Netgear GSM7328SO Command Line Interface (CLI) User Manual - Page 230
datacenter-bridging, priority-flow-control mode
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ProSafe Managed Switch Priorities are differentiated by the priority field of the IEEE 802.1Q VLAN header, which identifies an IEEE 802.1p priority value. In NETGEAR Managed Switch, these priority values must be mapped to internal class-of-service (CoS) values. 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 IEEE 802.1Q CoS values. • Use the datacenter-bridging priority-flow-control mode on command to enable priority-based flow control on 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 Use this command to go into datacenter-bridging mode. Format Mode datacenter-bridging Interface Config priority-flow-control mode Use this command to enable or disable priority-based flow control on an interface. Format Mode Default priority-flow-control mode [on | off] Datacenter-Bridging Config Disabled 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. VLAN tagging must be enabled to carry the 802.1p value through the network. The number of lossless priorities supported is 2. Additionally, the mapping of class-of-service levels to 802.1p priority values to must be set to one-to-one. Format priority-flow-control priority priority-list {drop | no-drop} Switching Commands 230