Standalone backup agent for Microsoft Windows servers and workstations (formerly Veeam Endpoint Backup FREE)
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StevenMeier
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Full Name: Steven Meier
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Agent Backup error "Error: Invalid packet size. Payload size:"

Post by StevenMeier »

Hi folks I am sure some one has seen this before

The error is on a windows 10 Machine with the Agent doing a backup. I have logged a support request but it seems to be stalled Case #07304089

I get this error about 5 minutes into the job. I am only backup up the C: Drive.

Windows 10 is up to date and joined to a domain. The agent is up to date . No Disk or Network Issues . We back up about 30 Agents and all work fine except this.
The error is so vague and the machine was working fine and nothing on it has changed......

As Part of the support request I have already uploaded the logs and nothing came back that helped narrow it down or pointed us in the correct direction.

Code: Select all

4/06/2024 11:39:13 AM :: Error: Invalid packet size. Payload size: [576979436]. Allocation size: [1048832] Unable to retrieve next block transmission command. Number of already processed blocks: [16537]. Failed to download disk '48c5ed97-de64-4586-a6ac-6c5b621c1d05'. write: An existing connection was forcibly closed by the remote host Failed to upload disk. Skipped arguments: [EmulatedDiskSpec>]; Agent failed to process method {DataTransfer.SyncDisk}
Mildur
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Full Name: Fabian K.
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Re: Agent Backup error "Error: Invalid packet size. Payload size:"

Post by Mildur »

Hello Steven

To me the error message looks network related. From the case notes I can see that the initial investigation is still ongoing.
If you are unhappy about the progress of the case, please use the Talk To a Manager button to escalate the case:
https://www.veeam.com/kb2320

Best,
Fabian
Product Management Analyst @ Veeam Software
StevenMeier
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Full Name: Steven Meier
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Re: Agent Backup error "Error: Invalid packet size. Payload size:"

Post by StevenMeier »

Hi Fabian,

I would be happy to accept that if the Network was causing issues for the Machine in its day to day work and in regards to Veeam we have another 5 boxes on same IP subnet and same switch backing up bigger loads 100% with No Issue .....
StevenMeier
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Full Name: Steven Meier
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Re: Agent Backup error "Error: Invalid packet size. Payload size:"

Post by StevenMeier »

Still working on this With Support......
I have changed the Physical network card...no change
I changed the Cable to the wall.
This is a brand new building (less than a year OLD...so its not the structured cabling but changed the port on the brand new cisco switch and the port in the wall...no change.
Looking more like something MS related. Investigation on going.
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