Users Guide

• prefix-length: specifies the number of bits used for the network portion of the address you
specify.
The prefix-length range is from 17 to 31.
4 Display the current pool configuration.
DHCP <POOL> mode
show config
After an IP address is leased to a client, only that client may release the address. Dell Networking OS performs
an 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.
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.
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
Dynamic Host Configuration Protocol (DHCP) 356