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Solving Communication Problems 49
Error message indicating that the SFP transceiver is invalid
The Switch has identified that the SFP does not meet the minimum
requirements for the Switch and has disabled the port. To correct this
problem, completely remove the SFP and replace it with a 3Com
approved SFP. See ““Approved SFP Transceivers”
on page 26.
Error message indicating that the SFP transceiver is faulty
To correct this problem, completely remove the SFP and then reinsert it.
Alternatively, insert another identical SFP. If the problem persists, contact
3Com Technical Support.
Solving
Communication
Problems
If you experience communication problems with the Switch, ensure that:
■ The Switch IP address has been configured.
■ 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
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
which the device resides
■ The second part (‘.8’ in the example) identifies the device within the
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.
dua1740-0aaa03.book Page 49 Thursday, December 23, 2004 9:23 PM