Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
6 DHCP
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
272
6.4.2 Preparing for configurations
Scenario
Options 18, 37, 61, and 82 in DHCP Option are relay information options in DHCP packets.
When request packets from DHCP clients reach the DHCP server, DHCP Relay or DHCP
Snooping added Option field into request packets if request packets pass the DHCP relay
device or DHCP snooping device is required.
Options 18, 37, 61, and 82 are used to record DHCP client information on the DHCP server.
By cooperating with other software, it can implement functions such as limit on IP address
distribution and accounting.
Prerequisite
N/A
6.4.3 Default configurations of DHCP Option
Default configurations of DHCP Option are as below.
Function
Default value
attach-string in global configuration mode
N/A
remote-id in global configuration mode
Switch-mac
circuit-id in interface configuration mode
N/A
6.4.4 Configuring DHCP Option fields
Configure DHCP Option fields for the ISCOM2600G-HI series switch as below.
All the following steps are optional and in any sequence.
Step
Command
Description
1
Raisecom#config
Enter global
configuration mode.
2
Raisecom(config)#ip dhcp information option
attach-string
attach-string
(Optional) configure
additional information
for Option 82 field.
Raisecom(config)#interface
interface-type
interface-number
Raisecom(config-gigaethernet1/1/port)#ip
dhcp information option circuit-id
circuit-
id
[ prefix-mode ]
(Optional) configure
circuit ID sub-option
information for Option
82 field on the interface.
Raisecom(config-gigaethernet1/1/port)#ip
dhcp option vlan
vlan-id
description
string
Raisecom(config-gigaethernet1/1/port)#exit
(Optional) configure the
interface or VLAN
description to be padded
into Option 82 fields.