Cross-vCenter migration requires network connectivity between both vCenter instances and the ESXi hosts. VMware documentation specifies the following requirements:
Both vCenters must be reachable over TCP 443 (management communication).
ESXi hosts must communicate over TCP 8000 and 902 for vMotion and NFC data transfer.
Both environments must have routed network connectivity to allow migration traffic.
Cross vCenter Migration and Clone requirements in VMware vSphere 6.x and later
VMware vCenter Server 7.0.x
VMware vCenter Server 8.0.x
Cross-vCenter migrations between different subnets require routed Layer 3 network connectivity between the source and destination vCenter Servers, as well as their associated ESXi hosts.
An isolated subnet without proper routing will not support these migration operations.
Ensure that Layer 3 connectivity exists between the vCenter Server instances. Proper connectivity is required for successful cross-vCenter operations. For detailed guidance and requirements regarding cross-vCenter migrations, please follow the Broadcom Knowledge Base article:
Cross vCenter Migration and Clone requirements in VMware vSphere 6.x and later
This article provides the recommended prerequisites and considerations to ensure migration operations function correctly.
For other related information, see: