锐捷系列 跨交换机实现DHCP
设备： 一台锐捷RG-S3760-24三层交换机和一台RG-S2026F两层交换机6台PC
拓扑：
VLAN ID IP PC 接口
VLAN 10 IP 192.168.1.1 PC1 三层交换机上F0/1接口
VLAN 20 IP 192.168.2.1 PC2 二层交换机上F0/1接口
S3760:
Switch>en
Switch#conf
Switch(config)#ho 3c
3c(config)#service dhcp/开启DHCP服务
3c(config)#vlan 10/创建vlan 10
3c(config-vlan)#exit
3c(config)#vlan 20/创建vlan 20
3c(config-vlan)#exit
3c(config)#int range f0/1,f0/3-5/进入不连续端口的命令和格式
3c(config-if-range)#swi acc vlan 10/把以上端口划分到vlan10中
3c(config-if-range)#int range f0/6-12/进入同一组端口
3c(config-if-range)#swi acc vlan 20/把以上端口划分到vlan20中
3c(config-if-range)#int vlan 10/进入vlan10中
3c(config-if)#ip add 192.168.1.1 255.255.255.0/配置IP地址和子网掩码
3c(config-if)#no shutdown/启用该端口
3c(config-if)#exit
3c(config)#int vlan 20
3c(config-if)#ip add 192.168.2.1 255.255.255.0
3c(config-if)#no shutdown
3c(config-if)#int f0/2
3c(config-if)#swi mode trunk/设为TRUNK口
3c(config-if)#ip dhcp excluded-address 192.168.1.1/排除192.168.1.1这个地址，这个地址
作为网关
3c(config)#ip dhcp pool vlan10/创建名为VLAN10的地址池
3c(dhcp-config)#network 192.168.1.0 255.255.255.0/可分配的ip地址为192.168.1.0段
3c(dhcp-config)#default-router 192.168.1.1/配置默认网关
3c(dhcp-config)#dns-server 61.177.7.1/配置DNS地址
3c(dhcp-config)#lease 2/设置租期为2天，如果设为永久就不行了
3c(dhcp-config)#domanin-name abc.cn/配置域
3c(dhcp-config)#exit
3c(config)#ip dhcp excluded-address 192.168.2.1
3c(config)#ip dhcp pool vlan20
3c(dhcp-config)#network 192.168.2.0 255.255.255.0
3c(dhcp-config)#default-router 192.168.2.1
3c(dhcp-config)#dns-server 61.177.7.1
3c(dhcp-config)#lease 2
3c(dhcp-config)#domanin-name abc.cn
3c(dhcp-config)#exit
3c(config)#
S2026F:
Switch(config)#ho 2c
2c(config)#vlan 10
2c(config-vlan)#exit
2c(config)#vlan 20
2c(config-if-range)#exit
2c(config)#int range f0/6-12
2c(config-if-range)#swi acc vlan 20
2c(config-if-range)#exi
2c(config)#int range f0/1,f0/3-5
2c(config-if-range)#swi acc vlan 10
2c(config-if-range)#exit
2c(config)#int f0/2
2c(config-if)#swi mode trunk
2c(config-if)#exit
S3760的show
3c#show runn
hostname 3c
!
!
!
!
ip dhcp excluded-address 192.168.1.1
ip dhcp excluded-address 192.168.2.1
!
ip dhcp pool vlan10
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 61.177.7.1
ip dhcp pool vlan20
network 192.168.2.0 255.255.255.0
default-router 192.168.2.1
dns-server 61.177.7.1
!
!
!
!
!
!
!
interface FastEthernet0/1
switchport access vlan 10
!
interface FastEthernet0/2
switchport mode trunk
!
interface FastEthernet0/3
switchport access vlan 10
!
interface FastEthernet0/4
switchport access vlan 10
!
interface FastEthernet0/5
switchport access vlan 10
!
interface FastEthernet0/6
switchport access vlan 20
!
interface FastEthernet0/7
switchport access vlan 20
!
interface FastEthernet0/8
switchport access vlan 20
!
interface FastEthernet0/9
switchport access vlan 20
!
interface FastEthernet0/10
switchport access vlan 20
!
interface FastEthernet0/11
switchport access vlan 20
!
interface FastEthernet0/12
switchport access vlan 20
!
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
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
interface Vlan10
ip address 192.168.1.1 255.255.255.0
!
interface Vlan20
ip address 192.168.2.1 255.255.255.0
!
ip classless
!
line con 0
line vty 0 4
login
!
!
!
end
S2026F的show:
hostname 2c
!
!
!
interface FastEthernet0/1
switchport access vlan 10
!
interface FastEthernet0/2
switchport access vlan 10
switchport mode trunk
!
interface FastEthernet0/3
switchport access vlan 10
!
interface FastEthernet0/4
switchport access vlan 10
!
interface FastEthernet0/5
switchport access vlan 10
!
interface FastEthernet0/6
switchport access vlan 20
!
interface FastEthernet0/7
switchport access vlan 20
!
interface FastEthernet0/8
switchport access vlan 20
!
interface FastEthernet0/9
switchport access vlan 20
!
interface FastEthernet0/10
switchport access vlan 20
!
interface FastEthernet0/11
switchport access vlan 20
!
interface FastEthernet0/12
switchport access vlan 20
!
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
!
interface GigabitEthernet1/1
!
interface GigabitEthernet1/2
!
interface Vlan1
no ip address
shutdown
!
!
line con 0
!
line vty 0 4
login
line vty 5 15
login
!
!
end
PC1>ipconfig /all
Physical Address................: 000A.4111.7CD0
IP Address......................: 192.168.1.2
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1
DNS Servers.....................: 61.177.7.1
PC2>ipconfig /all
Physical Address................: 00E0.F753.2931
IP Address......................: 192.168.1.3
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1
DNS Servers.....................: 61.177.7.1
把pc1插在vlan20的接口内，就会分配为2.0段的地址
把pc2插在vlan10，vlan20的接口内，就会分配地址了！
这样跨交换机实现VLAN总算实现了，
本来这个挺简单的，但是搞了我一下午，后来才发现原因，就是租期不能设为永久，第二个就是给
vlan10划分地址的其实就是给名为vlan10的DHCP服务器划分地址
感悟：做技术这行有些东西，看似简单但是如果做的话就会发现各种问题了！
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