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Software and Firmware Upgrade Fails "Error "[/]% Error reading image file"

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TitleSoftware and Firmware Upgrade Fails "Error "[/]% Error reading image file"
Symptoms
  • ERS 3500 switches failing upgrade from 5.3.1 to 5.3.9
  • Failure includes attempts to download firmware and software files
  • Firmware file eventually downloads after multiple attempts
  • Software file consistently fails to download
  • System log indicates spanning tree new root bridge on each failed download attempt
I    1991-06-18 14:49:05 GMT+00:00 346      Trap: RSTP New Root: 80:00:64:C3:54:F6:70:00
I    1991-06-18 14:49:06 GMT+00:00 347      Trap: RSTP New Root: 30:00:70:7C:69:D3:CC:00
I    1991-06-18 14:49:11 GMT+00:00 348      Trap: RSTP New Root: 80:00:64:C3:54:F6:70:00
I    1991-06-18 14:49:12 GMT+00:00 349      Trap: RSTP New Root: 30:00:70:7C:69:D3:CC:00
W    1991-06-18 14:51:25 GMT+00:00 350  NVR Download - TFTP timeout OR image file not found

 
Environment
  • ERS 3500
  • Release 5.3.1
Cause
New root bridge causing spanning tree convergence which causes disruption in traffic
Resolution
Fix and/or adjust spanning tree priority on switches in the network to eliminate excessive root bridge changes that lead to spanning tree convergence and traffic disruption
Additional notes

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