网络工程 - DHCP 请求失败，正在使用 APIPA - 吾爱随笔录

所以，我在 Packet Tracer 中有以下网络配置。

路由器配置了 DHCP。交换机上的端口配置了访问模式 - 适用于属于 PC 的端口。未使用的端口被关闭。交换机之间的端口以及交换机与路由器之间的端口配置为中继端口。连接到直接连接到 R1 的 S1 的所有 PC 从路由器获取 IP 地址。但是，连接到 S2 和 S3 的 PC 没有，而是收到消息“DHCP 请求失败，正在使用 APIPA”。可能是什么问题呢？

这是配置的链接 - https://1drv.ms/u/s!AiRtffZ-QpFphY8iof_YGdcuua3KXw

R1的配置：

ip dhcp pool Head  
 network 10.10.10.0 255.255.255.0  
 default-router 10.10.10.1  
ip dhcp pool R&D  
 network 10.10.20.0 255.255.255.0  
 default-router 10.10.20.1  
ip dhcp pool M&S  
 network 10.10.30.0 255.255.255.0  
 default-router 10.10.30.1  
ip dhcp pool Lab  
 network 10.10.40.0 255.255.255.0  
 default-router 10.10.40.1  
ip dhcp pool WS  
 network 10.10.50.0 255.255.255.0  
 default-router 10.10.50.1  

no ip cef  
no ipv6 cef  

spanning-tree mode pvst  

interface FastEthernet0/0  
 no ip address  
 ip nat inside  
 duplex auto  
 speed auto  
!  
interface FastEthernet0/0.1  
 encapsulation dot1Q 1 native  
 ip address 10.10.1.1 255.255.255.0  
!  
interface FastEthernet0/0.10  
 encapsulation dot1Q 10  
 ip address 10.10.10.1 255.255.255.0  
!  
interface FastEthernet0/0.20  
 encapsulation dot1Q 20  
 ip address 10.10.20.1 255.255.255.0  
!  
interface FastEthernet0/0.30  
 encapsulation dot1Q 30  
 ip address 10.10.30.1 255.255.255.0  
!  
interface FastEthernet0/0.40  
 encapsulation dot1Q 40  
 ip address 10.10.40.1 255.255.255.0  
!  
interface FastEthernet0/0.50  
 encapsulation dot1Q 50  
 ip address 10.10.50.1 255.255.255.0  
!  
interface FastEthernet0/0.99  
 encapsulation dot1Q 99  
 ip address 10.10.99.1 255.255.255.0  
!  
interface FastEthernet0/1  
 ip address 85.143.163.237 255.255.255.0  
 ip nat outside  
 duplex auto  
 speed auto  

interface Vlan1  
 no ip address  
 shutdown  

ip nat inside source list 1 interface FastEthernet0/1 overload  
ip classless  

ip flow-export version 9  

access-list 1 permit 10.10.0.0 0.0.255.255  

line con 0  

line aux 0  

line vty 0 4  
 login

S1的配置：

spanning-tree mode pvst  
!  
interface FastEthernet0/1   
 switchport mode trunk  
!  
interface FastEthernet0/2  
 switchport mode trunk  
!  
interface FastEthernet0/3  
 shutdown  
!  
interface FastEthernet0/4  
 switchport mode trunk  
!  
interface FastEthernet0/5  
 shutdown  
!  
interface FastEthernet0/6  
 shutdown  
!  
interface FastEthernet0/7  
 shutdown   
!  
interface FastEthernet0/8  
 shutdown  
!  
interface FastEthernet0/9  
 shutdown  
!  
interface FastEthernet0/10  
 switchport access vlan 20  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/11   
 switchport access vlan 20  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/12  
 switchport access vlan 20  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/13  
 switchport access vlan 20  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/14  
 switchport access vlan 20  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/15  
 switchport access vlan 10  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/16  
 switchport access vlan 10  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/17  
 switchport access vlan 30  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/18  
 switchport access vlan 30  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/19  
 switchport access vlan 30  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/20  
 switchport access vlan 30  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/21  
 switchport access vlan 20  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/22  
 switchport access vlan 20  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/23  
 switchport access vlan 30  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/24  
 shutdown  
!  
interface Vlan1  
 no ip address  
 shutdown  
!  
interface Vlan99  
 ip address 10.10.99.10 255.255.255.0  
!  
ip default-gateway 10.10.99.1  

line con 0  
!  
line vty 0 4  
 login  
line vty 5 15  
 login  
!

