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Cisco Bug: CSCuj56114 - Performance issues w/ Policy Propagation Facility (PPF) for netflow prog

Last Modified

Jun 18, 2020

Products (9)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 9508 Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases

5.2(4.84) 6.1(1)S53 6.1(2) 6.1(2)S23 6.1(3)S32 6.2(14) 6.2(5)NF(0.1) 6.2(8)S16

Description (partial)

Symptom:
In Nexus7000 with netflow configuration, one or more following symptoms are observed:

Applying configs (e.g., "copy bootdisk:backup running-config") takes longer time. 
E.g., 5 minutes (without netflow config) vs. 30 mins (with netflow configs)
As a result, control-plane protocols (like OSPF) takes longer time to converge.

Nexus7000 switch exporting netflow statistics even after configs are removed.
May report NFM-3-MONITOR_NOT_FOUND error messages.

ACL TCAMs in the hardware not updated even after netflow configs removed.
"show hardware access-list vlan X input statistics module Y" indicates netflow sampler/profile is still present in the hardware.

Saving the config with "copy run start" may report:
%NFM-4-NFM_DDB_WARNING: DDB warning: DDB Error: <hexadecimal>

Sampled netflow on F2 card does not collect or export any data.
Or, it exports with FlowSet ID not matching the Template ID.
Conditions:
The above-mentioned issues are seen in Sup1/Sup2E running 6.x releases.
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Bug Details Include

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  • Status
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