Repotec RP-1708K, Руководство пользователя

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Notice:
Cable distance for 5/8-port Ethernet Switch
The cable distance between 5/8-port Ethernet Switch and hub/ PC should not
exceed 100 meter.
Make sure the wiring is correct
It can be used Category 3/4/5 cable in 10Mbps operation. To reliably operate
your network at 100Mbps, you must use an Unshielded Twisted-Pair (UTP)
Category 5 cable, or better Data Grade cabling. While a Category 3 or 4 able
may initially seem to work, it will soon cause data loss.
Switch Operation
Address Table
The 5/8-port Ethernet Switch is implemented with an address table. This
address table composed of many entries. Each entry is used to store the
address information of some node in network, including MAC address, port
no. etc. This information comes from the learning process of Ethernet
Switch.
Learning
When one packet comes from some port of the Ethernet Switch, it will also
check the destination address besides the source address learning. The
Ethernet Switch will lookup the address-table for the destination address. If
not found, this packet will be forwarded to all the other ports except the port,
which this packet comes in. And these ports will transmit this packet to the
network it connected. If found, and the destination address is located at
different port form this packet comes in, the Ethernet Switch will forward
this packet to the port where this destination address is located according to
the information from address table. But, if the destination address is located
at the same port with this packet comes in, when this packet will be filtered.
Thereby increasing the network throughput and availability.
Store-and-Forward
Store-and-forward is one type of packet-forwarding techniques. A
Store-and-forward Ethernet Switch stores the incoming frame in an internal
buffer, do the complete error checking before transmission. Therefore, no
error packets occurrence, it is the best choice when a network needs
efficiency and stability.
The 5/8-port Ethernet Switch scans the destination address from the
packet-header, searches the routing table provided for the incoming port and
forwards the packet, only if required. The fast forwarding makes the switch
attractive for connecting servers directly to the network, thereby increasing
throughput and availability. However, the switch is most commonly used to
segment existing hubs, which nearly always improves overall performance.
An Ethernet Switch can be easily configured in any Ethernet network
environment to significantly boost bandwidth using conventional cabling
and adapters.
Due to the learning function of the Ethernet switch, the source address and
corresponding port number of each incoming and outgoing packet are stored
in a routing table. This information is subsequently used to filter packets
whose destination address is on the same segment as the source address.
This confines network traffic to its respective domain, reducing the overall
load on the network.
The 5/8-port Ethernet Switch performs “Store-and-forward” therefore, no
error packet occurred. More reliably, it reduces the re-transmission rate. No
packet loss will occur.
Auto-Negotiation
The STP ports on the 5/8-port switch have built-in “Auto-negotiation”. This
technology automatically sets the best possible bandwidth when a
connection is established with another network device (usually at Power On
or Reset). This is done by detect the modes and speeds at the second of both
device is connected and capable. Both 10Base-T and 100Base-TX devices
can connect with the port in either Half or Full-duplex mode.
If attached device is: The port will set to:
10Mbps, no auto-negotiation 10Mbps
10Mbps, auto-negotiation 20Mbps (10Base, Full-duplex)
100Mbps, no auto-negotiation 100Mbps
100Mbps, auto-negotiation 200Mbps (100Base, Full-duplex)
Troubleshooting
This Chapter contains information to help you solve problems. If the
5/8-port Ethernet Switch is not functioning properly, make sure the 5/8-port
Ethernet Switch was set up according to instructions in this manual.
The Link LED is not lit
Solution:
a. Make sure the switch configuration is consistent with the connecting
device.
b. Check the cable connections.
Performance is bad
Check the full-duplex status of the Ethernet Switch. If the Ethernet Switch is
set to full duplex and the partner is set to half-duplex, then the performance
will be poor.
Some station cannot talk to other station located on the other port
Solution:
The address table may contain older information than of the address table of
the node. Please power down to refresh the address information.
Hub’s RJ-45 Pin Assignment
Pin Station Ports 1-8 Uplink Port
1 Input Receive Data+ Output Transmit Data+
2 Input Receive Data- Output Transmit Data-
3 Output Transmit Data+ Input Receive Data+
6 Output Transmit Data- Input Receive Data-
4,5,7,8 Not used Not used
The information in this Quick Start Guide is subject to change without notice. All
the brand names are registered trademarks of their respective companies.