ip dhcp client

To enable DHCP fast access Mode and configure the ARP, discovery and idle DHCP timers, use the command ip dhcp client in Privileged EXEC Mode. The no form of the command resets all DHCP Client timers to their defaults and disables DHCP Client fast access mode.

ip dhcp client

ip dhcp client

{ {arp-check timer } { <integer (1-20)> }

{ | discovery timer } { <integer (1-300)> }

{ | fast-access }

{ | idle timer } { <integer (1-300)>} }

no ip dhcp client

no ip dhcp client

{ {arp-check timer } { | discovery timer } { | fast-access } { | idle timer} }

Parameters

Parameter	Type	Description
`arp-check time`		Enter to configure DHCP client retransmission timeout between ARP messages. For devices to be able to communicate with each other when they are not part of the same network, the 48-bit MAC address must be mapped to an IP address. One of the Layer 3 protocols used to perform the mapping is Address Resolution Protocol (ARP).
`<integer (1-20)>`	Integer	Enter a value for the DHCP client retransmission timeout between ARP messages. This value ranges from 1 to 20.
`discovery timer`		Enter to configure DHCP Client Discovery timer, which denotes the time to wait between discovery messages sent by the DHCP client. Note: This command executes only ifip dhcp client fast-access is enabled
`<integer (1-300)>`	Integer	Enter a value for the time to wait between discovery messages sent by the DHCP client. This value ranges from 1 to 300
`fast-access`		Enter to enable DHCP fast access mode. If fast access mode is enabled, time to wait between discovery messages i.e. discovery timeout and time to wait after four unsuccessful discovery will be user configurable and the default value for discovery timeout is 5 seconds and for the null state timeout is 1 second.
`idle timer`		Enter to configure DHCP Client Discovery timer, DHCP Client idle timer which specifies the time to wait after four unsuccessful DHCP client discovery messages. Note: This command executes only ifip dhcp client fast-access is enabled.
`<integer (1-300)>`	Integer	Enter a value for the time to wait after four unsuccessful DHCP client discovery messages. This value ranges from 1 to 300.

Mode

Privileged EXEC Mode

Default

If dhcp fast mode is enabled, the default DHCP Client arp-check timer is 1, DHCP Client Discovery timer is 5, and the default DHCP Client Idle timer is 1.
If dhcp fast mode is disabled, the default DHCP Client arp-check timer is 3, the default DHCP Client Discovery timer is 15, and the default DHCP Client Idle timer is 18.

Examples

iS5Comm# ip dhcp client arp-check timer 8

iS5Comm# ip dhcp client fast-access

iS5Comm# ip dhcp client discovery timer 8

iS5Comm# ip dhcp client idle timer 8