n 数据包跟踪器 我的无线笔记本电脑可以 ping 网络中的其他 PC，但 PC 无法 ping 笔记本电脑。

> R2(config)#do sh run
Building configuration...

Current configuration : 918 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R2
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX1524A08J
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/1
 ip address 20.1.1.1 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/0/0
 ip address 192.168.10.1 255.255.255.252
!
interface Serial0/0/1
 no ip address
 clock rate 2000000
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 router-id 2.2.2.2
 log-adjacency-changes
 passive-interface GigabitEthernet0/1
 network 192.168.10.0 0.0.0.3 area 0
 network 20.1.1.0 0.0.0.255 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end
======================
R1#sh run
Building configuration...

Current configuration : 971 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX152440EW
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/1
 ip address 10.1.1.1 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/0/0
 ip address 192.168.10.2 255.255.255.252
 clock rate 4000000
!
interface Serial0/0/1
 ip address 192.168.20.1 255.255.255.252
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 router-id 1.1.1.1
 log-adjacency-changes
 passive-interface GigabitEthernet0/1
 network 192.168.10.0 0.0.0.3 area 0
 network 192.168.20.0 0.0.0.3 area 0
 network 10.1.1.0 0.0.0.255 area 0
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end
----------------------
R3#sh run
Building configuration...

Current configuration : 1080 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
!
!
!
!
!
!
!
no ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX15249KO1
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface GigabitEthernet0/1
 ip address 192.168.1.1 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/0/0
 no ip address
 clock rate 2000000
 shutdown
!
interface Serial0/0/1
 ip address 192.168.20.2 255.255.255.252
 clock rate 4000000
!
interface Vlan1
 no ip address
 shutdown
!
router ospf 1
 router-id 3.3.3.3
 log-adjacency-changes
 redistribute static 
 passive-interface GigabitEthernet0/1
 network 192.168.20.0 0.0.0.3 area 0
 network 192.168.1.0 0.0.0.255 area 0
!
ip classless
ip route 192.168.100.0 255.255.255.0 GigabitEthernet0/1 
ip route 192.168.200.0 255.255.255.0 GigabitEthernet0/1 
!
ip flow-export version 9
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end