Poe Status - ZyXEL Communications XGS2210-28 User Manual

Table 19 Basic Setting > Port Setup (continued)
LABEL
Speed/Duplex
Flow Control
802.1p Priority
BPDU Control
Media Type
Apply
Cancel

8.8 PoE Status

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 XGS2210-28HP and 1 to 48 for XGS2210-
52HP).
The PoE model(s) supports the IEEE 802.3at High Power over Ethernet (PoE) standard.
Chapter 8 Basic Setting
DESCRIPTION
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.
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.
This priority value is added to incoming frames without a (802.1p) priority queue tag. See Priority
Queue Assignment in Table 14 on page 70
Configure the way to treat BPDUs received on this port. You must activate bridging control
protocol transparency in the Switch Setup screen first.
Select Peer to process any BPDU (Bridge Protocol Data Units) received on this port.
Select Tunnel to forward BPDUs received on this port.
Select Discard to drop any BPDU received on this port.
Select Network to process a BPDU with no VLAN tag and forward a tagged BPDU.
You can insert either an SFP+ transceiver or an SFP+ Direct Attach Copper (DAC) cable into the
10 Gigabit interface of the Switch.
Select the media type (sfp_plus or dac10g) of the SFP+ module that is attached to the 10 Gigabit
interface.
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.
Click Cancel to begin configuring this screen afresh.
XGS2210 Series User's Guide
for more information.
77