Question

dhcp 不能获取IP地址，怎么办？

Current configuration : 7993 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime localtime
no service password-encryption
no service dhcp
!
hostname cisco
!
enable secret 5 $1$dh.8$HFcW84vE2AwlNAJ76XotTUAs.
!
no aaa new-model
switch 1 provision ws-c3750g-12s
system mtu routing 1500
vtp mode transparent
ip subnet-zero
ip routing
no ip domain-lookup
ip dhcp excluded-address 192.168.115.1 192.168.115.16
ip dhcp excluded-address 192.168.115.240 192.168.115.254
ip dhcp excluded-address 192.168.116.1 192.168.116.16
ip dhcp excluded-address 192.168.116.240 192.168.116.254
ip dhcp excluded-address 192.168.117.1 192.168.117.16
ip dhcp excluded-address 192.168.117.240 192.168.117.254
!
ip dhcp pool 115
network 192.168.115.0 255.255.255.0
default-router 192.168.115.1
dns-server 218.85.157.99 218.85.152.99
lease 30
!
ip dhcp pool 116
network 192.168.116.0 255.255.255.0
default-router 192.168.116.1
dns-server 218.85.157.99 218.85.152.99
lease 30
!
ip dhcp pool 117
network 192.168.117.0 255.255.255.0
default-router 192.168.117.1
dns-server 218.85.157.99 218.85.152.99
lease 30
!
!
no file verify auto
!
spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree 115,116117,priority 24576
!
vlan internal allocation policy ascending
!
vlan 115,116,117
!
interface GigabitEthernet1/0/1
description :: OA 3F_53
switchport trunk encapsulation dot1q
switchport mode trunk
load-interval 30

interface Vlan115
description ::LnT FJ 2F OA User VLAN::
ip address 192.168.116.2 255.255.255.0 secondary
ip address 192.168.117.2 255.255.255.0 secondary
ip address 192.168.128.2 255.255.255.0 secondary
ip address 192.168.129.2 255.255.255.0 secondary
ip address 192.168.130.2 255.255.255.0 secondary
ip address 192.168.131.2 255.255.255.0 secondary
ip address 192.168.115.2 255.255.255.0
no ip redirects
no ip proxy-arp
standby 115 ip 192.168.115.1
standby 115 ip 192.168.116.1 secondary
standby 115 ip 192.168.117.1 secondary
standby 115 ip 192.168.128.1 secondary
standby 115 ip 192.168.129.1 secondary
standby 115 ip 192.168.130.1 secondary
standby 115 ip 192.168.131.1 secondary
standby 115 priority 105
standby 115 preempt
!

!
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.87.129
ip route 192.168.91.0 255.255.255.0 192.168.87.129
ip route 192.168.114.128 255.255.255.128 192.168.87.146
ip route 192.168.120.0 255.255.248.0 192.168.87.138
ip http server
!

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

Answer 1

所有路由器都有给电脑分配IP地址的功能，所以本地连接的IP地址和DNS都设为自动获取就可以了。但自动获取并不是百试百灵的，建议亲自填写。填了之后可以免去电脑每次开机搜索IP地址造成的迟钝现象。

Answer 2

有可能是DHCP的租期或是地址池问题,你重启一下DHCP的设备吧

Answer 3

是设置的自动获取吗？？？

追问

是的，之前还用得好好的，看来就不行了。