HP ProCurve Series 6120 Blade Switches Advanced Traffic Management Guide

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Converged Enhanced Ethernet on the HP ProCurve 6120XG Switch
Configuring Priority Flow Control (PFC)
Figure 6-9. Example of Enabling PFC on Port 5
To disable PFC, you can enter no flow-control in the interface context.
Figure 6-10. Example of Disabling PFC on a Port
Notes on the Behavior of Priority Flow Control
■ There must be a lossless queue configured for PFC to take effect (See
“Configuring Traffic Templates” on page 6-8 for more information). If
there is no lossless queue configured, the flow control configuration does
not change and an error message is displayed.
■ In order for exchange of PFC control packets to function correctly, the
ingress port and egress port must be in the same tagged VLAN.
■ The port specified in the command must be a 10G port in 10G mode; if it
is not, an error message is displayed.
■ For proper function, ensure that PFC is enabled on the same 802.1p
priorities on the neighboring device's connected port (enter the command
show qos queue-config to view lossless priorities in effect on your switch).
Displaying the Status of Flow Control
To display the flow control status of the ports, enter the show interface brief
or show interface config commands.
ProCurve(config)# int 5 flow-control priority
ProCurve(config-eth-5)# no flow-control