Siemens S223, S323 user manual Simplified Dhcp Option, Trusted Remote ID, Trusted Physical Port

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

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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
	Option 82	Specifies a trusted remote ID.
trust remote-id ip A.B.C.D
trust remote-id text STRING

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

Command	Mode	Description
no trust remote-id hex HEXSTRING
	Option 82	Deletes a specified trusted remote ID.
no trust remote-id ip A.B.C.D
no trust remote-id text STRING

Trusted Physical Port

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

Command	Mode	Description
		Specifies a trusted physical port.
trust port PORTS {normal		normal: DHCP packet
option82 all}	Option 82	option82: DHCP option 82 packet
		all: DHCP + option 82 packet
no trust port {all PORTS} {nor-		Deletes a specified trusted port.
mal option82 all}

8.8.5.5Simplified 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	Interface	Enables the simplified DHCP option 82.
no ip dhcp simplified-option82		Disables the simplified DHCP option 82.

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