Specifications

SecureStack C3 Configuration Guide 13-1
13
Configuring DHCP Server
ThischapterdescribesthecommandstoconfiguretheIPv4DHCPserverfunctionalityona
SecureStackC3switch.
DHCP Overview
DynamicHostConfigurationProtocol(DHCP)forIPv4isanetworklayerprotocolthat
implementsautomaticormanualassignmentofIPaddressesandotherconfigurationinformation
toclientdevicesbyservers.ADHCPservermanagesauser‐configuredpoolofIPaddressesfrom
whichitcanmakeassignmentsuponclientrequests.A
relayagentpassesDHCPmessages
betweenclientsandserverswhichareondifferentphysicalsubnets.
DHCP Relay Agent
TheDHCP/BOOTPrelayagentfunctioncanbeconfiguredonalloftheSecureStackC3’srouting
interfaces.TherelayagentcanforwardaDHCPclient’srequesttoaDHCPserverlocatedona
differentnetworkiftheaddressoftheserverisconfiguredasahelperaddressonthereceiving
interface.The
relayagentinterfacemustbeaVLANwhichisconfiguredwithanIPaddress.Refer
to“AboutDHCP/BOOTPRelay”onpage 15‐18andthe iphelper‐addresscommand(“iphelper‐
address”onpage 15‐18)formoreinformation.
DHCP Server
DHCPserverfunctionalityallowstheSecureStackC3switchtoprovidebasicIPconfiguration
informationtoaclientonthenetworkwhorequestssuchinformationusingtheDHCPprotocol.
DHCPprovidesthefollowingmechanismsforIPaddressallocationbyaDHCPserver:
• Automatic—DHCPserverassignsanIPaddresstoaclientfor
alimitedperiodoftime(or
untiltheclientexplicitlyrelinquishestheaddress)fromadefinedpoolofIPaddresses
configuredontheserver.
•Manual—Aclient’sIPaddressisassignedbythenetworkadministrator,andDHCPisused
simplytoconveytheassignedaddresstotheclient.Thisismanagedby
meansof“static”
addresspoolsconfiguredontheserver.
For information about... Refer to page...
DHCP Overview 13-1
Configuring General DHCP Server Parameters 13-3
Configuring IP Address Pools 13-11