Netgear Switch M4100-12G-POE+ User Manual Page 211

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Switching Commands
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
datacenter-bridging
Mode
priority-flow-control mode
Use this command to enable or disable priority-based flow control on an interface.
Format
priority-flow-control mode [on | off]
Mode
Default
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.
Interface Config
Datacenter-Bridging Config
Disabled
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