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DHCP Commands

XSR CLI Reference Guide 15-101

next-server

Thiscommandspecifiestheserverfromwhichtheinitialbootfilewillbeloaded.Theservercan

bedesignatedeitherbyIPaddressorhostname.

Syntax

next-server server [hostname | ip_address]

Syntax of the “no” Form

Usethenoformofthiscommandtoremovethenext‐server:

no next-server server [hostname | ip_address]

Mode

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

DHCPpoolconfiguration:

XSR(config-dhcp-pool)#

DHCPhostconfiguration:XSR(config-dhcp-host)#

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

Example

Thefollowingexamplespecifies theIPaddressofanext‐server:

XSR(config-dhcp-pool)next-server 192.168.57.4

option

ThiscommandconfiguresDHCPserveroptions/extensions.DHCPServerprovidesaframework

forpassingconfigurationdatatohostsonaTCP/IPnetwork.Configurationvaluesandother

controldataarecarriedintaggeddataitemsstoredintheoptionsfieldoftheDHCPmessage.

Thedataitemsarealsocalledoptionsorclient

extensions.ThecurrentsetofXSR‐supported

DHCPoptionsandBOOTPvendorextensionsaredescribedinTable 15‐1onpage 102and

generallyinRFC‐2132.DefaultvaluesaredefinedinRFC‐1122.

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hostasinnermost,thenclient‐classandpoolasthemostgeneral.

Syntax

option code {ascii string | hex string | ip address}

hostname Designation of the server by name.

ip_address Designation of the server by IP address.

code DHCP option code.

ascii string An ASCII character string. Strings containing space must be enclosed with quotes.

The following options are set with an ASCII string: 12, 14, 15, 17, 18, 40, 47, and 64.

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