Brocade Multi-Service IronWare Administration Guide (Supporting R05.6.00) - Manual (Page 99)

Multi-Service IronWare Administration Guide 81
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Disabling CAM table entry aging
2
NOTE
Statistics for an interface will be different between the CLI and SNMP if snmp-server
preserve-statistics is configured and the clear commands listed above are executed.
Disabling CAM table entry aging
By default if no traffic hits a programmed flow-based content addressable memory (CAM) table
entry, the CAM entry is removed from the system’s CAM table. Depending on your network needs,
however, you might have to disable the default behavior and force the system to retain CAM entries
even when no traffic hits them. You can stop and start the CAM aging feature by using the hw-aging
command in the global configuration mode.
Syntax: hw-aging disable | enable
The disable option prevents CAM entries from aging out. Even if no traffic hits a particular CAM
entry, the entry remains in the CAM table.
The enable option returns the system to the default mode and unused CAM age out of the CAM
table.
Data integrity protection
Data integrity protection provides a way to detect and report potential problems with the internal
data path of the network processor. It also allows you to tune the detection and reporting of these
types of problems. In addition, a show command is provided to display the status of the system.
Configuring Detection Parameters
Several parameters can be configured to support this data integrity protection: rolling window time
frame and the event thresholds for ingress and egress buffer events. The configurations are
applied system wide.
Rolling Window Time Frame
Data integrity protection implements a rolling window to calculate the most recent history of errors.
The rolling window time frame is the period of time error events are recorded. Data integrity
protection polls for events every 500 milliseconds and updates the current window.
Brocade(config)# system np rolling-window 10
Syntax: [no] system np rolling-window window size
The window size parameter sets the rolling window time frame. The allowable window time is 10 to
60 seconds. Setting to 0 seconds will disable error monitoring.
The [no] option returns the threshold to the default setting.