Dhcp中繼服務器實現dhcp服務
試驗目的：中繼實現dhcp服務器的ip地址分配
試驗環境：linux5.4 操作系統、華爲路由器R2621 、華爲交換機S2000 、windows客戶機
網線數條和usb Serial 線 一根
實驗拓撲圖：
試驗步驟：
首先配置華爲S2000 交換機：
[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#給24端口打trunk#
[Quidway-Ethernet1/0/24]port trunk permit vlan all#允許所有vlan通過#
查看一下交換機配置：
<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 #現在有的vlan 10、20、30都可以通過。#
Trunk port encapsulation: IEEE 802.1q
再來華爲路由器，型號：R3621
[Router]int e0.1#配置子接口#
[Router-Ethernet0.1]vlan-type dot1q vid 10#把這個子接口劃分到vlan10內#
[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
#配置中繼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
交換機路由器配置好後，我們來到linux上配置dhcp服務器。
現在我們來修該配置文件：
Vim /etc/dhcpd.conf
啓動dhcp服務器：
Service dhcpd restart
這時我們用windows server 2003 客戶機測試下dhcp服務器的服務是否正常。
測試：
[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#和中繼服務器也可以實現通信#
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
下面用客戶機測試是否能夠獲取linux 5.4 上的dhcp服務器能否爲客戶機自動分配ip。
這樣看來我們的dhcp服務器可以自動給客戶機分配地址池中ip。