Netgear M4100-D12G CLI Manual - Page 211

ProSafe M4100 and M7100 Managed Switches dropped frames, while allowing traffic that has greater loss tolerance to continue to flow on the interface. 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. Switching Commands 211