frames:      565856          441122
    PFC Pri5   Frames:      565856          441122
    PFC Pri6   Frames:      565856          441122
    PFC Pri7   Frames:      565856          441122