Debug Dhcp Server; Dhcp Clear Commands; Configure The System To Be A Relay Agent - Dell Force10 MXL Blade Configuration Manual

Debug DHCP Server

To display debug information, follow this step:
Task
Display debug information for DHCP
server.

DHCP Clear Commands

To clear DHCP binding entries, follow these steps:
Task
Clear DHCP binding entries for the entire binding
table.
Clear a DHCP binding entry for an individual IP
address.
Clear a DHCP address conflict.
Clear DHCP server counters.

Configure the System to be a Relay Agent

DHCP clients and servers request and offer configuration information using 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 configure an interface on the Dell Force10 system to relay the DHCP messages to a specific
DHCP server using the
Specify multiple DHCP servers by entering the
When you configure the
port 67. The system rewrites packets received from the client and forwards it using 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 using broadcast.
Note: DHCP relay is not available on Layer 2 interfaces and VLANs.
Command Syntax
debug ip dhcp server [events | packets]
Command Syntax
clear ip dhcp binding
clear ip dhcp binding ip address
clear ip dhcp conflict
clear ip dhcp server statistics
ip helper-address dhcp-address
command, the system listens for DHCP broadcast messages on
ip helper-address
Command Mode
EXEC Privilege
command from INTERFACE mode
ip helper-address dhcp-address
Dynamic Host Configuration Protocol (DHCP) | 167
Command Mode
EXEC Privilege
EXEC Privilege
EXEC Privilege
EXEC Privilege
(Figure 9-4).
command multiple times.