Solving A Communication Problem With The Ethernet Adapter - IBM 5500 Operational, Installation, And Maintenance Manual

Solving a Communication Problem with the Ethernet Adapter

Occasionally, the 5500 Control Unit fails to communicate with workstations
on the Ethernet LAN (even though the workstations operate correctly). Figure
31 lists some common problems and suggested actions. See Figure 32 on page
78 to help you locate components on the Ethernet Adapter.
Figure 31: Ethernet Adapter Errors and Actions
Errors
The diagnostics complete
successfully, but the connection
fails.
LNK LED does not light
ACT LED does not light
Data is corrupted or sporadic
Actions
• Ensure that the network cable is
securely attached.
• Ensure that you are using
category 5 cabling when
operating at 100 Mbps.
• Check all connections at the
adapter and the hub.
• Try another port on the hub.
• Ensure that the hub port is
configured for the correct
speed, 10 or 100 Mbps.
• If you suspect that the network
might be idle, try sending data
from a workstation.
• Ensure that you are using
category 5 cabling when
operating at 100 Mbps
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