基础路由回包基本实验

 
 
Setp 1
R1# debug ip packet // 调试 IP
IP packet debugging is on
R1# ping 172.16.12.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/97/208 ms
R1#
*Mar   1 00:05:12.151: IP: tableid=0, s=172.16.12.1 (local), d=172.16.12.2 (FastEthernet0/0), routed via FIB
 
 
Setp 2
R1# ping 172.16.12.2 source 192.168.10.1     
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.2, timeout is 2 seconds:
Packet sent with a source address of 192.168.10.1
.....
Success rate is 0 percent (0/5)
 
R2# debug ip packet //R2 上没有回到 192.168.10.1 的路由表
IP packet debugging is on
R2#
*Mar   1 00:06:20.123: IP: tableid=0, s=192.168.10.1 (FastEthernet0/0), d=172.16.12.2 (FastEthernet0/0), routed via RIB
*Mar   1 00:06:20.123: IP: s=192.168.10.1 (FastEthernet0/0), d=172.16.12.2 (FastEthernet0/0), len 100, rcvd 3
*Mar   1 00:06:20.127: IP: s=172.16.12.2 (local), d=192.168.10.1, len 100, unroutable
 
 
Setp 3
R2(config)# ip route 192.168.10.1 255.255.255.255 172.16.12.1   // 指下一跳的方式
R2(config)#do show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route
 
Gateway of last resort is not set
 
     192.168.10.0/32 is subnetted, 1 subnets
S        192.168.10.1 [1/0] via 172.16.12.1
     172.16.0.0/24 is subnetted, 1 subnets
C        172.16.12.0 is directly connected, FastEthernet0/0
C     192.168.100.0/24 is directly connected, Loopback0
 
R2(config) #ip route 192.168.10.1 255.255.255.255 fastEthernet 0/0      // 指出接口的方式
R2(config)#do show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route
 
Gateway of last resort is not set
 
     192.168.10.0/32 is subnetted, 1 subnets
S        192.168.10.1 is directly connected, FastEthernet0/0
     172.16.0.0/24 is subnetted, 1 subnets
C        172.16.12.0 is directly connected, FastEthernet0/0
C     192.168.100.0/24 is directly connected, Loopback0

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