ping显示不同的输出。

Question

两个VLANS都在工作，从R1到R0的ping也成功地工作了，反之亦然。但是当我从粉红色的PC机切换到蓝色的PC机时，我得到了无法到达的目的地，当我从蓝色的PC机发送到粉红色的PC机时，我得到请求超时的时间。错误在哪里？

SW0配置：

    SW0#show running-config 
Building configuration...

Current configuration : 1129 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname SW0
!
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
interface FastEthernet0/1
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
 ip address 191.120.128.2 255.255.255.128
!
ip default-gateway 191.120.128.1
!
!
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
!
!
end

滚装配置：

R0#show running-config 
Building configuration...

Current configuration : 587 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R0
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 191.120.128.1 255.255.255.128
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 191.120.128.193 255.255.255.252
 duplex auto
 speed auto
!
ip classless
ip route 191.120.128.0 255.255.255.128 191.120.128.194 
!
ip flow-export version 9
!
!
!
no cdp run
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end

R1配置：

R1#show running-config 
Building configuration...

Current configuration : 634 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R1
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 191.120.128.194 255.255.255.252
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 191.120.128.129 255.255.255.192
 duplex auto
 speed auto
!
ip classless
ip route 191.120.128.0 255.255.255.128 191.120.128.193 
ip route 191.120.128.128 255.255.255.192 191.120.128.193 
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end

SW1配置：

SW1#show running-config 
Building configuration...

Current configuration : 1133 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname SW1
!
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
interface FastEthernet0/1
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
 ip address 191.120.128.130 255.255.255.192
!
ip default-gateway 191.120.128.129
!
!
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
!
!
end

Answer 1

R0错过了一条通往子网C的路由，191.120.120.128/26。

R0从粉红色到蓝色，将ICMP错误返回给回送请求发件人，提示消息。R0向相反的方向单击，将ICMP错误返回给回送回复发送方，该发送方没有要通知的用户进程。

请注意，您使用的地址不是私有的，因此连接该网络到Internet会有问题。查看RFC 1918的专用地址范围(192.168.0.0/16、172.16.0.0/12、10.0.0.0/8)。