Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

On an Aggregator configured as a DHCP client, you can release a dynamically-assigned IP address without removing the DHCP client operation on the interface.

• Release a dynamically-acquired IP address while retaining the DHCP client configuration on the interface. EXEC Privilege mode release dhcp interface type slot/port
• Acquire a new IP address with renewed lease time from a DHCP server. EXEC Privilege mode renew dhcp interface type slot/port