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21-78
Cisco MDS 9000 Family Command Reference
OL-16217-01, Cisco MDS SAN-OS Release 3.x
Chapter 21 S Commands
switchport ignore bit-errors
switchport ignore bit-errors
To prevent the detection of bit error threshold events from disabling the interface on Fibre Channel
interfaces, use the switchport ignore bit-errors command. To revert to the default, use the no form of
the command.
switchport ignore bit-errors
no switchport ignore bit-errors
Syntax Description This command has no arguments or keywords.
Defaults None.
Command Modes Interface configuration submode.
Command History
Usage Guidelines The bit error rate threshold is used by the switch to detect an increased error rate before performance
degradation seriously affects traffic.
Bit errors can occur for the following reasons:
• Faulty or bad cable
• Faulty or bad GBIC or SFP
• GBIC or SFP is specified to operate at 1 Gbps but is used at 2 Gbps
• Short haul cable is used for long haul or long haul cable is used for short haul
• Momentary sync loss
• Loose cable connection at one or both ends
• Improper GBIC or SFP connection at one or both ends
A bit error rate threshold is detected when 15 error bursts occur in a 5-minute period. By default, the
switch disables the interface when the threshold is reached. You can issue a shutdown/no shutdown
command sequence to reenable the interface.
Note Regardless of the setting of the switchport ignore bit-errors command, the switch generates a syslog
message when bit error threshold events are detected.
Examples The following example shows how to prevent the detection of bit error events from disabling the
interface.
Release Modification
2.1(1a) This command was introduced.
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