Use the vMotion TCP/IP stack to isolate traffic for vSphere vMotion and to assign a dedicated default gateway for vSphere vMotion traffic.

By using a separate TCP/IP stack, you can manage vSphere vMotion and cold migration traffic according to the topology of the network, and as required for your organization.

  • Route the traffic for the migration of virtual machines by using a default gateway that is different from the gateway assigned to the default stack on the ESXi host.
  • Assign a separate set of buffers and sockets.
  • Avoid routing table conflicts that might otherwise appear when many features are using a common TCP/IP stack.
  • Isolate traffic to improve security.
Table 1. vMotion TCP/IP Stack Design Decision
Decision ID Design Decision Design Justification Design Implication
NSXT-VI-NET-005 Use the vMotion TCP/IP stack for vSphere vMotion traffic. By using the vMotion TCP/IP stack, vSphere vMotion traffic can be assigned a default gateway on its own subnet and can go over Layer 3 networks. The vMotion TCP/IP stack is not available in the VMkernel adapter creation wizard of vSphere Distributed Switch. You must create the VMkernel adapter directly on the ESXi host.