Filter
Top Products
DES-7200 Configuration Guide Chapter 4 DHCP Configuration
4-5
4.5.2 Configuring DHCP
Excluded Addresses
Unless configured particularly, the DHCP server tries to assign all the subnet
addresses defined in the address pool to the DHCP clients. If you want to
reserve some addresses, such as those that have been assigned to servers or
devices, you must define clearly that these addresses cannot be assigned to
the DHCP clients.
To configure the addresses that cannot be assigned to the DHCP clients,
execute the following commands in the global configuration mode:
Command Function
DES-7200(config)# ip dhcp
excluded-address
low-ip-address [ high-ip-address ]
Define a range of IP addresses that the
DHCP server will not assign to the DHCP
clients.
DES-7200(config)# no ip dhcp
excluded-address
low-ip-address [ high-ip-address ]
Remove the configuration.
A good practice in configuring the DHCP server is to prohibit the DHCP server
from assigning any address that has been assigned specifically. This provides
two advantages: 1) No address conflict will occur; 2) When DHCP assigns
addresses, the time for detection is shortened and thus DHCP will perform
assignment more efficiently.
4.5.3 Configuring DHCP
Address Pool
Both DHCP Address assignment and DHCP parameters sent to the client
should be defined in the DHCP address pool. If no DHCP address pool is
configured, addresses cannot be assigned to the DHCP clients even though the
DHCP server has been enabled. However, if the DHCP server has been
enabled, the DHCP relay agent is always working regardless of the DHCP
address pool.
You can give a meaningful name that can be memorized easily to the DHCP
address pool. The name of address pool contains characters and digits.
DES-7200 product allows you to define multiple address pools. The IP address
of the DHCP relay agent in the DHCP request packet is used to determine
which address pool is used for address assignment.
z If the DHCP request packet does not contain the IP address of the DHCP
relay agent, the address that is in the same subnet or network as the IP
address of the interface that receives the DHCP request packet is assigned