D-Link DES-6000 User Manual page 52

Modular Ethernet Switch User's Guide
Items in the above window are defined as follows:
♦ Module Specify the module containing the port you wish to configure.
♦ Port Specify the port you wish to configure.
♦ Port Type Specifies the speed and cable type of the selected port.
♦ State Enables or disables the port. This amounts to turning the port on or off.
♦ Speed/Duplex Selects the desired Speed and Duplex settings for the port. Possibilities include: Auto,
100M/Full, 100M/Half, 10M/Full, or 10M/Half. Choosing Auto enables NWay auto-configuration on
the port. If the port is a Gigabit Ethernet port, 1000M/Full will be displayed in this field.
♦ Flow Ctrl Toggles flow control On or Off. Flow control is useful during periods of heavy network
activity when the Switch's buffers can receive too much traffic and fill up faster than the Switch can
forward the information. In such cases, the Switch will intervene and tell the transmitting device to
pause to allow the information in the port buffer to be sent.
♦ Priority Selects Normal, High or Low. The Switch has two packet queues where incoming packets
wait to be processed for forwarding; a high priority and low priority queue. The high priority queue
should only be used for data in which latency can have adverse affects on the function of an application,
such as video or audio data, where latency can produce distorted sounds and images. Packets in the low
priority queue will not be processed unless the High priority queue is empty. Setting the port priority to
High will deliver all packets arriving at the port to the high priority queue, a Low setting will send
them all to the low priority queue. The Normal setting causes the port to examine the packet for an
IEEE 802.1p/Q priority tag. If no tag exists, the packet will be sent to the low priority queue. If the
priority tag field in the packet header contains a value of 0-3, the packet will be placed in the low
priority queue; a value of 4-7 causes the packet to be placed in the high priority queue.
♦ Port Lock When Enabled, automatic learning for all stations connected to this port will stop and
entries in the Forwarding Table for all devices residing on this port will age out. The only traffic this
port will allow is traffic from machines whose MAC address is manually entered in the Static
Forwarding Table.
♦ Broadcast Storm Rising Action This setting will be activated when a Broadcast Storm Rising
Threshold is met. When triggered, the port can be configured to Do Nothing, Blocking or Block & Trap.
The Do Nothing setting causes the switch to operate normally, in other words, ignore the broadcast
storm condition. The Blocking setting causes the port to drop all broadcast frames, thus isolating the
broadcast storm. Block & Trap performs the same action as Blocking, except it also sends a trap to the
designated Trap Recipient informing them of the situation. For more information on broadcast storms,
please refer to the previous chapter.
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Figure 6-14. Port Configuration screen
Using the Console Interface