SMC Networks TigerAccess SMC7816M - Manual (Page 922)

DHCP C
OMMANDS
37-4
Example
ip dhcp information option
This command enables DHCP Option 82 information relay, and specifies
the frame format to use when Option 82 information is generated by the
switch. Use the no form of this command to disable this feature.
Syntax
ip dhcp information option {circuit-id | remote-id}
no ip dhcp information option
• circuit-id - Includes fields which identify the incoming circuit,
including the VLAN, stack unit, and port.
• remote-id - Includes a MAC address field for the relay agent (that
is, the MAC address of the switch’s CPU).
Default Setting
Disabled
Command Mode
Global Configuration
Usage Guidelines
• DHCP provides a relay agent information option for sending
information about its DHCP clients to the DHCP server. Also
known as DHCP Option 82, it allows compatible DHCP servers to
use this information when assigning IP addresses, or to set other
services or policies for clients.
• When Option 82 is enabled, the requesting client (or an intermediate
relay agent that has used the information fields to describe itself) can
be identified in the DHCP request packets forwarded by the switch
and in reply packets sent back from the DHCP server. Depending
on the selected option frame format, this information may specify
the circuit which received the request (including VLAN, stack unit,
and port), or just the MAC address of the requesting device.
Console(config)#ip dhcp relay server 192.168.10.19
Console(config)#