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DHCP Server Commands
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D E L L C O N F ID E N T IA L – P R E L IM I N A RY 5 / 1 5 /1 2 - F O R P R O O F O N LY
current set of DHCP options are documented in RFC 2131,
Dynamic Host
Configuration Protocol
.
For options in hexadecimal format, the string parameter should include all
the bytes in the option value, including leading zeros.
Examples
The following example configures DHCP option 19, which specifies whether
the client should configure its IP layer for packet forwarding. A value of 0
means disable Ip forwarding. A value of 1 means enable IP forwarding. IP
forwarding is enabled in the following example.
Console(config-dhcp)#
option
19
hex
01
The following example configures DHCP option 2, which specifies the offset
of the client's subnet in seconds from Coordinated Universal Time (UTC). A
value of 0xE10 in the following example indicates a location 1 hour east of
the meridian.
Console(config-dhcp)#
option
2
hex
00000E10
The following example configures DHCP option 72, which specifies the
World Wide Web servers for DHCP clients. World Wide Web servers
172.16.3.252 and 172.16.3.253 are configured in the following example.
Console(config-dhcp)#
option ip-list
72 172.16.3.252
172.16.3.253
ip dhcp excluded-address
Use the
ip dhcp excluded-address
Global Configuration mode command to
specify the IP addresses that a Dynamic Host Configuration Protocol
(DHCP) Server should not assign to DHCP clients. Use the
no
form of this
command to remove the excluded IP addresses.
Syntax
ip dhcp excluded-address
low-address
[
high-address
]
no ip dhcp excluded-address
low-address
[
high-address
]
