D-Link DXS-3600 Series Reference Manual page 967

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
transmit characteristics. When the offered load in the traffic class doesn't use its allocated bandwidth,
ETS will allow other traffic classes to use the available bandwidth. The bandwidth assigned to each traffic
class is configured in unit of percentage by the ets-queue bandwidth command.
Example
This example shows how to configure the queue scheduling algorithm mode to ETS mode on interface
eth3/0/1.
Switch# configure terminal
Switch(config)# interface eth3/0/1
Switch(config-if)# mls qos scheduler ets
Switch(config-if)#
81-5 pause
This command is used to enable Priority-based Flow Control (PFC) on a class referenced in a type
network QoS policy map. Use the no form of the command to disable Priority-based Flow Control (PFC)
on a class.
pause
no pause
Parameters
None.
Default
By default, this option is disabled.
Command Mode
Policy Map Type Network-QoS Class Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
Ethernet interfaces use Priority-based Flow Control (PFC) to provide lossless service.
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.
If PFC of all priorities is disabled, the interface defaults to the IEEE 802.3x flow control setting. When PFC
of any priority is enabled, the interface will recognize PFC PAUSE frames. In other words, the switch will
pause a CoS on which PFC is enabled and the received PFC PAUSE indicates the CoS should be
paused. A PFC PAUSE frame will be transmitted if the congestion is detected on the PFC enabled CoS.
To enable PFC on a per-CoS basis, do the following:
•
Use the class-map type network-qos match-any global configuration command to create a
type network QoS class map.
•
Use the policy-map type network-qos command to create a type network QoS policy map.
Use the match cos class-map configuration command to specify which CoS to
o
configure.
Use the class type network-qos policy-map configuration command to specify a type
o
network QoS class map to be associated with a traffic policy and then enter into the
policy-map type network-QoS class configuration mode.
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