ip directed-broadcast Configuring Broadcast Settings
Enterasys Matrix DFE-Gold Series Configuration Guide 16-19

Configuring Broadcast Settings

Applying DHCP/BOOTP Relay

DHCP/BOOTPrelayfunctionalityisappliedwiththehelpofIPbroadcastforwarding.Atypical
situationoccurswhenahostrequestsanIPaddresswithnoDHCPserverlocatedonthatsegment.
AroutingmodulecanforwardtheDHCPrequesttoaserverlocatedonanothernetworkif:
•IPforwardprotocolisenabledforUDPasdescribedinipforwardprotocolonpage 1620,
and
•TheaddressoftheDHCPserverisconfiguredasahelperaddressonthereceivinginterfaceof
theroutingmoduleforwardingtherequest,asdescribediniphelperaddressonpage 1621.
TheDHCP/BOOTPrelayfunctionwilldetecttheDHCPrequestandmakethenecessarychanges
totheheader,replacingthedestinationaddresswiththeaddressoftheserver,andthesourcewith
itsownaddress,andsendittotheserver.Whentheresponsecomesfromtheserver,theDHCP/
BOOTPrelayfunctionsendsittothehost.
Purpose
ToconfigureIPbroadcastsettings.
Commands

ip directed-broadcast

UsethiscommandtoenableordisableIPdirectedbroadcastsonaninterface.
Syntax
ip directed-broadcast
no ip directed-broadcast
Parameters
None.
Defaults
None.
Mode
Routercommand,Interfaceconfiguration:Matrix>Router(configif(Vlan1))#
For information about... Refer to page...
ip directed-broadcast 16-19
ip forward-protocol 16-20
ip helper-address 16-21