Siemens S223 - Simplified DHCP Option 82

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.
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