Table 135: Dhcp Relay Option 82 Commands - Edge-Core ECS4210-12P Reference Manual

DHCP Relay Option 82
ip dhcp relay server
This section describes commands used to configure the switch to relay DHCP
requests from local hosts to a remote DHCP server.

Table 135: DHCP Relay Option 82 Commands

Command
ip dhcp relay server
ip dhcp relay information
option
ip dhcp relay information
policy
show ip dhcp relay
This command specifies the DHCP server or relay server addresses to use. Use the
no form to clear all addresses.
Syntax
ip dhcp relay server address1 [address2 [address3 ...]]
no ip dhcp relay server
address - IP address of DHCP server. (Range: 1-5 addresses)
Default Setting
None
Command Mode
Global Configuration
Usage Guidelines
◆
DHCP relay service applies to DHCP client requests received on any configured
VLAN, both the management VLAN and non-management VLANs.
◆
This command is used to configure DHCP relay for host devices attached to the
switch. If DHCP relay service is enabled (using the
option command), and this switch sees a DHCP client request, it inserts its own
IP address into the request so that the DHCP server will know the subnet where
the client is located. Then, the switch forwards the packet to a DHCP server on
another network. When the server receives the DHCP request, it allocates a free
IP address for the DHCP client from its defined scope for the DHCP client's
subnet, and sends a DHCP response back to the DHCP relay agent (i.e., this
switch). This switch then passes the DHCP response received from the server to
the client.
Function
Specifies DHCP server or relay server addresses
Enables DHCP Option 82 information relay, and specifies
the frame format for the remote-id
Specifies how to handle DHCP client requests which
already contain Option 82 information
Displays the configuration settings for DHCP relay service
– 639 –
Chapter 25
| DHCP Commands
DHCP Relay Option 82
Mode
GC
GC
GC
PE
ip dhcp relay information