Enterasys Matrix DFE-Gold Series

ip directed-broadcast Configuring Broadcast Settings
Enterasys Matrix DFE-Gold Series Configuration Guide 16-19
Configuring Broadcast Settings
Applying DHCP/BOOTP Relay
DHCP/BOOTPrelayfunctionalityisappliedwiththehelpofIPbroadcastforwarding.Atypical
situationoccurswhenahostrequestsanIPaddresswithnoDHCPserverlocatedonthatseg m ent.
AroutingmodulecanforwardtheDHCPrequesttoaserverlocatedonanothernetworkif:
•IPforward‐protocolis
enabledforUDPasdescribedin“ipforward‐protocol”onpage 16‐20,
and
•TheaddressoftheDHCPserverisconfiguredasahelperaddressonthereceivinginterfaceof
theroutingmoduleforwardingtherequest,asdescribedin“iphelper‐address”onpage 16‐21.
TheDHCP/BOOTPrelayfunction
willdetecttheDHCPrequestandmakethenecessarychanges
totheheader,replacingthedestinationaddresswiththeaddressoftheserver,andthesourcewith
itsownaddress,andsendittotheserver.Whentheresponsecomesfromtheserver,theDHCP/
BOOTPrelayfunctionsendsitto
thehost.
Purpose
ToconfigureIPbroadcastsettings.
Commands
ip directed-broadcast
UsethiscommandtoenableordisableIPdirectedbroadcastsonaninterface.
Syntax
ip directed-broadcast
no ip directed-broadcast
Parameters
None.
Defaults
None.
Mode
Routercommand,Interfaceconfiguration:Matrix>Router(config‐if(Vlan1))#
For information about... Refer to page...
ip directed-broadcast 16-19
ip forward-protocol 16-20
ip helper-address 16-21