Detected Tx Unit Hang

Feb 26 08:11:55 RBVLM02 kernel: e1000 0000:02:00.0: eth0: Detected Tx Unit Hang
Feb 26 08:11:55 RBVLM02 kernel:   Tx Queue             <0>
Feb 26 08:11:55 RBVLM02 kernel:   TDH                  <56>
Feb 26 08:11:55 RBVLM02 kernel:   TDT                  <fe>
Feb 26 08:11:55 RBVLM02 kernel:   next_to_use          <fe>
Feb 26 08:11:55 RBVLM02 kernel:   next_to_clean        <56>
Feb 26 08:11:55 RBVLM02 kernel: buffer_info[next_to_clean]
Feb 26 08:11:55 RBVLM02 kernel:   time_stamp           <260e35450>
Feb 26 08:11:55 RBVLM02 kernel:   next_to_watch        <58>
Feb 26 08:11:55 RBVLM02 kernel:   jiffies              <260e359dd>
Feb 26 08:11:55 RBVLM02 kernel:   next_to_watch.status <0>

What does it mean ?

My configuration is VLM2000 (Vers:7.0-8aVMware) with E1000 NIC

Thanks