ICMP 消息不会离开 PC 的 NIC

网络工程 路由 VLAN 交换 平 数据包追踪器
2021-07-23 20:27:59

我得到了一个 VLAN 间配置，又名“棒上路由器”。除了 PC9（参考图片），我可以互相 ping 通所有工作站。我做了一个模拟，发现数据包甚至没有离开PC。有谁知道发生了什么？我真的什么都试过了。

提前致谢。

附注。PT 版本：7.2.2 项目 (.pkt)项目截图

配置：

PC9

Link-local IPv6 Address.........: FE80::20A:41FF:FEA4:C69
 IP Address......................: 5.0.0.3
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 5.0.0.1

笔记本0

Link-local IPv6 Address.........: FE80::204:9AFF:FEA9:CA5A
 IP Address......................: 3.0.0.4
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 3.0.0.1

笔记本电脑1

Link-local IPv6 Address.........: FE80::201:97FF:FE30:1E61
 IP Address......................: 1.0.0.5
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 1.0.0.1

开关2

version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
interface FastEthernet0/1
 switchport access vlan 500
!
interface FastEthernet0/2
 switchport access vlan 300
!
interface FastEthernet0/3
 switchport access vlan 100
!
interface FastEthernet0/4
 switchport access vlan 200
!
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
 switchport access vlan 400
!
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
 switchport trunk allowed vlan 100,200,300,400,500
 switchport mode trunk
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
 no ip address
 shutdown
!
!
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
!
!
end

开关1

version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
interface FastEthernet0/1
 switchport access vlan 300
!
interface FastEthernet0/2
 switchport access vlan 100
!
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
 switchport trunk allowed vlan 100,200,300,400,500
 switchport mode trunk
!
interface FastEthernet0/24
 switchport trunk allowed vlan 100,200,300,400,500
 switchport mode trunk
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
 no ip address
 shutdown
!
!
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
!
!
end

PC7

Link-local IPv6 Address.........: FE80::2D0:BAFF:FEB0:5E66
 IP Address......................: 1.0.0.4
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 1.0.0.1

PC8

Link-local IPv6 Address.........: FE80::260:70FF:FE25:2A79
 IP Address......................: 3.0.0.3
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 3.0.0.1

开关0

version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
interface FastEthernet0/1
 switchport access vlan 100
!
interface FastEthernet0/2
 switchport access vlan 100
!
interface FastEthernet0/3
 switchport access vlan 300
!
interface FastEthernet0/4
 switchport access vlan 200
!
interface FastEthernet0/5
 switchport access vlan 200
!
interface FastEthernet0/6
 switchport access vlan 400
!
interface FastEthernet0/7
 switchport access vlan 500
!
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
 switchport trunk allowed vlan 100,200,300,400,500
 switchport mode trunk
!
interface GigabitEthernet0/1
 switchport trunk allowed vlan 100,200,300,400,500
 switchport mode trunk
!
interface GigabitEthernet0/2
!
interface Vlan1
 no ip address
 shutdown
!
!
!
!
line con 0
!
line vty 0 4
 login
line vty 5 15
 login
!
!
!
!
end

电脑0

Link-local IPv6 Address.........: FE80::201:97FF:FEDE:66A4
 IP Address......................: 1.0.0.2
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 1.0.0.1

电脑1

Link-local IPv6 Address.........: FE80::209:7CFF:FED7:7329
 IP Address......................: 1.0.0.3
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 1.0.0.1

电脑2

Link-local IPv6 Address.........: FE80::230:A3FF:FE8A:3CAC
 IP Address......................: 3.0.0.2
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 3.0.0.1

电脑3

Link-local IPv6 Address.........: FE80::260:70FF:FE9A:323B
 IP Address......................: 2.0.0.2
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 2.0.0.1

PC4

Link-local IPv6 Address.........: FE80::2D0:97FF:FEB6:BED1
 IP Address......................: 2.0.0.4
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 2.0.0.1

电脑5

Link-local IPv6 Address.........: FE80::260:2FFF:FE65:3BE
 IP Address......................: 4.0.0.2
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 4.0.0.1

PC6

Link-local IPv6 Address.........: FE80::201:C9FF:FE32:3C3C
 IP Address......................: 5.0.0.2
 Subnet Mask.....................: 255.0.0.0
 Default Gateway.................: 5.0.0.1

路由器0

version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
!
license udi pid CISCO1941/K9 sn FTX15242839-
!
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
!
!
interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
!
interface GigabitEthernet0/0.100
 encapsulation dot1Q 100
 ip address 1.0.0.1 255.0.0.0
!
interface GigabitEthernet0/0.200
 encapsulation dot1Q 200
 ip address 2.0.0.1 255.0.0.0
!
interface GigabitEthernet0/0.300
 encapsulation dot1Q 300
 ip address 3.0.0.1 255.0.0.0
!
interface GigabitEthernet0/0.400
 encapsulation dot1Q 400
 ip address 4.0.0.1 255.0.0.0
!
interface GigabitEthernet0/0.500
 encapsulation dot1Q 500
 ip address 5.0.0.1 255.0.0.0
!
interface GigabitEthernet0/1
 no ip address
 duplex auto
 speed auto
 shutdown
!
interface Vlan1
 no ip address
 shutdown
!
ip classless
!
ip flow-export version 9
!
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
 login
!
!
!
end
1个回答

如果回声请求甚至没有离开源，源和它的默认网关之间就没有连接（公共广播域）——网关的 ARP 请求失败，就是这样。

show mac address-table依次在每台交换机上使用，以确保交换机可以看到所需 VLAN 中的源和网关。

还要确保在使用或转发它们的所有交换机上实际创建了 VLAN。

其它你可能感兴趣的问题
上一篇正确的 vlan/接口配置以连接到上游提供商网络 下一篇同一个wifi局域网内的两台电脑可以不用路由器直接通讯吗？