D-Link xStack DES-3528 Series Cli Reference Guide

xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch CLI Reference Guide
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DES-3528:admin# config dhcp_relay delete ipif System 10.58.44.6
Command: config dhcp_relay delete ipif System 10.58.44.6
Success.
DES-3528:admin#
config dhcp_relay option_82 state
Purpose
Used to configure the state of DHCP relay agent information option 82 of the Switch.
Syntax config dhcp_relay option_82 state [enable | disable]
Description
This command is used to configure the state of DHCP relay agent information option 82 of
the Switch.
Parameters
enable − When this field is toggled to Enabled the relay agent will insert and remove DHCP
relay information (option 82 field) in messages between DHCP server and client. When the
relay agent receives the DHCP request, it adds the option 82 information, and the IP address
of the relay agent (if the relay agent is configured), to the packet. Once the option 82
information has been added to the packet it is sent on to the DHCP server. When the DHCP
server receives the packet, if the server is capable of option 82, it can implement policies like
restricting the number of IP addresses that can be assigned to a single remote ID or circuit
ID. Then the DHCP server echoes the option 82 field in the DHCP reply. The DHCP server
unicasts the reply to the back to the relay agent if the request was relayed to the server by
the relay agent. The Switch verifies that it originally inserted the option 82 data. Finally, the
relay agent removes the option 82 field and forwards the packet to the Switch port that
connects to the DHCP client that sent the DHCP request.
disable − If the field is toggled to disable the relay agent will not insert and remove DHCP
relay information (option 82 field) in messages between DHCP servers and clients, and the
check and policy settings will have no effect. The default setting is disable.
Restrictions
Only Administrator and Operator and Power-User-level users can issue this command.
Example usage:
To configure DHCP relay option 82 state:
DES-3528:admin# config dhcp_relay option_82 state enable
Command: config dhcp_relay option_82 state enable
Success.
DES-3528:admin#
config dhcp_relay option_82 check
Purpose
Used to configure the checking mechanism of DHCP relay agent information option 82 of the
Switch.
Syntax config dhcp_relay option_82 check [enable | disable]
Description
This command is used to configure the checking mechanism of DHCP/BOOTP relay agent
information option 82 of the Switch.
Parameters enable – When the field is toggled to enable, the relay agent will check the validity of the
packet’s option 82 field. If the Switch receives a packet that contains the option 82 field from
a DHCP client, the Switch drops the packet because it is invalid. In packets received from
DHCP servers, the relay agent will drop invalid messages.
disable − When the field is toggled to disable, the relay agent will not check the validity of the
packet’s option 82 field. The default setting is disable.
Restrictions
Only Administrator and Operator and Power-User-level users can issue this command.
Example usage:
To configure DHCP relay option 82 check:

D-Link xStack DES-3528 Series Specifications

General

Brand	D-Link
Model	xStack DES-3528 Series
Category	Switch
Language	English