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Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 2 Configuring Interfaces
Configuring Interfaces
Note The no-credit timeout value and stuck frame timeout value are interlinked. The no-credit timeout value
must always be greater than the stuck frame timeout value.
To configure the no-credit timeout value, follow these steps:
Configuring Credit Loss Recovery Threshold and Action
When the port detects the credit loss condition and recovers, then the port can be error-disabled, a trap
can be sent with interface details, and a syslog can be generated with interface details. When the
configured threshold is exceeded, one or more of these actions can be combined together. These actions
can be turned on or off depending on situation. The port monitor feature provides the command line
interface to configure the thresholds and action.
The thresholds are that the credit loss recovery can be between 1 and 10 and the interval can be 1 second
to 1 hour. The default value is 3 in 10 minutes and generates a syslog.
When the port sees the credit loss condition and fails to recover, the port flaps. This function is already
part of port guard, and you can configure the supported actions using the Port Guard feature.
To configure credit loss recovery threshold and action, refer to the following example. The following
example shows the credit loss recovery threshold and action configuration:
switch# show port-monitor
Policy Name : Cisco
Admin status : Active
Oper status : Active
Port type : All Ports
------------------------------------------------------------------------------------------
Counter Threshold Interval Rising Threshold event Falling Threshold
event Portguard
------- --------- -------- ---------------- ----- ------------------ ----- --------- ---
Link Loss Delta 60 5 4 1 4
Not enabled
Sync Loss Delta 60 5 4 1 4
Not enabled
Protocol Error Delta 60 1 4 0 4
Not enabled
Signal Loss Delta 60 5 4 1 4
Not enabled
Invalid Words Delta 60 1 4 0 4
Not enabled
Invalid CRC's Delta 60 5 4 1 4
Not enabled
RX Performance Delta 60 2147483648 4 524288000 4
Not enabled
TX Performance Delta 60 2147483648 4 524288000 4
Not enabled
TX Discards Delta 60 200 4 10 4
Not enabled
Command Purpose
Step 1
switch# config t
Enters configuration mode.
Step 2
switch(config)# system timeout
no-credit-drop
seconds
mode E|F
Specifies the no-credit timeout value and port
mode for the switch.
switch(config)# system timeout
no-credit-drop default mode E|F
Specifies the default no-credit timeout value port
mode for the switch.
