Solving Communication Problems - 3Com SuperStack 3 3870 Getting Started Manual

Solving
Communication
Problems
If yes, check that:
The air vents are not obstructed.
■
The ambient temperatures and environmental conditions meet those
■
specified in Appendix C.
4 Power cycle the unit. If a further thermal shutdown occurs, and all
environmental conditions are satisfactory, return the unit to 3Com. See
"Telephone Technical Support and Repair" on page 78 for information on
returning a unit.
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 re-insert it.
Alternatively, insert another identical SFP. 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.
■
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.

Solving Communication Problems

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