要求：

某企业，专线接入，有华为路由器一台，三层交换机一台，二层交换机若干；

1、要求划几个VLAN，为不同部门。

2、所有主机能够通过路由器上网。

设计思路：

1、路由器配置比较简单，主要做NAT转换和ACL控制哪些主机能上外网；

2、三层交换机，划分VLAN，实现内部VLAN间路由，可直接接终端或二层交换机

3、二层交换相接终端。。

设计时，关于防病毒ACL列表、VLAN间互联隔离技术等问题此处未讨论。感兴趣的朋友，我们可以另起篇章进行讨论。

本设计以华为产品为例，思科产品配置原理相同，只是命令行不同而已。欢迎有志之士把它翻译成思科的配置。

基实也可以不要三层交换机，直接在路由器上做单臂也可以。。只是不适合复杂的网络和发展。。

配置：

一、路由器配置

version 5.20, Release 1205P02, Basic
#
给路由器命名
sysname HUAWE-ROUTE
#
domain default enable system
#
vlan 1
#
radius scheme system
server-type extended
primary authentication 127.0.0.1 1645
primary accounting 127.0.0.1 1646
user-name-format without-domain
#
domain system
access-limit disable
state active
idle-cut disable
self-service-url disable
#
定义ACL列表，允许所有IP访问外网，这里你可以指定允许某些或禁止某些主机上网。
acl number 2000
rule 0 permit
#
interface Aux0 
async mode flow
link-protocol ppp
#
接专线的接口，配置运营商分配的IP
interface Ethernet0/0
nat outbound 2000
duplex full
speed 100
ip address 218.22.3.126 255.255.255.252
#
接局域网三层交换机的地址
interface Ethernet0/1
DESC TO—SWitch
duplex full
speed 100
ip address 192.168.8.1 255.255.255.252
#

interface NULL0
#
至公网默认路由
ip route-static 0.0.0.0 0.0.0.0 218.22.3.125
至三层交换机回程路由
ip route-static 192.168.0.0 255.255.0.0   192.168.8.2
#
user-interface con 0
user-interface aux 0
未设置TELNET登陆密码，这样外网的人登陆不了，当然你也登陆不了。哈安全吧。（如果想TELNET，需要设置密码和ACL禁止外网的人登陆）
user-interface vty 0 4
#              
Return

二、三层交换配置

#
给交换机命名
sysname hwswich
#

设备SUPER密码
 super password level 3 cipher ;1>$VGEA)N2C+1!!
#
radius scheme system
 server-type huawei
 primary authentication 127.0.0.1 1645
 primary accounting 127.0.0.1 1646
 user-name-format without-domain

domain system
 radius-scheme system
 access-limit disable
 state active
 vlan-assignment-mode integer
 idle-cut disable
 self-service-url disable
 messenger time disable

domain default enable system
#
 local-server nas-ip 127.0.0.1 key huawei                            

建立业务VLAN及与路由器互联口VLAN
vlan 5
desc  to-router
#
vlan 10
desc bumen1
#
vlan  20                                  
desc bumen2
#
分别给SVI接口设计IP地址，即所属VLAN  PC终端的网关
#
interface Vlan-interface 5
DESC to-router
ip address 192.168.8.2  255.255.255.252

interface Vlan-interface 10
ip address 192.168.1.1  255.255.255.0
#
interface Vlan-interface 20
ip address 192.168.2.1  255.255.255.0
#

与二层交换机互联接口
interface Ethernet0/1
duplex full                             
 speed 100
 port link-type trunk
port trunk permit vlan 10 20
#
接普通终端的接口
interface Ethernet0/2
 port access vlan  10
#
interface Ethernet0/3
 port access vlan  20
#
interface Ethernet0/4
 shutdown
#
interface Ethernet0/5
#
interface Ethernet0/6
 shutdown
#                                        
interface Ethernet0/7
 shutdown
#
interface Ethernet0/8
 shutdown
#
interface Ethernet0/9
 shutdown
#
interface Ethernet0/10
 shutdown
#
interface Ethernet0/11
 shutdown
#
interface Ethernet0/12
 shutdown
#
interface Ethernet0/13
 shutdown
#
interface Ethernet0/14                   
 shutdown
#
interface Ethernet0/15
 shutdown
#
interface Ethernet0/16
 shutdown
#
interface Ethernet0/17
 shutdown
#
interface Ethernet0/18
 shutdown
#
interface Ethernet0/19
 shutdown
#
interface Ethernet0/20
 shutdown
#
interface Ethernet0/21
 shutdown                                
#
interface Ethernet0/22
 shutdown
#
interface Ethernet0/23
 shutdown
#
与路由器互联接口
interface Ethernet0/24
desc to-router
duplex full                             
 speed 100
 port access vlan  5

#
SNMP网关配置，可以不要
 snmp-agent
 snmp-agent local-engineid 800007DB000FE23F864D6877
 snmp-agent community read  public
 snmp-agent sys-info contact HuaWei_Hotline 4008302118or8008302118
 snmp-agent sys-info location BeiJing China
 snmp-agent sys-info version all
#

设置默认路由
ip route-static 0.0.0.0 0.0.0.0 192.168.8.1

user-interface aux 0

设置TELNET登陆密码
user-interface vty 0 4
 authentication-mode password
 set authentication password cipher  CZP'5O+PV9=FQ!!
#
return

三、二层交换机配置

#
 sysname L1-1
#
#
radius scheme system
 server-type huawei
 primary authentication 127.0.0.1 1645
 primary accounting 127.0.0.1 1646
 user-name-format without-domain

domain system
 radius-scheme system
 access-limit disable
 state active
 idle-cut disable
 self-service-url disable
 messenger time disable

domain default enable system
#
 local-server nas-ip 127.0.0.1 key huawei

#
interface Aux0/0
#
vlan 1
#
vlan 10
#
vlan 20
#

#

interface Ethernet0/1
 port access vlan 10
#
interface Ethernet0/2
port access vlan 10
#
interface Ethernet0/3                    
port access vlan 10
#
interface Ethernet0/4
port access vlan 10
#
interface Ethernet0/5
 port access vlan 10
#
interface Ethernet0/6
port access vlan 10
#
interface Ethernet0/7
 port access vlan 10
#
interface Ethernet0/8
port access vlan 10
#
interface Ethernet0/9
port access vlan 10
#                                        
interface Ethernet0/10
port access vlan 10
#
interface Ethernet0/11
port access vlan 10
#
interface Ethernet0/12
port access vlan 20
#
interface Ethernet0/13
port access vlan 20
#
interface Ethernet0/14
port access vlan 20
#
interface Ethernet0/15
port access vlan 20
#
interface Ethernet0/16
port access vlan 20
#
interface Ethernet0/17                   
port access vlan 20
#
interface Ethernet0/18
port access vlan 20
#
interface Ethernet0/19
port access vlan 20
#
interface Ethernet0/20
port access vlan 20
#
interface Ethernet0/21
port access vlan 20
#
interface Ethernet0/22
port access vlan 20
#
interface Ethernet0/23
 port access vlan 20
#
interface Ethernet0/24
 duplex full
 speed 100
 port link-type trunk
 port trunk permit vlan  10 20
#

user-interface aux 0                     

user-interface vty 0 4

#
return