Chapter 6 Basic Setting
Table 13 Port Setup (continued)
LABEL | DESCRIPTION |
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 IEEE 802.3x flow control in full duplex mode and back pressure flow |
| control in half duplex mode. |
| IEEE 802.3x 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. |
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802.1P Priority | This priority value is added to incoming frames without a (802.1p) priority queue tag. |
| See Priority Queue Assignment in Table 11 on page 68 for more information. |
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BPDU Control | 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. |
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Ports 17, 18 |
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Port | This is the port index number. |
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Active | Select this check box to enable a port. The factory default for all ports is enabled. A |
| port must be enabled for data transmission to occur. |
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Name | Enter a descriptive name that identifies this port. You can enter up to 64 alpha- |
| numerical characters. |
| Note: Due to space limitation, the port name may be truncated in |
| some web configurator screens. |
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Type | This field displays 10/100/1000M for the Gigabit/ mini GBIC combo ports or 1000M for |
| the mini GBIC ports. |
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Speed/Duplex | Select the speed and the duplex mode of the connection on this port. Choices are |
| Auto, 10M/Half Duplex, 10M/Full Duplex, 100M/Half Duplex, 100M/Full Duplex |
| and 1000M/Full Duplex. |
| Selecting Auto |
| automatically to obtain the connection speed and duplex mode that both ends |
| support. When |
| peer automatically to determine the connection speed and duplex mode. If the peer |
| port does not support |
| the connection speed by detecting the signal on the cable and using half duplex |
| mode. When the switch’s |
| 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. |
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