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RE: Vmotion with error message 'invalid configuration for device '13' 

Jan 14, 2026 12:31 PM
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Mar 05, 2026 01:45 AM

Hello 

As per Error message provided in thread (Incompatible device backing specified for device "13") which seems to be similar or matches with VMware articles

Reference Articles
https://knowledge.broadcom.com/external/article/313139




As per attached screenshot, it seems to be that you have selected settings for network switch. I will recommend below options to be set for this.


Top VMware Network Switch Best Practices (Security)
Promiscuous Mode: REJECT
Why: When set to "Accept," a virtual machine can read all packets passing through the vSwitch that it is allowed to see via VLAN policies, enabling sniffing.
Best Practice: Keep "Reject" (default) for all production workloads.
Exception: Only set to "Accept" for specific security VMs, such as network monitoring tools or virtual IDS/IPS, and apply this exception only to the specific portgroup those VMs are connected to.
MAC Address Changes: REJECT
Why: If set to "Accept," the guest OS can change its effective MAC address to something other than the initial MAC address assigned by vSphere.
Best Practice: Set to "Reject" to prevent malicious MAC impersonation.
Exception: Set to "Accept" for Microsoft Network Load Balancing (NLB) in unicast mode.
Forged Transmits: REJECT
Why: If set to "Accept," the vSwitch does not compare the source MAC address and effective MAC address, allowing VMs to send traffic that appears to come from another source.
Best Practice: Set to "Reject" to prevent unauthorized MAC spoofing.
Exception: Set to "Accept" for Microsoft NLB in both unicast and multicast modes

Below are the reference articles
https://knowledge.broadcom.com/external/article/427110
https://knowledge.broadcom.com/external/article/324553
https://knowledge.broadcom.com/external/article/414968

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