HP 1920 Gigabit Ethernet Switch Series User Manual page 85

Item Description
Enable or disable flow control on the port.
With flow control enabled at both sides, when traffic congestion occurs on the ingress
port, the ingress port sends a Pause frame notifying the egress port to temporarily suspend
Flow Control
the sending of packets. The egress port is expected to stop sending any new packet when
it receives the Pause frame. In this way, flow control helps to avoid dropping of packets.
Flow control works only after it is enabled on both the ingress and egress ports.
Enable or disable auto power-down on a port that is down.
By default, auto power-down is disabled on an Ethernet port that is down.
With auto power-down enabled on an Ethernet port that stays in the down state for a
certain period, the following events occur:
•
Power Save
•
When the Ethernet port comes up, the following events occur:
•
•
Set the MAC learning limit on the port:
•
Max MAC Count
•
Enable or disable Energy Efficient Ethernet (EEE) on a link-up port.
With EEE enabled, when a link-up Ethernet port does not receive any packet for a certain
EEE
period, it automatically enters low power mode. When a packet arrives later, the device
restores power supply to the port and the port resumes its normal state.
Set broadcast suppression on the port:
•
Broadcast
•
Suppression
•
Set multicast suppression on the port:
•
Multicast
•
Suppression
•
The device automatically stops supplying power to the port.
The port enters the power save mode.
The device automatically restores power supply to the port.
The port resumes its normal state.
User Defined—Select this option to set the limit manually.
No Limited—Select this option to set no limit.
ratio—Sets the maximum percentage of broadcast traffic to the total bandwidth of an
Ethernet port. When you select this option, you must enter a percentage in the box
below.
pps—Sets the maximum number of broadcast packets that can be forwarded on an
Ethernet port per second. When you select this option, you must enter a number in the
box below.
kbps—Sets the maximum number of kilobits of broadcast traffic that can be forwarded
on an Ethernet port per second. When you select this option, you must enter a number
in the box below.
ratio—Sets the maximum percentage of multicast traffic to the total bandwidth of an
Ethernet port. When you select this option, you must enter a percentage in the box
below.
pps—Sets the maximum number of multicast packets that can be forwarded on an
Ethernet port per second. When you select this option, you must enter a number in the
box below.
kbps—Sets the maximum number of kilobits of multicast traffic that can be forwarded
on an Ethernet port per second. When you select this option, you must enter a number
in the box below.
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