IBM 315, Дополнение к руководству по техническому обслуживанию оборудования

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Switched Hubs:
In a switched network environment,
each port uses a fixed, dedicated amount of bandwidth.
Network bandwidth is not shared among all stations. Each
new station added to the hub receives access to the full
bandwidth of the network. Data is sent only to the port
that leads to the correct workstation.
If a new workstation is added to a 100 Mbps switching
hub, the new workstation receives its own dedicated, 100
Mbps link that does not affect the 100 Mbps bandwidth of
other workstations. Switching hubs can effectively
increase the overall bandwidth available on the network,
significantly improving performance.
100/10 Ethernet Adapter
Troubleshooting
The following information is for troubleshooting problems
that might occur when the 100/10 PCI Ethernet Adapter is
installed in the server.
Network Connection Problems:
If the adapter
cannot connect to the network, check the following:
Ÿ
Make sure the cable is installed correctly.
The network cable must be securely attached at all
connections. If the cable is attached but the problem
persists, try a different cable.
If you set the Ethernet adapter to operate at 100
Mbps you must use Category 5 cabling. Refer to the
Hardware Specifications and Cabling Information
section in the help file for a list of recommended
cables and information on how to install cabling.
If you directly connect two workstations (no hub), use
a crossover cable. Refer to the Hardware
Specifications and Cabling Information section in
the help file.
Ÿ
Check the LEDs on the rear of the Ethernet adapter.
The Ethernet adapter has three diagnostic LEDs
beside the cable connector. These lights help
indicate whether a problem exists with the connector,
cable, or hub.
– The LNK LED illuminates when the adapter
receives a LNK pulse from the hub. If the LED
is OFF, there might be a bad connector or cable,
or a problem with the hub. The LNK LED is also
OFF when you run the diagnostic tests in the
Setup program.
– The ACT LED illuminates when the adapter
detects read or write activity on the network,
even when there is no activity on the adapter. If
the ACT LED is not on, make sure that the hub
and network are operating and that the correct
drivers are loaded.
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PC Server HMM