RHEL network interface dropping packets

Solution Verified - Updated -

Issue

  • System dropping network packets
  • High number of drop counters like drop, discard, err or error, fifo, buf or buffer, fail, miss, OOB, full counters in ethtool -S
  • High number of dropped, error, overrun, or frame counters in ifconfig
  • What is the first thing to try when I see my network interfaces dropping packets?

Environment

  • Red Hat Enterprise Linux (all versions)
  • Network interfaces
  • Applications reporting loss of data (cluster fence, slow performance, timeouts, failed backups, etc)

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