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Troubleshooting 4 - 5
RFS Troubleshooting
When you enable redundancy for a port on one 10BASE-FL Module
(splices), you must enable Remote Failure Signaling (RFS) on the
corresponding port of the remote 10BASE-FL Module to which it is
connected. If you accidentally enable RFS on both sides of a 10BASE-FL link,
the link may fail because each side “thinks” it is the remote end of the link.
In addition, when you enable redundancy on both sides of a 10BASE-FL link
and the primary port fails, the backup port on the remote end of the link
does not take over because the port “thinks” it is the primary port.
Technical Assistance
You can receive assistance for installing and troubleshooting the 10BASE-FL
Module by calling either your 3Com reseller or 3Com Technical Support. Be
prepared to supply a representative with the following information:
❑ Description of the problem
❑ Steps you have taken to try and correct the problem
❑ Type and software version of the ONline management module being
used
3 Blinks
(continued)
FIFO error or
MAU
jabber
lockup
protection
Bad unit or
non-10BASE-FL
equipment at
other end.
Try another port or
replace other unit.
Bad 10BASE-FL
Module.
Replace module.
Table 4-2. Troubleshooting Using the Port Status LEDs
LED State Indication Possible Cause Corrective Action