beautypg.com

5 simplified dhcp option 82 – Siemens S223 User Manual

Page 255

background image

User Manual UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5

A50010-Y3-C150-2-7619 255

If you specify the default trust policy as deny, the DHCP packet that carries the informa-
tion you specifies below will be permitted, and vice versa.

Trusted Remote ID

To specify a trusted remote ID, use the following command.

Command Mode

Description

trust remote-id hex

HEXSTRING

trust remote-id ip

A.B.C.D

trust remote-id text

STRING

Option 82

Specifies a trusted remote ID.

To delete a specified trusted remote ID, use the following command.

Command Mode

Description

no trust remote-id hex

HEXSTRING

no trust remote-id ip

A.B.C.D

no trust remote-id text

STRING

Option 82

Deletes a specified trusted remote ID.

Trusted Physical Port

To specify a trusted physical port, use the following command.

Command Mode

Description

trust port

PORTS {normal |

option82

| all}

Specifies a trusted physical port.
normal: DHCP packet
option82: DHCP option 82 packet
all: DHCP + option 82 packet

no trust port

{all | PORTS} {nor-

mal

| option82 | all}

Option 82

Deletes a specified trusted port.

8.8.5.5

Simplified DHCP Option 82

In case of a DHCP option 82 environment, when forwarding DHCP messages to a DHCP
server, a DHCP relay agent normally adds a relay agent information option to the DHCP
messages and replaces a gateway address in the DHCP messages with a relay agent
address.

On the other hand, in case of a simplified DHCP option 82 environment, a DHCP relay
agent adds a relay agent information option to the DHCP messages without replacement
of a gateway address field in the DHCP messages. This allows an enhanced security and
efficient IP assignment in the Layer 2 environment with a relay agent information option.

To enable/disable the simplified DHCP option 82, use the following command.

Command Mode

Description

ip dhcp simplified-opt82

Enables the simplified DHCP option 82.

no ip dhcp simplified-option82

Interface

Disables the simplified DHCP option 82.

i

This manual is related to the following products: