D-Link DXS-3600 Series Reference Manual page 900

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
Parameters
None.
Default
By default, this option is disabled.
Command Mode
Interface Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
Priority-based Flow Control (PFC), which is defined in IEEE 802.1Qbb, extends the basic IEEE 802.3x
pause semantics and uses the IEEE 802.1p CoS values in the IEEE 802.1Q VLAN tag to differentiate up
to eight CoSs that can be subject to flow control independently.
The following is a procedure to enable PFC on a priority basis.
•
Use the class-map type network-qos global configuration command to create a type network-
QoS class map.
•
Use the match cos class-map configuration command to specify which priorities to configure.
•
Use the policy map type network-qos command to create a type network QoS policy map.
•
Use the class type network-qos policy-map configuration command to specify a type network
QoS class map to be associated with a traffic policy.
•
Use the pause policy map type network-qos class configuration command to enable the PFC
pause characteristics on a class referenced in a type network QoS policy map.
•
Use the service-policy interface configuration command to apply a type network QoS policy
map.
If the PFC of all priorities is disabled on an interface, the interface defaults to the IEEE 802.3x flow control
setting. When the PFC of any priority is enabled, the interface will pause a CoS on which the PFC is
enabled and a pause frame for that CoS is received. Meanwhile, a pause frame will be transmitted if
congestion is detected on the PFC enabled CoS.
This command is used to turn on the DCBX PFC willing feature that indicates that the local port is willing
to accept PFC configurations from a remote system.
Enable the Switch to transmit LLDP DCBX PFC TLVs to advertise the PFC setting per-CoS and negotiate
with the peer to take the PFC willing feature into effect.
Example
This example shows how to turn on the DCBX PFC willing bit on the interface eth1/0/3.
Switch# configure terminal
Switch(config)# interface eth1/0/3
Switch(config-if)# priority-flow-control willing
Switch(config-if)#
76-3 show interfaces priority-flow-control
This command is used to display PFC information of an interface.
show interfaces [INTERFACE-ID [, | -]] priority-flow-control
Parameters
900