Administrator Guide
• Clear a DHCP address conict.
EXEC Privilege mode
clear ip dhcp conflict
• Clear DHCP server counters.
EXEC Privilege mode
clear ip dhcp server statistics
Congure the System to be a Relay Agent
DHCP clients and servers request and oer conguration information via broadcast DHCP messages. Routers do not forward broadcasts,
so if there are no DHCP servers on the subnet, the client does not receive a response to its request and therefore cannot access the
network.
You can congure an interface on the Dell Networking system to relay the DHCP messages to a specic DHCP server using the ip
helper-address dhcp-address command from INTERFACE mode, as shown in the following illustration. Specify multiple DHCP
servers by using the ip helper-address dhcp-address command multiple times.
When you congure ip helper-address, the system listens for DHCP broadcast messages on port 67. The system rewrites packets
received from the client and forwards it via unicast; the system rewrites the destination IP address and writes its own address as the relay
device. Responses from the server are unicast back to the relay agent on port 68 and the relay agent rewrites the destination address and
forwards the packet to the client subnet via broadcast.
NOTE
: DHCP Relay is not available on Layer 2 interfaces and VLANs.
Dynamic Host Conguration Protocol (DHCP) 291