Chapter 29
| DHCP Commands
DHCP Relay Option 82
– 845 –
â–
A DHCP relay server has been set on the switch, when the switch receives a
DHCP request packet with a non-zero relay agent address field (that is not
the address of this switch).
â–
A DHCP relay server has been set on the switch, when the switch receives a
DHCP reply packet without option 82 information from the management
VLAN.
â–
The reply packet contains a valid relay agent address field (that is not the
address of this switch), or receives a reply packet with a zero relay agent
address through the management VLAN.
â–
A DHCP relay server has been set on the switch, and the switch receives a
reply packet on a non-management VLAN.
â—† Use the ip dhcp relay information policy command to specify how to handle
DHCP client request packets which already contain Option 82 information.
â—† DHCP Snooping Information Option 82 (see page 307) and DHCP Relay
Information Option 82 cannot both be enabled at the same time.
Example
This example enables Option 82.
Console(config)#ip dhcp relay information option
Console(config)#
Related Commands
ip dhcp relay information policy (846)
ip dhcp relay server (842)
ip dhcp snooping (305)
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