Managing DHCP Service

NSX Edge supports IP address pooling and one-to-one static IP address allocation. Static IP address binding is based on the vCenter managed object ID and interface ID of the requesting client.

NSX Edge DHCP service adheres to the following guidelines:

• Listens on the NSX Edge internal interface for DHCP discovery.
• Uses the IP address of the internal interface on NSX Edge as the default gateway address for all clients (except for non-directly connected pools), and the broadcast and subnet mask values of the internal interface for the container network.

Note: By design, DHCP service is supported on the internal interfaces of an NSX Edge. However, in some situations, you may choose to configure DHCP on an uplink interface of the edge and configure no internal interfaces. In this situation, the edge can listen to the DHCP client requests on the uplink interface, and dynamically assign IP addresses to the DHCP clients. Later, if you configure an internal interface on the same edge, DHCP service stops working because the edge starts listening to the DHCP client requests on the internal interface.

You must restart the DHCP service on client virtual machines in the following situations:

• You changed or deleted a DHCP pool, default gateway, or DNS server.
• You changed the internal IP address of the NSX Edge instance.