Administrator Guide

After an IP address is leased to a client, only that client may release the address. Dell EMC Networking OS performs a IP + MAC source
address validation to ensure that no client can release another clients address. This validation is a default behavior and is separate from IP
+MAC source address validation.
Configuration Tasks
To configure DHCP, an administrator must first set up a DHCP server and provide it with configuration parameters and policy information
including IP address ranges, lease length specifications, and configuration data that DHCP hosts need.
Configuring the Dell system to be a DHCP server is a three-step process:
1. Configuring the Server for Automatic Address Allocation
2. Specifying a Default Gateway
Related Configuration Tasks
• Configure a Method of Hostname Resolution
• Creating Manual Binding Entries
• Debugging the DHCP Server
• Using DHCP Clear Commands
Excluding Addresses from the Address Pool
The DHCP server assumes that all IP addresses in a DHCP address pool are available for assigning to DHCP clients.
You must specify the IP address that the DHCP server should not assign to clients.
To exclude an address, follow this step.
• Exclude an address range from DHCP assignment. The exclusion applies to all configured pools.
DHCP mode
excluded-address
Specifying an Address Lease Time
To specify an address lease time, use the following command.
• Specify an address lease time for the addresses in a pool.
DHCP <POOL>
lease {days [hours] [minutes] | infinite}
The default is 24 hours.
Specifying a Default Gateway
The IP address of the default router should be on the same subnet as the client.
To specify a default gateway, follow this step.
• Specify default gateway(s) for the clients on the subnet, in order of preference.
DHCP <POOL>
default-router address
Configure a Method of Hostname Resolution
Dell systems are capable of providing DHCP clients with parameters for two methods of hostname resolution—using DNS or NetBIOS
WINS.
Using DNS for Address Resolution
A domain is a group of networks. DHCP clients query DNS IP servers when they need to correlate host names to IP addresses.
1. Create a domain.
Dynamic Host Configuration Protocol (DHCP)
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