DHCP Server Configuration in NSX-T 2.4

DHCP Server (Dynamic Host Configuration Protocol Server) allows clients to automatically obtain network configuration, such as IP address, subnet mask, default gateway, and DNS configuration, from a DHCP server. You can create DHCP servers to handle DHCP requests.

Create a DHCP Server

Navigate to Networking > IP Address Management > DHCP
Click Add
Select DHCP Server as the Server Type
Enter a Server Name
Enter a Server IP Address in CIDR format
1. This step will create a logical switch and connect the DHCP server to it.
2. This interface will appear on the Tier1 LR as a connected interface, so make sure you choose a non-overlapping subnet for the Tier1 gateway you want to assign the DHCP server to. I use a /30 for this purpose.
3. The subnet range used here does NOT get advertised to the connected Tier-0 gateway, but DOES appear in the Tier-1 Gateways forwarding table
Select an edge cluster to run the DHCP server on
Click Save

Assign DHCP Server to Tier-1/Tier-0 Gateway

Navigate to Networking > Tier-1/Tier-0 Gateways
Edit an existing Tier-1/Tier-0 Gateway
Select the No IP Allocation hyperlink next to IP Address Management
Select DHCP Local Server from the Type dropdown list
Use the DHCP Server dropdown to select the appropriate DHCP Server
Click Save
Click Save

Configure DHCP Address Allocation on a segment

Navigate to Networking > Segments
Add/Edit a Segment
Ensure that the Segment is associated with a Tier0/Tier-1 gateway
Select Set Subnets if no subnet allocation exist on the subnet
Select the numbered hyperlink under the Subnets if there are existing Subnets configured on the Segment
Add/Edit Subnet
Enter the appropriate DHCP Ranges and click Add
Click Apply
Click Save