Matrix DFE Series and N-SA User’s Guide 8-1
8
Configuring OSPF
ThischapterprovidesinformationaboutthefollowingOpenShortestPathFirst(OSPF)protocol
configurationproceduresontheMatrixDFESeriesorN‐SAdevice.
Using OSPF on a Matrix DFE or N-SA Series Device
Asdiscussedin“UsingtheMatrixDFESeriesorN‐SADeviceasaRouter”onpage 7‐1,operating
thedeviceinroutingmode—ascomparedtoswitchmodeonly—allows usersfromoneVLAN
tocommunicatewithanotherVLANconnectedtothesamedevice.Whenitbecomes
necessaryfor
usersfromonenetworktocommunicatewithusersconnectedtoanotherrouteronanother
network,aroutingprotocolsuchasOSPFmustbeconfiguredontheroutinginterfaces.The
proceduresandsampleconfigurationsinthischapterdescribehowtoconfigureOSPFonMatrix
DFESeriesofN‐SA
devicestoservethatpurpose.
OSPF Overview
MatrixDFESeriesandN‐SAdevicessupportOpenShortestPathFirst(OSPF)Version2.0,as
definedinRFC2328.OSPFisaninteriorgatewaylinkstateprotocolthatdistributesrouting
informationbetweenroutersinasingleautonomoussystem(AS).OSPFchoosestheleast‐cost
pathasthebestpath.It
isasuitableroutingprotocolforcomplexnetworkswithalargenumberof
routersbecauseitprovidesequal‐costmulti‐pathrouting,sendingpacketstoasingledestination
bywayofmorethanoneinterfacesimultaneously.
AsanInteriorGatewayProtocol(IGP),OSPFmaintainsadatabaseofroutinginformationitlearns
fromothersystemsrunningthesameprotocolwithinthenetworkorautonomoussystem(AS).
SinceOSPFisalink‐stateroutingprotocol,systemsrunningOSPFfloodthenetworkwhena
changeisdetected,andmaintainalinkstatedatabase(LSDB).Whenthereisachange,suchasa
For information about... Refer to page...
Using OSPF on a Matrix DFE or N-SA Series Device 8-1
OSPF Overview 8-1
Configuring OSPF 8-7
Monitoring and Maintaining OSPF 8-12
* Advanced License Required *
OSPF is an advanced routing feature that must be enabled with a license key. If you have purchased an
advanced routing license and have enabled routing on the device, you must activate your license as
described in “Activating Advanced Routing” on page 8-9 in order to enable the OSPF command set. If you
wish to purchase an advanced routing license, contact Enterasys Networks Sales.
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