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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 .
To configure data field size, 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 fcrxbufsize 2000
Beacon Mode
By default, the beacon mode is disabled on all switches. The beacon mode is indicated by a flashing
green light that helps you identify the physical location of the specified interface.
The beacon command has no effect on the operation of the interface.
To enable beacon mode for a specified interface or range of interfaces, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# interface fc1/1
switch(config-if)#
Step 3
switch(config-if)# switchport beacon
switch(config-if)# no switchport beacon
The flashing green light turns on automatically when an external loopback is detected that causes the
Note
interfaces to be isolated. The flashing green light overrides the beacon mode configuration. The state of
the LED is restored to reflect the beacon mode configuration after the external loopback is removed.
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Fibre Channel Interfaces
Purpose
Enters configuration mode.
Configures the specified interface.
Reduces the data field size for the selected
interface to 2000 bytes. The default is 2112
bytes and the range is from 256 to 2112 bytes.
Purpose
Enters configuration mode.
Configures the specified interface.
Enables the beacon mode for the interface.
Disables the beacon mode for the interface.
Cisco MDS 9000 Family Configuration Guide
11-17
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