Dhcp中继服务器实现dhcp服务
试验目的：中继实现dhcp服务器的ip地址分配
试验环境：linux5.4 操作系统、华为路由器R2621 、华为交换机S2000 、windows客户机
网线数条和usb Serial 线 一根
实验拓扑图：
试验步骤：
首先配置华为S2000 交换机：
[Quidway]vlan 10
[Quidway-vlan10]port e1/0/10
[Quidway-vlan10]vlan 20
[Quidway-vlan20]port e1/0/20
[Quidway-vlan20]vlan 30
[Quidway-vlan30]port e1/0/22
[Quidway-vlan30]int e1/0/24
[Quidway-Ethernet1/0/24]port link-
[Quidway-Ethernet1/0/24]port link-type trunk#给24端口打trunk#
[Quidway-Ethernet1/0/24]port trunk permit vlan all#允许所有vlan通过#
查看一下交换机配置：
<Quidway>dis vlan 10
VLAN ID: 10
VLAN Type: static
Route Interface: not configured
Description: VLAN 0010
Name: VLAN 0010
Tagged Ports:
Ethernet1/0/24
Untagged Ports:
Ethernet1/0/10
<Quidway>dis vlan 20
VLAN ID: 20
VLAN Type: static
Route Interface: not configured
Description: VLAN 0020
Name: VLAN 0020
Tagged Ports:
Ethernet1/0/24
Untagged Ports:
Ethernet1/0/20
<Quidway>dis vlan 30
VLAN ID: 30
VLAN Type: static
Route Interface: not configured
Description: VLAN 0030
Name: VLAN 0030
Tagged Ports:
Ethernet1/0/24
Untagged Ports:
Ethernet1/0/22
<Quidway>dis ine e1/0/24
PVID: 1
Mdi type: normal
Port link-type: trunk
VLAN passing : 1(default vlan), 10, 20, 30 #现在有的vlan 10、20、30都可以通过。#
Trunk port encapsulation: IEEE 802.1q
再来华为路由器，型号：R3621
[Router]int e0.1#配置子接口#
[Router-Ethernet0.1]vlan-type dot1q vid 10#把这个子接口划分到vlan10内#
[Router-Ethernet0.1]ip add 192.168.10.1 24#子接口配置vlan 10的ip#
[Router]int eth0.2
[Router-Ethernet0.2]vlan-type dot1q vid 20
[Router-Ethernet0.2]ip add 192.168.20.1 24
[Router-Ethernet0.2]int e0.3
[Router-Ethernet0.3]vlan-type dot1q vid 30
[Router-Ethernet0.3]ip add 192.168.30.1 24
#配置中继ip地址#
[Router]int eth0.1
[Router-Ethernet0.1]ip relay-address 192.168.30.100
[Router-Ethernet0.1]int eth0.2
[Router-Ethernet0.2]ip relay-address 192.168.30.100
路由器完整配置：
[Router]dis cu
Now create configuration...
Current configuration
!
version 1.74
undo pos-server addr-switch
firewall enable
aaa-enable
aaa accounting-scheme optional
!
controller e1 0
!
interface Aux0
async mode flow
link-protocol ppp
!
interface Ethernet0
!
interface Ethernet0.1
vlan-type dot1q vid 10
ip address 192.168.10.1 255.255.255.0
ip relay-address 192.168.30.100
!
interface Ethernet0.2
vlan-type dot1q vid 20
ip address 192.168.20.1 255.255.255.0
ip relay-address 192.168.30.100
!
interface Ethernet0.3
vlan-type dot1q vid 30
ip address 192.168.30.1 255.255.255.0
!
interface Ethernet1
!
interface Serial0
link-protocol ppp
!
interface Serial1
link-protocol ppp
!
Return
交换机路由器配置好后，我们来到linux上配置dhcp服务器。
现在我们来修该配置文件：
Vim /etc/dhcpd.conf
启动dhcp服务器：
Service dhcpd restart
这时我们用windows server 2003 客户机测试下dhcp服务器的服务是否正常。
测试：
[Router]ping 192.168.30.1 #和vlan 30 可以通信#
PING 192.168.30.1: 56 data bytes, press CTRL_C to break
Reply from 192.168.30.1: bytes=56 Sequence=0 ttl=255 time = 1 ms
Reply from 192.168.30.1: bytes=56 Sequence=1 ttl=255 time = 1 ms
Reply from 192.168.30.1: bytes=56 Sequence=2 ttl=255 time = 2 ms
Reply from 192.168.30.1: bytes=56 Sequence=3 ttl=255 time = 1 ms
Reply from 192.168.30.1: bytes=56 Sequence=4 ttl=255 time = 1 ms
--- 192.168.30.1 ping statistics ---
5 packets transmitted
5 packets received
0.00% packet loss
round-trip min/avg/max = 1/1/2 ms
[Router]ping 192.168.20.1#和vlan 20可以通信#
PING 192.168.20.1: 56 data bytes, press CTRL_C to break
Reply from 192.168.20.1: bytes=56 Sequence=0 ttl=255 time = 1 ms
Reply from 192.168.20.1: bytes=56 Sequence=1 ttl=255 time = 1 ms
Reply from 192.168.20.1: bytes=56 Sequence=2 ttl=255 time = 1 ms
Reply from 192.168.20.1: bytes=56 Sequence=3 ttl=255 time = 1 ms
Reply from 192.168.20.1: bytes=56 Sequence=4 ttl=255 time = 1 ms
--- 192.168.20.1 ping statistics ---
5 packets transmitted
5 packets received
0.00% packet loss
round-trip min/avg/max = 1/1/1 ms
[Router]ping 192.168.30.100#和中继服务器也可以实现通信#
PING 192.168.30.100: 56 data bytes, press CTRL_C to break
Request time out
Request time out
Request time out
Request time out
Request time out
--- 192.168.30.100 ping statistics ---
5 packets transmitted
0 packets received
100.00% packet loss
下面用客户机测试是否能够获取linux 5.4 上的dhcp服务器能否为客户机自动分配ip。
这样看来我们的dhcp服务器可以自动给客户机分配地址池中ip。