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ProSafe XSM7224S Managed Stackable Switch CLI Manual, Software Version 9.0
Switching Commands 3-204
v1.0, November 2010
To enable priority-based flow control for a particular CoS value on an interface:
• Ensure that VLAN tagging is enabled on the interface so that the 802.1p priority values are
carried through the network.
• Ensure that 802.1p priority values are mapped to FASTPATH CoS values.
• Use the datacenter-bridging priority-flow-control mode on command to enable priority-based
flow control on the the interface.
• Use the datacenter-bridging priority-flow-control priority command to specify the CoS values
that should be paused ("no-drop") due to greater loss sensitivity. Unless configured as "no-
drop", all CoS priorities are considered nonpausable ("drop") when priority-based flow control
is enabled.
When priority-flow-control is disabled, the interface defaults to the IEEE 802.3x flow control
setting for the interface. When priority-based flow control is enabled, the interface will not pause
any CoS unless there is at least one no-drop priority.
datacenter-bridging priority-flow-control mode on
Use this command to enable priority-based flow control on an interface.
no datacenter-bridging priority-flow-control mode
Use this command to disable priority flow control on an interface.
datacenter-bridging priority-flow-control priority
Use this command to specify the priority group(s) that should be paused when necessary to prevent
dropped frames; i.e., the group to receive priority flow control. This configuration has no effect on
interfaces not enabled for priority flow control.
Format datacenter-bridging priority-flow-control mode on
Mode Interface Config
Default Disabled
Format no datacenter-bridging priority-flow-control
Mode Interface Config