How to troubleshoot Diag bundle/PCAP generation failure from VCO for edges
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How to troubleshoot Diag bundle/PCAP generation failure from VCO for edges

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Article ID: 369911

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Updated On:

Products

VMware VeloCloud SD-WAN

Issue/Introduction

Troubleshooting Diag bundle  or PCAP failure.

  1. For a successful diag bundle or PCAP creation we do see below MGD logs from CLI. 
    mgd.log.20:2024-05-02T03:07:10.562 INFO    [diag (8081:Thread-224354:16730)] Generating diagnostic bundle into /velocloud/diagtmp/mgd-diag-dMmqwZ
    mgd.log.20:2024-05-02T03:07:16.540 INFO    [diag (8081:Thread-224357:16973)] Post standbygenerateDiagnosticBundle
    mgd.log.20:2024-05-02T03:07:22.105 INFO    [diag (8081:Thread-224359:17074)] Post standbygenerateDiagnosticBundle
    mgd.log.20:2024-05-02T03:07:27.525 INFO    [diag (8081:Thread-224359:17074)] Generated bundle, starting upload
    mgd.log.20:2024-05-02T03:07:18.217 INFO    [diag (8081:Thread-224357:16973)] Finished upload
  2. The maximum size for the diag bundle or PCAP generation is 180 MB. If it exceeds below logs could be seen. 
    2022-06-06T09:22:07.984 ERROR   [mgd (761:Thread-253745:3299)] Failed to upload diagnostic bundle: 413 Client Error: Request Entity Too Large

    2022-06-06T09:22:22.175..., Action Updates: [{"status": "ERROR", "responseData": {"message": "Failed to upload diagnostic bundle: 413 Client Error: Request Entity Too Large"}, "id

    ": 154}]
  3. If diag bundle or PCAP fails before starting upload step, check for space issue on /velocloud/ folder  or mgd log  failure reason to validate why it failed.  
    MGD log for the same:

    Failed to upload diagnostic bundle: [Errno 28] No space left on device: '/velocloud/diagtmp/mgd-diag-HcBD_B'

    To verify space Go to Cd /velocloud/ and use df -h command to verify space in velocloud has more than 180 mb.
  4. If diag bundle or PCAP  fails after starting upload, then this could be network transient issue or VCO issue.
  5. To verify transient ISP issue, take PCAP to validate if there is lot of retransmission or if any packets missing from both VCO and VCE end. 
  6. If we have any  HTTPS error code for diag bundle  please validate the HTTPS error code to isolate the cause.

Environment

Applicable to all SASE SDWAN edge versions.

Resolution

If issue still persist even after the troubleshooting please involve support.

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