Specifications

CHAPTER
5-1
Catalyst 6500 Series Switch and Cisco 7600 Series Router Network Analysis Module Installation and Configuration Note
78-16413-01
5
Troubleshooting the Network Analysis Module
This chapter describes how to troubleshoot the NAM and includes these sections:
• Netflow Data Export, page 5-1
• Error Messages, page 5-8
• Web Username and Password Guidelines, page 5-14
• Supported MIB Objects, page 5-15
• Local Interfaces in the NAM ifTable, page 5-19
Note Additional troubleshooting help is available to the NAM Traffic Analyzer application users in the online
help “Troubleshooting” section.
Netflow Data Export
This section contains troubleshooting information for NDE.
Web Application
Explanation When you are on the Monitor > Hosts, Monitor > Apps, or Monitor > Conversations
page, the data shows only every other or more auto-refresh cycles. This problem is caused by the
implementation operation of the NDE source device. Entries in the NetFlow cache are expired after
being inactive for a time, when the end of a connection is detected, or when the expiration time has
been reached. The expired flow is exported to the destination. If the aging time is longer than the
NAM refresh interval, there will be no expired flows and NetFlow packets flow in one refresh
interval of the NAM.
Recommended Action To solve the problem, either increase the auto refresh interval on the Setup >
Preferences menu, or change the aging time of the NetFlow entries. Before you make any change to
the aging time at the NDE source device, refer to the NDE usage guidelines for performance issues.
Cisco IOS:
For the MSFC or routers, use the following command to specify the aging time:
Router(config)# ip flow-cache timeout "active" || "inactive" seconds
Router(config)# mls aging “
fast time” | “ long” | “ normal” seconds