Sensor Not Seeing Packets - Cisco IPS-4255-K9 - Intrusion Protection Sys 4255 Installation Manual

Chapter A Troubleshooting
Total Transmit Errors = 1
Total Transmit FIFO Overruns = 0
sensor#
Check for alerts.
Step 5
sensor# show statistics virtual-sensor
SigEvent Preliminary Stage Statistics

Sensor Not Seeing Packets

If the sensor is not seeing any packets on the network, you could have the interfaces set up incorrectly.
If the sensor is not seeing packets, follow these steps:
Log in to the CLI.
Step 1
Make sure the interfaces are up and receiving packets.
Step 2
sensor# show interfaces GigabitEthernet0/1
MAC statistics from interface GigabitEthernet0/1
Media Type = backplane
Missed Packet Percentage = 0
Inline Mode = Unpaired
Pair Status = N/A
Link Status = Down
Link Speed = Auto_1000
Link Duplex = Auto_Full
Total Packets Received = 0
Total Bytes Received = 0
Total Multicast Packets Received = 0
Total Broadcast Packets Received = 0
Total Jumbo Packets Received = 0
Total Undersize Packets Received = 0
Total Receive Errors = 0
Total Receive FIFO Overruns = 0
Total Packets Transmitted = 0
Total Bytes Transmitted = 0
Total Multicast Packets Transmitted = 0
Total Broadcast Packets Transmitted = 0
Total Jumbo Packets Transmitted = 0
Total Undersize Packets Transmitted = 0
Total Transmit Errors = 0
Total Transmit FIFO Overruns = 0
sensor#
If the interfaces are not up, do the following:
Step 3
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•
OL-18504-01
Number of Alerts received = 0
Number of Alerts Consumed by AlertInterval = 0
Number of Alerts Consumed by Event Count = 0
Number of FireOnce First Alerts = 0
Number of FireOnce Intermediate Alerts = 0
Number of Summary First Alerts
Number of Summary Intermediate Alerts
Number of Regular Summary Final Alerts
Number of Global Summary Final Alerts
Number of Alerts Output for further processing = 0alertDetails: Traffic Source: int0 ;
Check the cabling.
Enable the interface.
Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.0
= 0
= 0
= 0
= 0
Troubleshooting the Appliance
A-35