Edge-Core ES3528MV2 User Manual

C HAPTER 44 | DHCP Commands
DHCP Relay Option 82
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DHCP RELAY OPTION 82
This section describes commands used to configure the switch to relay
DHCP requests from local hosts to a remote DHCP server.
ip dhcp relay server 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 ip
dhcp relay information 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.
◆ You must specify the IP address for at least one active DHCP server.
Otherwise, the switch’s DHCP relay agent will not be able to forward
Table 192: DHCP Relay Option 82 Commands
Command Function Mode
ip dhcp relay server Specifies DHCP server or relay server addresses GC
ip dhcp relay information
option
Enables DHCP Option 82 information relay, and
specifies the frame format for the remote-id
GC
ip dhcp relay information
policy
Specifies how to handle DHCP client requests which
already contain Option 82 information
GC
show ip dhcp relay Displays the configuration settings for DHCP relay
service
PE

Edge-Core ES3528MV2 Specifications

General

Brand	Edge-Core
Model	ES3528MV2
Category	Network Router
Language	English