3com 3031 Instruccion De Instalación

C

HAPTER

 30: DHCP C

ONFIGURATION

DHCP client sends the DHCPREQUEST packet to DHCP server to originate binding 
refreshing within the period between T2 and T1 (T2 is the period before refreshing 
binding with timer, 7/8 of the lease limit by default). If DHCP approves that 
request, it returns the DHCPACK packet. Then DHCP client starts the new address 
lease upon receiving that packet. 

The following figure illustrates the aforementioned processes. 

Figure 104   DHCP client status transition

DHCP client configuration task includes one and only item of commands.

Configuring interface to get IP address from DHCP

Perform the following in the Ethernet Interface View (including sub-interfaces)

DHCPOFFER/

Discard

DHCPNAK/

Discard offer

Select offer/

send DHCPREQUEST

DHCPNAK,

Lease expired/

Halt network

DHCPNAK

Halt networ

 T2 expires/

Broadcast

DHCPREQUEST

T1 expires/

Send DHCPREQUEST

to leasing server

DHCPACK/

Record lease, set

timers T1, T2

 DHCPACK/

Record lease, set

timers T1,T2

DHCPACK/

Record lease, set

timers T1, T2

 DHCPACK

(not accept.)/

Send DECLINE

-/Send DHCPDISCOVER

DHCPOFFER

/Collect

replies

DHCPOFFER,

DHCPACK,
DHCPNAK/

Discard

Table 444   Configuring static IP and MAC address binding

Configures the interface to get IP address from 
DHCP

Cancel the interface getting IP address from 
DHCP