Administrator Guide

DHCPINFORM A client uses this message to request conguration parameters when it assigned an IP address manually

rather than with DHCP. The server responds by unicast.

DHCPNAK A server sends this message to the client if it is not able to fulll a DHCPREQUEST; for example, if the

requested address is already in use. In this case, the client starts the conguration process over by sending a

DHCPDISCOVER.

DHCPRELEASE A DHCP client sends this message when it is stopped forcefully to return its IP address to the server.

Figure 5. Assigning Network Parameters using DHCP

Dell Networking OS Behavior: DHCP is implemented in Dell Networking OS based on RFC 2131 and 3046.

Debugging DHCP Client Operation

To enable debug messages for DHCP client operation, enter the following debug commands:

• Enable the display of log messages for all DHCP packets sent and received on DHCP client interfaces.

EXEC Privilege

[no] debug ip dhcp client packets [interface type slot/port]

• Enable the display of log messages for the following events on DHCP client interfaces: IP address acquisition, IP address release,

Renewal of IP address and lease time, and Release of an IP address.

Dynamic Host Conguration Protocol (DHCP)