3-77
Catalyst 3750, 3560, 3550, 2975, 2970, and 2960 Switch System Message Guide
OL-8551-04
Chapter 3 Message and Recovery Procedures
PHY Messages
PHY Messages
This section contains the PHY messages.
Error Message PHY-4-BADTRANSCEIVER: An inappropriate transceiver has been inserted
in interface [chars].
Note This message applies only to Catalyst 3750, 3560, 2975, 2970, and 296 0 switches.
Explanation A transceiver that should not be used is in the specified interface.
Recommended Action Remove the transceiver. If the transceiver is a Cisco device, contact your Cisco
technical support representative.
Error Message PHY-4-CHECK_SUM_FAILED: SFP EEPROM data check sum failed for SFP
interface [chars].
Note This message applies only to Catalyst 3750, 3560, 2975, 2970, and 296 0 switches.
Explanation The SFP module was identified as a Cisco SFP module, but the system cannot read the
vendor data information to verify whether it is correct. [chars] is the interface in which the SFP
module is installed.
Recommended Action Remove and then reinsert the SFP module. If it fails again with the same error
message, the SFP module might be defective.
Error Message PHY-4-EXCESSIVE_ERRORS: Excessive FCS, data, or idle word errors found
on interface [chars].
Note This message applies only to Catalyst 3750, 3560, 2975, 2970, and 296 0 switches.
Explanation The system detected excessive frame check sequence (FCS), data word, or idle word
errors on the specified interface. [chars] is the interface.
Recommended Action Enter the show interface privileged EXEC command on the specified
interface, and check for cyclic redundancy check (CRC) and other input errors. If errors are
excessive, enter the shutdown interface configuration command and then the no shutdown interface
configuration command to reset the interface.