igb message "Detected Tx Unit Hang" appears on a Red Hat Enterprise Linux 5 system

Solution Unverified - Updated -

Issue

  • The following message is seen in the logs, and the system is unreachable over the network :

    Sep 29 13:43:55 hostname kernel: igb 0000:0b:00.0: Detected Tx Unit Hang
Sep 29 13:43:55 hostname kernel:   Tx Queue             <0>
Sep 29 13:43:55 hostname kernel:   TDH                  <94>
Sep 29 13:43:55 hostname kernel:   TDT                  <2e>
Sep 29 13:43:55 hostname kernel:   next_to_use          <2e>
Sep 29 13:43:55 hostname kernel:   next_to_clean        <92>
Sep 29 13:43:55 hostname kernel: buffer_info[next_to_clean]
Sep 29 13:43:55 hostname kernel:   time_stamp           <100448d89>
Sep 29 13:43:55 hostname kernel:   next_to_watch        <93>
Sep 29 13:43:55 hostname kernel:   jiffies              <100456c3b>
Sep 29 13:43:55 hostname kernel:   desc.status          <328200>

Environment

  • Red Hat Enterprise Linux (RHEL) 5

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