实验拓扑配置ip地址略：[AR1]display ip interface brief *down: administratively down!down: FIB overload down^dow
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实验拓扑
配置ip地址略：
[AR1]display ip interface brief *down: administratively down!down: FIB overload down^down: standby(l): loopback(s): spoofing(d): Dampening SuppressedThe number of interface that is UP in Physical is 4The number of interface that is DOWN in Physical is 7The number of interface that is UP in Protocol is 4The number of interface that is DOWN in Protocol is 7Interface IP Address/Mask Physical Protocol Ethernet0/0/0 unassigned down down Ethernet0/0/1 unassigned down down GigabitEthernet0/0/0 200.1.1.1/24 up up GigabitEthernet0/0/1 200.1.3.1/24 up up GigabitEthernet0/0/2 192.168.1.254/24 up up GigabitEthernet0/0/3 unassigned down down NULL0 unassigned up up(s) Serial0/0/0 unassigned down down Serial0/0/1 unassigned down down Serial0/0/2 unassigned down down Serial0/0/3 unassigned down down [AR2]display ip interface brief *down: administratively down^down: standby(l): loopback(s): spoofingThe number of interface that is UP in Physical is 3The number of interface that is DOWN in Physical is 0The number of interface that is UP in Protocol is 3The number of interface that is DOWN in Protocol is 0Interface IP Address/Mask Physical Protocol GigabitEthernet0/0/0 200.1.1.2/24 up up GigabitEthernet0/0/1 200.1.2.2/24 up up [AR3]display ip interface brief *down: administratively down!down: FIB overload down^down: standby(l): loopback(s): spoofing(d): Dampening SuppressedThe number of interface that is UP in Physical is 4The number of interface that is DOWN in Physical is 7The number of interface that is UP in Protocol is 4The number of interface that is DOWN in Protocol is 7Interface IP Address/Mask Physical Protocol Ethernet0/0/0 unassigned down down Ethernet0/0/1 unassigned down down GigabitEthernet0/0/0 200.1.2.3/24 up up GigabitEthernet0/0/1 200.1.1.3/24 up up GigabitEthernet0/0/2 192.168.2.254/24 up up 配置静态路由[AR1]ip route-static 192.168.2.0 24 200.1.3.3[AR3]ip route-static 192.168.1.0 24 200.1.3.1[AR2]ip route-static 192.168.1.0 24 200.1.1.1[AR2]ip route-static 192.168.2.0 24 200.1.1.3PC>tracert 192.168.2.1traceroute to 192.168.2.1, 8 hops max(ICMP), press Ctrl+C to stop 1 192.168.1.254 16 ms 16 ms 31 ms 2 200.1.3.3 62 ms 47 ms 32 ms 3 *192.168.2.1 62 ms 78 ms[AR1]interface GigabitEthernet 0/0/1 [AR1-GigabitEthernet0/0/1]shutdown 4、配置浮动静态路由实现路由备份[AR1]ip route-static 192.168.2.0 24 200.1.1.2 preference 61[AR1]display ip routing-table Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: Public Destinations : 9 Routes : 9 Destination/Mask Proto Pre Cost Flags NextHop Interface 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 192.168.1.0/24 Direct 0 0 D 192.168.1.254 GigabitEthernet0/0/2 192.168.1.254/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/2 192.168.2.0/24 Static 60 0 RD 200.1.3.3 GigabitEthernet0/0/1 200.1.1.0/24 Direct 0 0 D 200.1.1.1 GigabitEthernet0/0/0 200.1.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0 200.1.3.0/24 Direct 0 0 D 200.1.3.1 GigabitEthernet0/0/1 200.1.3.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/1查看路由表发现没有这条路由，原因是优先级高的写入路由表[AR1]display ip routing-table protocol static Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Public routing table : Static Destinations : 1 Routes : 2 Configured Routes : 2Static routing table status : <Active> Destinations : 1 Routes : 1Destination/Mask Proto Pre Cost Flags NextHop Interface 192.168.2.0/24 Static 60 0 RD 200.1.3.3 GigabitEthernet0/0/1Static routing table status : <Inactive> Destinations : 1 Routes : 1Destination/Mask Proto Pre Cost Flags NextHop Interface 192.168.2.0/24 Static 61 0 R 200.1.1.2 GigabitEthernet0/0/0[AR3]ip route-static 192.168.1.0 24 200.1.2.2 preference 61手动制造故障[AR1]interface GigabitEthernet0/0/1[AR1-GigabitEthernet0/0/1]shutdown [AR1-GigabitEthernet0/0/1]display ip routing-table Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: Public Destinations : 7 Routes : 7 Destination/Mask Proto Pre Cost Flags NextHop Interface 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 192.168.1.0/24 Direct 0 0 D 192.168.1.254 GigabitEthernet0/0/2 192.168.1.254/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/2 192.168.2.0/24 Static 61 0 RD 200.1.1.2 GigabitEthernet0/0/0 200.1.1.0/24 Direct 0 0 D 200.1.1.1 GigabitEthernet0/0/0 200.1.1.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0模拟故障前后的路由表变化
等价路由实现负载[AR1]ip route-static 192.168.2.0 24 200.1.1.2Info: Succeeded in modifying route.[AR1]display ip routing-table protocol static Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Public routing table : Static Destinations : 1 Routes : 2 Configured Routes : 2Static routing table status : <Active> Destinations : 1 Routes : 2Destination/Mask Proto Pre Cost Flags NextHop Interface 192.168.2.0/24 Static 60 0 RD 200.1.3.3 GigabitEthernet0/0/1 Static 60 0 RD 200.1.1.2 GigabitEthernet0/0/0Static routing table status : <Inactive> Destinations : 0 Routes : 0[AR3]ip route-static 192.168.1.0 24 200.1.2.2Info: Succeeded in modifying route.[AR3]display ip routing-table Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: Public Destinations : 9 Routes : 10 Destination/Mask Proto Pre Cost Flags NextHop Interface 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 192.168.1.0/24 Static 60 0 RD 200.1.3.1 GigabitEthernet0/0/0 Static 60 0 RD 200.1.2.2 GigabitEthernet0/0/1 192.168.2.0/24 Direct 0 0 D 192.168.2.254 GigabitEthernet0/0/2 192.168.2.254/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/2 200.1.2.0/24 Direct 0 0 D 200.1.2.3 GigabitEthernet0/0/1 200.1.2.3/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/1 200.1.3.0/24 Direct 0 0 D 200.1.3.3 GigabitEthernet0/0/0 200.1.3.3/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0