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Chapter 11
Configuring Interfaces
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
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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 shutdown/no shutdown
command sequence to reenable the interface.
As of Cisco MDS SAN-OS Release 2.1(1a), you can configure the switch to not disable an interface
when the threshold is crossed. By default, the threshold disables the interface.
To disable the bit error threshold for an interface, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface fc1/1
switch(config-if)#
Step 3
switch(config-if)# switchport ignore
bit-errors
switch(config-if)# no switchport ignore
bit-errors
Regardless of the setting of the switchport ignore bit-errors command, the switch generates a syslog
Note
message when bit error threshold events are detected.
Switch Port Attribute Default Values
You can configure attribute default values for various switch port attributes. These attributes will be
applied globally to all future switch port configurations, even if you do not individually specify them at
that time.
To configure switch port attributes, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# no system default
switchport shutdown
switch(config-if)#
switch(config)# system default
switchport shutdown
switch(config-if)#
switch(config)# system default
switchport trunk mode auto
switch(config-if)#
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Loose cable connection at one or both ends
Improper GBIC or SFP connection at one or both ends
Purpose
Enters configuration mode.
Configures the specified interface.
Prevents the detection of bit error threshold
events from disabling the interface.
Prevents the detection of bit error threshold
events from enabling the interface.
Purpose
Enters configuration mode.
Configures the default setting for administrative state of an
interface as Up. (The factory default setting is Down).
This command is applicable only to interfaces for
Tip
which no user configuration exists for the
administrative state.
Configures the default setting for administrative state of an
interface as Down. This is the factory default setting.
This command is applicable only to interfaces for
Tip
which no user configuration exists for the
administrative state.
Configures the default setting for administrative trunk mode
state of an interface as Auto.
(The factory default setting is trunk mode On).
Cisco MDS 9000 Family Configuration Guide
Fibre Channel Interfaces
11-19
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