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Cisco IOS DHCP Server 1Cisco IOS DHCP ServerFeature OverviewDynamic Host Control Protocol (DHCP) enables you to automatically assign reusable IP addr

Configuration Examples10Release 12.0(1)TTo display DHCP server information, use the following commands in EXEC mode, as needed:Configuration ExamplesTh

Manual Bindings Configuration Example Cisco IOS DHCP Server 11ip dhcp database ftp://user:[email protected]/router-dhcp write-delay 120ip dhcp exc

Command Reference12Release 12.0(1)TCommand ReferenceThis section documents new or modified commands. All other commands used with this feature aredocum

Manual Bindings Configuration Example Cisco IOS DHCP Server 13In Cisco IOS Release 12.0(1)T or later, you can search and filter the output for show and

Command Reference14Release 12.0(1)TbootfileTo specify the name of the default boot image for a Dynamic Host Configuration Protocol (DHCP)client, use th

clear ip dhcp binding Cisco IOS DHCP Server 15clear ip dhcp bindingTo delete an automatic address binding from the Cisco IOS Dynamic Host Configuratio

Command Reference16Release 12.0(1)Tclear ip dhcp conflictTo clear an address conflict from the Cisco IOS Dynamic Host Configuration Protocol (DHCP)Serve

clear ip dhcp server statistics Cisco IOS DHCP Server 17clear ip dhcp server statisticsTo reset all Cisco IOS Dynamic Host Configuration Protocol (DHC

Command Reference18Release 12.0(1)Tclient-identifierTo specify a Microsoft Dynamic Host Configuration Protocol (DHCP) client’s unique identifier(in dott

client-name Cisco IOS DHCP Server 19client-nameTo specify the name of a Dynamic Host Configuration Protocol (DHCP) client, use theclient-name DHCP poo

Benefits2Release 12.0(1)TNote The formal request for the offered IP address (the DHCPREQUEST message) that is sent bythe client is broadcast so that a

Command Reference20Release 12.0(1)Tdefault-routerTo specify the default router list for a Dynamic Host Configuration Protocol (DHCP) client, usethe de

dns-server Cisco IOS DHCP Server 21dns-serverTo specify the Domain Name System (DNS) IP servers available to a Dynamic Host ConfigurationProtocol (DHC

Command Reference22Release 12.0(1)Tdomain-nameTo specify the domain name for a Dynamic Host Configuration Protocol (DHCP) client, use thedomain-name D

hardware-address Cisco IOS DHCP Server 23hardware-addressTo specify the hardware address of a Dynamic Host Configuration Protocol (DHCP) client, useth

Command Reference24Release 12.0(1)ThostTo specify the IP address and network mask for a manual binding to a Dynamic Host ConfigurationProtocol (DHCP)

ip dhcp conflict logging Cisco IOS DHCP Server 25ip dhcp conflict loggingTo enable conflict logging on a Cisco IOS Dynamic Host Configuration Protocol (

Command Reference26Release 12.0(1)Tip dhcp databaseYou can configure a Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server to saveautomatic bin

ip dhcp database Cisco IOS DHCP Server 27Related Commandsshow ip dhcp database

Command Reference28Release 12.0(1)Tip dhcp excluded-addressTo specify IP addresses that a Cisco IOS Dynamic Host Configuration Protocol (DHCP) Servers

ip dhcp ping packets Cisco IOS DHCP Server 29ip dhcp ping packetsTo specify the number of packets a Cisco IOS Dynamic Host Configuration Protocol (DHC

Cisco IOS DHCP Server 3• Cisco MC3810 series• Cisco 4000 series• Cisco AS5100 access server• Cisco AS5200 universal access server• Cisco AS5300 unive

Command Reference30Release 12.0(1)Tip dhcp ping timeoutTo specify how long a Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server waits fora pi

ip dhcp pool Cisco IOS DHCP Server 31ip dhcp poolTo configure a Dynamic Host Configuration Protocol (DHCP) address pool on a Cisco IOS DHCPServer and e

