User Manual
UMN:CLI
V8102
409
9.6.4.3
DHCP Relay Agent Configuration
To display the information of DHCP relay related configuration, use the following com-
mand.
Command
Mode
Description
show ip dhcp relay
Enable
Global
Shows DHCP relay configurations.
9.6.5
DHCP Option
This function enables administrators to define DHCP options that are carried in the DHCP
communication between DHCP server and client or relay agent. The following indicates
the format of the DHCP options field.
Code
Length
Value
DHCP Option Format
1 byte
1 byte or variable
64 bytes
A code identifies each DHCP option. It can be expressed in value 0 to 255 by user con-
figuration and some of them are predefined in the standards. (128 ~ 254 is site specific) A
length can be variable according to value or can be fixed. A value contains actual infor-
mation such an IP address, string, or index, which is inserted into the DHCP packet.
Administrators can configure a DHCP option format in
DHCP Option
mode, which is glob-
ally used over the DHCP functions. The DHCP option format can be applied in other
DHCP software modules and the following figure indicates it.
DHCP Option Format
DHCP Server Option
DHCP Snooping Option
DHCP Option82 Sub-option
