Zte ZXR10 8900 Series - Ip Dhcp Proxy Client Leasetime

Chapter3DHCPandDHCPSNOOPINGConguration
assignIPaddressforDHCPClientdynamically.DHCPServersup-
portstoassignIPaddressfordirectconnectedDHCPusers,also
supportstoassignIPaddressthroughDHCPusersbyDHCPRelay
forwarding.
AssignIPaddressfordirectlyconnecteduser ,DHCPServerwill
assignaddressbyattachedIPPoolonaccessDHCPuserinterface
(usepeerdefaultippoolcommandtoattach).DHCPSERVERwill
choosecorrespondingaddresspooltoassignonglobalcongured
alladdresspool.
Afterstartthebuilt-inDHCPProxyprocess,systemwillresolve
DHCPClient’sIPaddressrequestoncongureduserinterfaces,dy-
namicallyassignIPaddressforDHCPClientthroughexternalDHCP
Serverconguredoninterfaces.Whentheclientsendsreletting
requestandifthelongleasetimethattheDHCPServerassigns
toDHCPProxyisnotovertime,DHCPProxywillresponsetothe
client.Thatis,DHCPProxydoesnotneedtosendrelettingrequest
toDHCPServer .ThisdecreasestheburdenofDHCPServer .
ThissystemcontainsDHCPServer ,DHCPRelayandDHCPProxy
functionsinside,buttheycan’toperatetogether .Thus,iftheDHCP
Serverfunctionhasbeenstarted,itmuststopthestartedDHCP
ServerfunctionbeforestartingDHCPRelayfunction.
Example
ThisexampledescribeshowtostartDHCPRelayfunctiononan
interface.
ZXR10(config)#interfacefei_1/1
ZXR10(config-if)#ipdhcpmoderelay
ZXR10(config-if)#
Related
Commands
showipdhcpconfigure
ipdhcpproxyclient
leasetime
Purpose
UsethiscommandtoconguretheleasttimethattheDHCPProxy
assignstoDHCPClient.
CommandModes
Globalconguration
Syntax
ipdhcpproxyclientleasetime<short_leasetime>
Syntax
Description
<short_leasetime>
Shortleasetime,initsunitofsecond,ranging
from30to3600.
Defaults
Itis60secondsbydefault.
Example
Thisexampleshowshowtoconguretheshortleasetimeto120
seconds.
ZXR10(config)#ipdhcpproxyclientleasetime120
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