Allied Telesis AT-WR4500 Dhcp Relay, Use this option in Dhcp server network list, Name Code Value

124	AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers
	RouterOS v3 Configuration and User Guide

Property Description

code (integer: 1..254) - dhcp option code. All codes are available at http://www.iana.org/assignments/bootp-dhcp-parameters name (name) - descriptive name of the option

value (text) - parameter's value in form of a string. If the string begins with "0x", it is assumed as a hexadecimal value

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The defined options you can use in /ip dhcp-server network submenu

According to the DHCP protocol, a parameter is returned to the DHCP client only if it requests this parameter, specifying the respective code in DHCP request Parameter-List (code 55) attribute. If the code is not included in Parameter-List attribute, DHCP server will not send it to the DHCP client.

Example

This example shows how to set DHCP server to reply on DHCP client's Hostname request (code 12) with value Host-A.

Add an option named Option-Hostnamewith code 12 (Hostname) and value Host-A:

[admin@AT-WR4562] ip dhcp-server option> add name=Hostname code=12 \ value="Host-A"

[admin@AT-WR4562] ip dhcp-server option> print

#	NAME	CODE	VALUE
0	Option-Hostname	12	Host-A
[admin@AT-WR4562] ip dhcp-server option>

Use this option in DHCP server network list:

[admin@AT-WR4562] ip dhcp-server network> add address=10.1.0.0/24 \

\... gateway=10.1.0.1 dhcp-option=Option-Hostname dns-server=159.148.60.20 [admin@AT-WR4562] ip dhcp-server network> print detail

0 address=10.1.0.0/24 gateway=10.1.0.1 dns-server=159.148.60.20 dhcp-option=Option-Hostname

[admin@AT-WR4562] ip dhcp-server network>

Now the DHCP server will reply with its Hostname Host-Ato DHCP client (if requested)

6.1.9 DHCP Relay

Submenu level: /ip dhcp-relay

Description

DHCP Relay is just a proxy that is able to receive a DHCP request and resend it to the real DHCP server

Property Description

delay-threshold(time; default: none) - if secs field in DHCP packet is smaller than delay-threshold, then this packet is ignored

dhcp-server(text) - list of DHCP servers' IP addresses which should the DHCP requests be forwarded to

interface (name) - interface name the DHCP relay will be working on

local-address(IP address; default: 0.0.0.0) - the unique IP address of this DHCP relay needed for DHCP server to distinguish relays:

0.0.0.0- the IP address will be chosen automatically name (name) - descriptive name for relay

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DHCP relay does not choose the particular DHCP server in the dhcp-server list, it just sent to all the listed servers.