WS-C4507R Switch (Supervisor V-10GE / IOS - cat4000-i9k91s-mz.122-25.EWA12.bin) is generating the below logs - %C4K_HWNETFLOWMAN-4-FLOWSLOSTERR: Netflow stats lost either due to hardware hash collisions or full hardware flow table. Stats lost for 128159929 packets. - The below mentioned actions have been carried out, but still the issue persists.
- Netflow has been disabled from global config mode and enabled on the required interfaces - Flow aggregation and flow/cache timeouts have been enabled - Not seeing any bug which can generate these log messages - Show platform hardware netflow statistics utilization output shows - Total Used 8192 (100.0% - Bucket Count) 131017 ( 99.9% - Used Entry Count)
Please let me know the root cause behind this log message. Is there any way to suppress the generation of this log?
sounds like the netflow table is overflowing . Sounds like you need to adjust how often it is throwing out idle flows . Adjust the timers so that they are shorter. Don't know of a way to keep them out of the logs..
Ensures that flows that have finished are periodically exported. The default value is 15 seconds. You can choose any number of seconds between 10 and 600. However, if you choose a value greater than 250 seconds, NetFlow Analyzer may report traffic levels that are too low.
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