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Barracuda NextGen Firewall X

Log message "csum failure" reported in klogd.log

  • Type: Knowledgebase
  • Date changed: 3 years ago
Solution #00005132 
This solution replies to:
- NG Firewall firmware versions 4.2.x,5.0.x, 5.2.x
- netfence firmware versions 4.2.x


The following error message is reported in the log file klogd (Box menu entry "Log" > "Box" > "System" > "klogd.log":


Info        kernel: udp v4 hw csum failure<notice lines> 



This log entry can have following causes:

  - The network interface card is receiving corrupt data on Ethernet level.
  - The network interface card driver is generating errors during checksum calculation.


Processes causing this error message have no harmful effect on the running system. Deactivation of HW checksumming will stop the message recording, if faulty checksum calculation has been the cause. If deactivation of HW checksumming is possible, depends on the available network interface card driver options.


Deactivation of HW checksumming for the e1000 driver:
Option: XsumRX=0  (0=off, 1=on)


Deactivation of HW checksumming for the e100 driver:
Option: XsumRX=0  (0=off, 1=on)



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