Common Netflow Problems - Cisco Nexus 1000V Troubleshooting Manual

Common NetFlow Problems

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The above VEM commands (vemlog and vemcmd) are accessible on the VEM. These commands can be
executed from the VSM by preceding them with
module vem vem-number execute
For example:
VSM command: module vem 4 execute vemcmd show netflow monitor
VEM command: vemcmd show netflow monitor
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Common NetFlow Problems
Common NetFlow configuration problems on the VSM can occur if you attempt to do the following:
Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
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Displays event history errors.
show flow internal event-history msgs
Displays event history messages.
show flow internal ddb b
show flow internal mem-stats
Displays flow memory statistics to debug memory usage and leaks.
debug logfile filename—
Redirects the output of the following debug commands to a file stored in bootflash.
debug nfm all
–
vemlog debug sfnetflow_cache all
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vemlog debug sfnetflow_config all
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– vemlog debug sfnetflow_flowapi all
Enables NetFlow debugging for policy installation on the Virtual Ethernet Module (VEM). Debug
messages are printed for every PDL session open, verify, and commit requests that come from the
DPA.
vemlog debug sfnetflow_flowmon all
vemlog debug sfnetflow_ager all
vemlog debug sfnetflow all
Enables packet path debugging for NetFlow policies on the VEM. Debug messages are printed for
every packet that hits a NetFlow policy. Use this command with caution. High traffic could result in
lot of debug messages.
vemcmd show netflow monitor
Prints the monitor configuration.
vemcmd show netflow interface
Prints the interface configuration
vemcmd show netflow stats
Prints the tracked configuration failures.
show flow internal pdl detailed
Displays internal flow details.
Chapter 15 NetFlow
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