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Enterasys Networks XSR CLI Router User Manual

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DHCP Commands

15-110 Configuring DHCP

ThefollowingexampleconfiguresDHCPoption36,whichspecifiesEthernetencapsulation

Version2(RFC‐894)orIEEE802.3forDHCPclients.Version2encapsulationissetinthisexample:

XSR(config-dhcp-pool)#option 36 hex 00

ThefollowingexampleconfiguresDHCPoption21,whichsetsapolicyfilterfornon‐localsource

routing.ThefiltersconsistofalistofIPaddressesandmasksthatspecifydestination/maskpairs

withwhichtofilterinboundsourceroutes.Anysource‐routeddatagramwhosenext‐hopaddress

doesnotmatchone

ofthefiltersisdiscardedbytheclient.

XSR(config-dhcp-pool)#option 21 ip 90.1.1.78 255.255.0.0 134.141.90.1

255.255.255.0

ThefollowingexampleconfiguresDHCPoption22,whichspecifiesthemaximumsizedatagram

aclientwillreassemble.Thevalueis1052bytes:

XSR(config-dhcp-pool)#option 22 hex 41

ThefollowingexamplesetsDHCPoption28,specifyingthebroadcastaddressinuseonthe

clientʹssubnet.Thevalueis:255.255.2 55.255.

XSR(config-dhcp-pool)#option 28 ip 255.255.255.255

ThefollowingexampleconfiguresDHCPoption35,whichspecifiesthetimeoutinsecondsfor

ARPcacheentries.Thevalueis604,800(1week):

XSR(config-dhcp-pool)#option 35 hex 93A8

ThefollowingexamplesetsDHCPoption14,specifyingthepathnamewhereaDHCPclient’score

imagewillbeplacediftheclientcrashes:

XSR(config-dhcp-pool)#option 14 ascii c:/dump/path

ThefollowingexampleconfiguresDHCPoption31,whichspecifiesthattheDHCPclientshould

notperformsubnetmaskdiscovery:

XSR(config-dhcp-pool)#option 29 hex 00

ThefollowingexampleconfiguresDHCPoption19,whichspecifiesthattheDHCPclientshould

configureitsIPlayerforpacketforwarding:

XSR(config-dhcp-pool)#option 19 hex 01

ThefollowingexampleconfiguresDHCPoption31,whichspecifiesthattheDHCPclientshould

performRouterDiscovery:

XSR(config-dhcp-pool)#option 31 hex 01

ThefollowingexampleconfiguresDHCPoption47,whichspecifiesaNetBIOSoverTCP/IPscope

parameterforaDHCPclient:

XSR(config-dhcp-pool)#option 47 ascii scope

ThefollowingexampleconfiguresDHCPoption40,whichspecifiestheDHCPclient’sNIS

domain:

XSR(config-dhcp-pool)#option 40 ascii NISserver

ThefollowingexampleconfiguresDHCPoption18,whichspecifiesthepathnameofafile

retrievablethroughTFTP:

XSR(config-dhcp-pool)#option 18 ascii /extension/path

ThefollowingexampleconfiguresDHCPoption18,whichspecifiesalistofprioritizedstatic

routes(indescendingorder)theDHCPclientshouldinstallinitsroutingcache:

XSR(config-dhcp-pool)#option 33 ip 90.1.1.90 123.124.23.26 90.1.1.90 123.24.56.78

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