11-探索路由功能.pdfVIP免费

Ender204426777乾颐堂CCNAv3.0课程初探路由知识乾颐堂CCNAv3.0Ender204426777RoleofaRouterRoutersarerequiredtoreachhoststhatarenotinthelocalnetwork.路由目的地到不在本地的数据包到其他网络•Routersusearoutingtabletoroutebetweennetworks.路由器构建路由表在不同网络间路由数据包EnderICND1—2-59乾颐堂CCNAv3.0Ender204426777RouterCharacteristicsRoutercomponents:•CPU•Motherboard•Memory•Ports–Management:Fortheconnectionofaterminalusedformanagement–Network:VariousLANorWANmediaportsExampleEnderICND1—2-60乾颐堂CCNAv3.0Ender204426777RouterFunctions•Pathdetermination-路由决策•Packetforwarding-报文转发RouterA#showiprouteCodes:L-local,C-connected,S-static,R-RIP,M-mobile,B-BGPD-EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterareaN1-OSPFNSSAexternaltype1,N2-OSPFNSSAexternaltype2E1-OSPFexternaltype1,E2-OSPFexternaltype2Gatewayoflastresortisnotset172.17.0.0/16isvariablysubnetted,8subnetsO172.17.14.0/24[110/51]via172.17.100.22,1d05hB172.17.25.0/24[200/0]via172.17.100.22,6d05hD172.17.43.0/24[90/30720]via172.17.50.4,3d20h,GigabitEthernet0/0C172.17.50.0/24isdirectlyconnected,GigabitEthernet0/0L172.17.50.2/32isdirectlyconnected,GigabitEthernet0/0S172.17.92.0/24[1/0]via172.17.50.4C172.17.100.0/24isdirectlyconnected,GigabitEthernet0/1L1721710012/32isdirectlyconnectedGigabitEthernet0/1•RoutingtableonRouterAEnderICND1—2-61乾颐堂CCNAv3.0Ender204426777PathDetermination•Routersselectthebestpathtothedestinationamongvarioussources.路由器通常通过某种规则选择到达目标的最优的路径•Administrativedistancedefinesthereliabilityoftheroutesource.管理距离定义了不同路由协议的可靠性EnderICND1—2-62乾颐堂CCNAv3.0Ender204426777RoutingTableAroutingtablelistsallknowndestinationsandinformationabouthowtoreachthem.EnderICND1—2-63乾颐堂CCNAv3.0Ender204426777TypesofRoutesRouterA#showiprouteCodes:L-local,C-connected,S-static,R-RIP,M-mobile,B-BGPD-EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterareaN1-OSPFNSSAexternaltype1,N2-OSPFNSSAexternaltype2E1-OSPFexternaltype1,E2-OSPFexternaltype2i-IS-IS,su-IS-ISsummar...