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DHCP Commands

15-98 Configuring DHCP

lease

ThiscommandconfiguresthedurationoftheleaseforanIPaddressthataDHCPserverassignsto

aDHCPclient.Theleasetimesetisthesystemdefaultvaluewhichoverridesthenon‐specified

defaultvalue(oneday).

Iftheclientrequestsaleaseperiodexceedingtheperiod configuredon

theserver,thelease

intervalofferedbytheserverwillequalthatofthevalueconfiguredbythiscommand.Iftheclient

doesnotrequestaparticularleaseperiod‐typicalclientbehavior‐itisgrantedtheconfigured

defaultvalue.Manualbindingsarenotheldaccountabletothisleaseperiod.

Dependingon

theclientconfigurationinheritance,thecommandshouldbeusedfromtheproper

mode.Ifitisspecifiedfrommultiplemodes,anoverridemechanismchoosestheinnermostconfig

value,withclient‐classasinnermost,thenpoolasmostgeneral.

Syntax

lease {days [hours] [minutes] | infinite}

Syntax of the “no” Form

Usethenoformofthiscommandtorestorethedefaultvalue:

no lease

Default

Oneday

Mode

Eitherofthefollowingcommandmodesareavailable:

DHCPpoolconfiguration:

XSR(config-dhcp-pool)#

DHCPclientclassconfiguration:XSR(config-dhcp-class)#

Example

Thefollowingexampleconfiguresaone‐daylease:

XSR(config-dhcp-pool)#lease 1

Thefollowingexampleconfiguresaone‐hourlease:

XSR(config-dhcp-pool)#lease 0 1

Thefollowingexampleconfiguresaone‐minutelease:

XSR(config-dhcp-pool)#lease 0 0 1

days Duration of the lease in days.

hours Number of hours in the lease. A days value must be supplied before you can

configure an hours value.

minutes Number of minutes in the lease. Days and hours values must be set before you

can configure a minutes value.

infinite Duration of the lease is unlimited.

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