With VMware NSX 6.2 and UDLR, there is an option to enable egress optimization to avoid the potential for hairpinning of the WAN network for the default gateway. For more information about egress optimization, see Local Egress.

This design leverages local egress so that traffic exits the data center through the local routing infrastructure even after a migration. This can cause some potential issues with client server communication if the physical network cannot manage the ingress routing to the workloads.