Dasan V5808 - DHCP Option; Entering DHCP Option Mode; DHCP Option Format

User Manual UMN:CLI
V5808
339
8.5.5 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
configuration 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 information 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
globally 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
8.5.5.1 Entering DHCP Option Mode
To enter the DHCP option mode, use the following command.
Command
Mode
Description
ip dhcp option format NAME
Global
Enters the DHCP option mode.
NAME: DHCP option format name