Chapter 8 Basic Setting
XGS1930 Series User’s Guide
84
8.8 PoE Setup
Note: The following screens are available for the PoE model(s) only. Some features are only
available for the Ethernet ports (1 to 24 for XGS1930-28HP and 1 to 48 for XGS1930-
52HP).
The PoE model(s) supports the IEEE 802.3at High Power over Ethernet (PoE) standard.
A powered device (PD) is a device such as an access point or a switch, that supports PoE (Power over
Ethernet) so that it can receive power from another device through an Ethernet port.
Type
This field displays the capacity that the port can support.
Speed/Duplex
Select the speed and the duplex mode of the Ethernet connection on this port. Choices are
Auto-1000M
,
10M/Half Duplex
,
10M/Full Duplex
,
100M/Half Duplex
,
100M/Full Duplex
and
1000M/
Full Duplex
(Gigabit connections only).
Selecting
Auto-1000M
(auto-negotiation) allows one port to negotiate with a peer port
automatically to obtain the connection speed (of up to 1000M) and duplex mode that both ends
support. When auto-negotiation is turned on, a port on the Switch negotiates with the peer
automatically to determine the connection speed and duplex mode. If the peer port does not
support auto-negotiation or turns off this feature, the Switch determines the connection speed by
detecting the signal on the cable and using half duplex mode. When the Switch’s auto-
negotiation is turned off, a port uses the pre-configured speed and duplex mode when making a
connection, thus requiring you to make sure that the settings of the peer port are the same in
order to connect.
Flow Control
A concentration of traffic on a port decreases port bandwidth and overflows buffer memory
causing packet discards and frame losses.
Flow Control
is used to regulate transmission of signals
to match the bandwidth of the receiving port.
The Switch uses IEEE802.3x flow control in full duplex mode and backpressure flow control in half
duplex mode.
IEEE802.3x flow control is used in full duplex mode to send a pause signal to the sending port,
causing it to temporarily stop sending signals when the receiving port memory buffers fill.
Back Pressure flow control is typically used in half duplex mode to send a "collision" signal to the
sending port (mimicking a state of packet collision) causing the sending port to temporarily stop
sending signals and resend later. Select
Flow Control
to enable it.
802.1p Priority
This priority value is added to incoming frames without a (802.1p) priority queue tag. See
Priority
Queue Assignment
for more information.
Media Type
On the Switch that has a 10 Gigabit interface, such as the SFP+ slot, you can insert either an SFP+
transceiver or an SFP+ Direct Attach Copper (DAC). An SFP+ Direct Attach Copper (DAC) is an
SFP+ housing that has no optical module but uses a fixed-length passive copper cable assembly,
which reduces cost and power significantly.
Select the media type (sfp_plus or dac10g) of the SFP+ module that is attached to the 10 Gigabit
interface.
Apply
Click
Apply
to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the
Save
link on the top navigation panel to save
your changes to the non-volatile memory when you are done configuring.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Table 28 Basic Setting > Port Setup (continued)
LABEL
DESCRIPTION
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Страница 105: ...Chapter 8 Basic Setting XGS1930 Series User s Guide 105 Figure 80 Basic Setting Cloud Management ...
Страница 118: ...Chapter 9 VLAN XGS1930 Series User s Guide 118 Figure 89 Advanced Application VLAN Port Based VLAN Setup All Connected ...
Страница 182: ...Chapter 21 Classifier XGS1930 Series User s Guide 182 Figure 129 Classifier Example ...