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Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1
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Appendix E Troubleshooting
Troubleshooting the ASA 5500 AIP SSM
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For More Information
For detailed information about the Normalizer engine, see
Normalizer Engine
.
The ASA 5500 AIP SSM and the Data Plane
Symptom
The ASA 5500 AIP SSM data plane is kept in the Up state while applying signature updates.
You can check the ASA 5500 AIP SSM data plane status by using the
show module
command during
signature updates.
Possible Cause
Bypass mode is set to off. The issue is seen when updating signatures, and when you
use either CSM or IDM to apply signature updates. This issue is not seen when upgrading IPS
system software.
The ASA 5500 AIP SSM and Jumbo Packet Frame Size
Refer to the following URL for information about ASA 5500 AIP SSM jumbo packet frame size:
http://www.cisco.com/en/US/docs/security/asa/asa84/configuration/guide/interface_start.html#wp1328
86
9
Note
A jumbo frame is an Ethernet packet that is larger than the standard maximum of 1518 bytes (including
Layer 2 header and FCS).