路由是指導(dǎo)IP在網(wǎng)段的路由寫入路由表，這些路由被稱為直連路由（DirectRoute），它們在路由

yiprouting-RouteFlags:R-relay,D-downloadtoRoutingTables:Destinations: Routes:Flags00

使用 yipinterfacebrief能夠查看到這兩個狀

yiprouting-RouteFlags:R-relay,D-downloadtoRoutingTables:Destinations: Routes:

Pre

Flags

IGPs：RIP

0OSPF

yyiprouting-Destination/MaskProtoPreCostFlags OSPF10 30.1.1.2 yiprouting-

RouteFlags:R-relay,D-downloadtoDestinations: Routes: Pre Flags 0GigabitEthernet000D00D由表中，IP包會在這幾個鏈 A→B→C→D，總開銷 總開銷B 8[RTB]dis yiprouting-tableRoutingTables:PublicDestinations: Routes:

Pre

0000000000000

網(wǎng)關(guān)

網(wǎng)關(guān)

[Routeriproute-static下一跳IP[Routeriproute-static[R1][R1]iproute-static192.168.100.0255.255.255.0[R1]iproute-static192.168.100.024[R1]iproute-static192.168.23.024[R3]iproute-static192.168.12.024通信是雙向的，因此要留意往返流量（的路由）yyiprouting-RouteFlags:R-relay,D-downloadtoRoutingTables:Destinations:Routes:PreFlags192.168.12.0/24Direct192.168.23.0/24Static00

[RTB]ip[RTB]iproute-static192.168.1.0255.255.255.0[RTB]iproute-static192.168.1.0255.255.255.0yiprouting-RouteFlags:R-relay,D-downloadtoRoutingTables:PublicDestinations:Routes:ProtoPreCostFlagsNextHopStaticStatic00RD10.0.12.1GigabitEthernetRD20.0.12.1GigabitEthernet

[RTB]ip[RTB]iproute-static192.168.1.0255.255.255.0[RTB]iproute-static192.168.1.0255.255.255.020.0.12.1preference

[RTA]iproute-static[RTA]iproute-static0.0.0.00.0.0.0缺省路由是目的地址和掩碼都為全0 yiprouting-RouteFlags:R-relay,D-downloadtoRoutingTables:PublicDestinations:13 Routes:14Destination/MaskProtoPreCostFlagsNextHopInterface Static 0 10.0.12.2 可