3 Controlling Routing Update Traffic.ppt

ControllingRoutingUpdateTraffic Usingthepassive interfaceCommand ControllingRoutingUpdateTraffic distribute list access list number name out interface name routing process routing processparameter Router config router Configuringdistribute list distribute list access list number name route mapmap tag in interface typeinterface number Router config router Useanaccesslist orroutemap topermitordenyroutes Canbeappliedtotransmitted received orredistributedroutingupdates Foroutboundupdates Forinboundupdates Hidesnetwork10 0 0 0usinginterfacefiltering FilteringRoutingUpdateswithaDistributeList ControllingRedistributionwithDistributeLists RouteMaps Routemapsaresimilartoascriptinglanguageforthesereasons Theyworklikeamoresophisticatedaccesslist Theyoffertop downprocessing Oncethereisamatch leavetheroutemap Linesaresequence numberedforeasierediting InsertionoflinesDeletionoflinesRoutemapsarenamedratherthannumberedforeasierdocumentation Matchcriteriaandsetcriteriacanbeused similartothe if then logicinascriptinglanguage RouteMapApplications Thecommonusesofroutemapsareasfollows Redistributionroutefiltering amoresophisticatedalternativetodistributelistsPolicy basedrouting theabilitytodetermineroutingpolicybasedoncriteriaotherthanthedestinationnetworkBGPpolicyimplementation theprimarytoolfordefiningBGProutingpolicies route mapmy bgppermit10 matchstatements matchstatements setstatements setstatements route mapmy bgpdeny20 route mapmy bgppermit30 RouteMapOperation Alistofstatementsconstitutesaroutemap Thelistisprocessedtop downlikeanaccesslist Thefirstmatchfoundforarouteisapplied Thesequencenumberisusedforinsertingordeletingspecificroutemapstatements Thematchstatementmaycontainmultiplereferences MultiplematchcriteriainthesamelineusealogicalOR Atleastonereferencemustpermittherouteforittobeacandidateforredistribution EachverticalmatchusesalogicalAND Allmatchstatementsmustpermittherouteforittoremainacandidateforredistribution Routemappermitordenydeterminesifthecandidatewillberedistributed RouteMapOperation Cont redistributeprotocol processid route mapmap tag router config router Allowsfordetailedcontrolofroutesbeingredistributedintoaroutingprotocol route mapCommands route mapmap tag permit deny sequence number router config Definestheroutemapconditions match conditions router config route map Definestheconditionstomatch set actions router config route map Definestheactiontobetakenonamatch ThematchCommand router config route map Match options options ipaddressip access listiproute sourceip access listipnext hopip access listinterfacetypenumbermetricmetric valueroute type external internal level 1 level 2 local Thematchcommandsspecifycriteriatobematched Theassociatedroutemapstatementpermitsordeniesthematchingroutes ThesetCommand router config route map set options options metricmetric valuemetric type type 1 type 2 internal external level level 1 level 2 level 1 2 stub area backbone ipnext hopnext hop address Thesetcommandsmodifymatchingroutes Thecommandmodifiesparametersinredistributedroutes RouteMapsandRedistributionCommands Router config routerospf10Router config router redistributeriproute mapredis rip Router config route mapredis rippermit10matchipaddress2329setmetric500setmetric typetype 1route mapredis ripdeny20matchipaddress37route mapredis rippermit30setmetric5000setmetric typetype 2 Routesmatchingeitheraccesslist23or29areredistributedwithanOSPFcostof500 externaltype1 Routespermittedbyaccesslist37arenotredistributed AllotherroutesareredistributedwithanOSPFcostmetricof5000 externaltype2 Router config access list23permit10 1 0 00 0 255 255access list29permit172 16 1 00 0 0 255access list37permit10 0 0 00 255 255 255 AdministrativeDistance AdministrativeDistance Cont distanceadministrativedistance addresswildcard mask access list number name Router config router UsedforallprotocolsexceptEIGRPandBGPredistribution ModifyingAdministrativeDistance distanceeigrpinternal distanceexternal distance Router config router UsedforEIGRP Example RedistributionUsingAdministrativeDistance routerospf1redistributeripmetric10000metric type1subnetsnetwork172 31 0 00 0 255 255area0 routerripversion2redistributeospf1metric5network10 0 0 0noauto summary routerospf1redistributeripmetric10000metric type1subnetsnetwork172 31 3 20 0 0 0area0 routerripversion2redistributeospf1metric5network10 0 0 0noauto summary RouterP3R1 RouterP3R2 Example RedistributionUsingAdministrativeDistance Cont Example RedistributionUsingAdministrativeDistance Cont Example RedistributionUsingAdministrativeDistance Cont hostnameP3R1 routerospf1redistributeripmetric10000metric type1subnetsnetwork172 31 0 00 0 255 255area0distance1250 0 0 0255 255 255 25564 routerripversion2redistributeospf1metric5network10 0 0 0noauto summary access list64permit10 3 1 00 0 0 255access list64permit10 3 3 00 0 0 255access list64permit10 3 2 00 0 0 255access list64permit10 200 200 31access list64permit10 200 200 34access list64permit10 200 200 32access list64permit10 200 200 33 hostnameP3R2 routerospf1redistributeripmetric10000metric type1subnetsnetwork172 31 3 20 0 0 0area0distance1250 0 0 0255 255 255 25564 routerripversion2redistributeospf1metric5network10 0 0 0noauto summary access list64permit