Filter
Top Products
Configure DHCP Relay 347
II. Networking Diagram
Figure 128 Networking diagram of an DHCP relay configuration example
III. Configuration Procedure
1 Configure DHCP relay router:
[Router-Ethernet0] ip address 10.110.1.1 255.255.0.0
[Router-Ethernet0] ip relay-address 202.38.160.2
To configure helper address 202.38.160.2 on the Ethernet interface 0 you need to
specify the address for the DHCP server. When requesting for configuration
information, the DHCP client host sends out a DHCP broadcast message. After
receiving the broadcast message, the Ethernet interface of the DHCP relay router
processes and sends it to the helper address of the interface, i.e. the DHCP server.
The DHCP server returns the generated reply message to the DHCP relay router,
then the router notifies the DHCP client host of the reply message.
Configuration example of transparent transmission forwarding protocol
I. Configuration Requirements
The host and TFTP server should not be in the same network segment. As the host
does not know the IP address of TFTP server, it sends a request message with the
broadcast address as the destination address so as to transmit it transparently to
the TFTP server via router A.
DHCP client host
202.38.160.1
DHCPserver
202.38.160.2
Intermediate
network
10.110.1.1
DHCP trunk router