S2的配置：

spanning-tree mode pvst  
!  
interface FastEthernet0/1  
 shutdown  
!  
interface FastEthernet0/2  
 switchport mode trunk  
!  
interface FastEthernet0/3  
 switchport mode trunk  
!  
interface FastEthernet0/4  
 shutdown  
!  
interface FastEthernet0/5  
 shutdown  
!  
interface FastEthernet0/6  
 shutdown  
!  
interface FastEthernet0/7  
 shutdown  
!  
interface FastEthernet0/8  
 shutdown  
!  
interface FastEthernet0/9  
 shutdown  
!  
interface FastEthernet0/10  
 switchport access vlan 40  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/11  
 switchport access vlan 40  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/12  
 switchport access vlan 40  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/13  
 switchport access vlan 40  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/14  
 switchport access vlan 40  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/15  
 switchport access vlan 40  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/16  
 shutdown  
!  
interface FastEthernet0/17  
 shutdown  
!  
interface FastEthernet0/18   
 shutdown  
!  
interface FastEthernet0/19  
 shutdown  
!  
interface FastEthernet0/20  
 shutdown  
!  
interface FastEthernet0/21  
 shutdown  
!  
interface FastEthernet0/22  
 shutdown  
!  
interface FastEthernet0/23  
 shutdown  
!  
interface FastEthernet0/24  
 shutdown  
!  
interface Vlan1  
 no ip address  
 shutdown  
!  
interface Vlan99  
 ip address 10.10.99.20 255.255.255.0  
!  
ip default-gateway 10.10.99.1  

line con 0  
!  
line vty 0 4  
 login  
line vty 5 15  
 login  
!

S3的配置：

spanning-tree mode pvst  
!  
interface FastEthernet0/1  
 shutdown  
!  
interface FastEthernet0/2  
 shutdown  
!  
interface FastEthernet0/3  
!  
interface FastEthernet0/4  
!  
interface FastEthernet0/5  
 shutdown  
!  
interface FastEthernet0/6  
 shutdown  
!  
interface FastEthernet0/7  
 shutdown  
!  
interface FastEthernet0/8  
 shutdown  
!  
interface FastEthernet0/9  
 shutdown  
!  
interface FastEthernet0/10  
 switchport access vlan 50  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/11  
 switchport access vlan 50  
 switchport mode access  
 spanning-tree portfast  
!  
interface FastEthernet0/12  
 shutdown  
!  
interface FastEthernet0/13  
 shutdown  
!  
interface FastEthernet0/14  
 shutdown  
!  
interface FastEthernet0/15  
 shutdown  
!  
interface FastEthernet0/16  
 shutdown  
!  
interface FastEthernet0/17  
 shutdown  
!  
interface FastEthernet0/18  
 shutdown  
!  
interface FastEthernet0/19  
 shutdown  
!  
interface FastEthernet0/20   
 shutdown  
!  
interface FastEthernet0/21  
 shutdown  
!  
interface FastEthernet0/22  
 shutdown  
!  
interface FastEthernet0/23  
 shutdown  
!  
interface FastEthernet0/24  
 shutdown  
!  
interface Vlan1  
 no ip address  
 shutdown  
!  
interface Vlan99  
 ip address 10.10.99.30 255.255.255.0  
!  
ip default-gateway 10.10.99.1  

line con 0  
!  
line vty 0 4  
 login  
line vty 5 15  
 login  
!