Solving Communication Problems - 3Com SuperStack 3 4950 Getting Started Manual

42 C 4: P
HAPTER ROBLEM
Solving
Communication
Problems
S
OLVING
Error message indicating that the GBIC transceiver is faulty
To correct this problem, completely remove the GBIC and then reinsert it.
If the problem persists, contact 3Com Technical Support.
If you experience communication problems with the Switch, ensure that:
The Switch IP address has been configured.
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If the Switch is separated from your management application by a
■
router, ensure that the default gateway IP address within the Switch is
the same as the IP address of the router.
The Switch's IP address has been entered correctly in your network
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management application (for example 3Com Network Supervisor).
The following is an brief overview of IP addressing, and how to obtain a
registered IP address.
IP Addressing
To be managed correctly, each device on your network (for example a
Switch or Hub) must have a unique IP address. IP addresses have the
format n.n.n.n where n is a decimal number between 0 and 255. An
example IP address is 192.168.100.8.
The IP address is split into two parts:
The first part ('192.168.100' in the example) identifies the network on
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which the device resides
The second part ('.8' in the example) identifies the device within the
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network
The natural subnet mask for this example is 255.255.255.0.
If your network has a connection to the external IP network, that is, you
access the Internet, you must apply for a registered IP address.