Solving Communication Problems 55
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 as described in Chapter 3
■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 (such as 3Com Network Supervisor).
The following is a 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.
DUA1730-0AAA03.book Page 55 Thursday, November 17, 2005 12:17 PM