Cisco Cisco IPS 4255 Sensor 릴리즈 노트

Serviceability enhancements

Bypass error messages now indicate the reason for starting bypass.

The sensor goes in to bypass mode during long operations involving global correlation 
activities, database purges, configuration and signature updates, when bypass is manually set, 
and when the sensor becomes unresponsive because it is busy or has crashed. Previously bypass 
mode was logged but now the reason for entering bypass mode is also logged. 

The Analysis Engine now displays the relative load percentage.

You can display the relative load percentage by running the show statistics analysis-engine 
command. The relative load is calculated as the percentage of time spent in a particular 
inspector with the total of all utilized inspectors adding up to 100. Load percentage is shown 
when the SensorApp starts.

You cannot clear the load percentage because there is no clear command for inspector 
statistics.

Sample Output

Inspector       active call create delete createPct callPct loadPct

AtomicAdvanced  1      229  1      0      0         18      40

Fixed           0      941  330    330    0         0       36

Layer2ARP       1      542  1      0      0         0       24

The sensor now sends a warning message when you enable a retired signature.

You can enable retired signatures; however, the sensor ignores all retired signatures. You receive 
the following warning when you enable retired signatures:

Warning: Signature 5678:0 is retired by default. You can enable it, but it will be 

ignored.

Network participation data has been extended to gather sensor health statistics.

The sensor load, memory usage, and backlog level have been added to the health and status 
metrics in the Network Participation data. 

For more information on global correlation, for the CLI refer to 

, for 

the IDM refer to 

, and for the IME refer to 

For more information on bypass mode, for the CLI refer to 

IDM refer to 

Configuring Bypass Mode

, and for the IME refer to 

.

For more information on obtaining health and status metrics, for the CLI refer to 

, for the IDM refer to 

, and for the IME refer to