Command Reference32Release 12.0(1)Tip dhcp relay information checkTo configure a Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server to validat

ip dhcp relay information option Cisco IOS DHCP Server 33ip dhcp relay information optionTo configure a Cisco IOS Dynamic Host Configuration Protocol (

Command Reference34Release 12.0(1)Tip dhcp relay information policyTo configure a Dynamic Host Configuration Protocol (DHCP) relay agent’s informationr

lease Cisco IOS DHCP Server 35leaseTo configure the duration of the lease for an IP address that is assigned from a Cisco IOS DynamicHost Configuration

Command Reference36Release 12.0(1)Tnetbios-name-serverTo configure NetBIOS Windows Internet Naming Service (WINS) name servers that are availableto Mic

netbios-node-type Cisco IOS DHCP Server 37netbios-node-typeTo configure the NetBIOS node type for Microsoft Dynamic Host Configuration Protocol (DHCP)c

Command Reference38Release 12.0(1)Tnetwork (DHCP)To configure the subnet number and mask for a Dynamic Host Configuration Protocol (DHCP)address pool o

next-server Cisco IOS DHCP Server 39next-serverTo configure the next server in a Dynamic Host Configuration Protocol (DHCP) client’s bootprocess, use t

Prerequisites4Release 12.0(1)TPrerequisitesBefore you configure the Cisco IOS DHCP Server feature, complete the following tasks:• Identify an external

Command Reference40Release 12.0(1)ToptionTo configure Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server options, use theoption DHCP pool confi

option Cisco IOS DHCP Server 41Related Commandsip dhcp pool

Command Reference42Release 12.0(1)Tservice dhcpTo enable the Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server feature on yourrouter, use th

show ip dhcp binding Cisco IOS DHCP Server 43show ip dhcp bindingTo display address bindings on the Cisco IOS Dynamic Host Configuration Protocol (DHC

Command Reference44Release 12.0(1)TRelated Commandsclear ip dhcp binding

show ip dhcp conflict Cisco IOS DHCP Server 45show ip dhcp conflictTo display address conflicts found by a Cisco IOS Dynamic Host Configuration Protocol

Command Reference46Release 12.0(1)Tshow ip dhcp databaseTo display Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server database agentinformati

show ip dhcp database Cisco IOS DHCP Server 47Related Commandsip dhcp databaseRead The last time bindings were read from the file server.Written The la

Command Reference48Release 12.0(1)Tshow ip dhcp server statisticsTo display Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server statistics, us

show ip dhcp server statistics Cisco IOS DHCP Server 49Related Commandsclear ip dhcp server statisticsTable 5 show ip dhcp server statistics Field Des

Configuring a DHCP Database Agent or Disabling DHCP Conflict Logging Cisco IOS DHCP Server 5Configuring a DHCP Database Agent or Disabling DHCP Conflict

Debug Commands50Release 12.0(1)TDebug CommandsThis section describes the following new debug command:• debug ip dhcp server

debug ip dhcp server Cisco IOS DHCP Server 51debug ip dhcp serverTo enable Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server debugging, use

Glossary52Release 12.0(1)TGlossaryaddress binding—A mapping between the client’s IP and hardware (MAC) addresses. The client’sIP address may be configu

DHCP Configuration Task List6Release 12.0(1)TConfiguring the DHCP Address Pool Subnet and MaskTo configure a subnet and mask for the newly created DHCP

Configuring the NetBIOS Node Type for the Client Cisco IOS DHCP Server 7Configuring the NetBIOS Node Type for the ClientThe NetBIOS node type for Micro

DHCP Configuration Task List8Release 12.0(1)TTo configure manual bindings, use the following commands beginning in global configuration mode:Configuring

Configuring the Timeout Value for Ping Packets Cisco IOS DHCP Server 9Configuring the Timeout Value for Ping PacketsBy default, the DHCP server waits 5