11.3-将企业路由器配置成家用路由器

企业路由器R1配置：

1.开启DHCP

# 配置DHCP地址池
[R1]ip pool 1
[R1-ip-pool-1]network 192.168.1.0 mask 24	
[R1-ip-pool-1]gateway-list 192.168.1.1
[R1-ip-pool-1]dns-list 8.8.8.8
# 开启DHCP
[R1]dhcp enable
# 配置内网接口地址及DHCP
[R1]int g0/0/0
[R1-GigabitEthernet0/0/0]ip add 192.168.1.1 24	
[R1-GigabitEthernet0/0/0]dhcp select global 
[R1-GigabitEthernet0/0/0]qu
[R1]

配置完成后，此时内网主机，就可以通过DHCP获取IP地址，并且能够ping通网关

2.配置PPPoE拨号

用户名：020 密码：123456

[R1]int Dialer 1
[R1-Dialer1]link-protocol ppp
[R1-Dialer1]ip add ppp-negotiate 
[R1-Dialer1]ppp pap local-user 020 password simple 123456
[R1-Dialer1]dialer user 020
[R1-Dialer1]dialer bundle 2
[R1-Dialer1]qu
[R1]int g0/0/1	
[R1-GigabitEthernet0/0/1]pppoe-client dial-bundle-number 2
[R1-GigabitEthernet0/0/1]

3.配置NAT和缺省路由

[R1]acl 2001
[R1-acl-basic-2001]rule permit source 192.168.1.0 0.0.0.255	
[R1-acl-basic-2001]qu
[R1]int Dialer 1
[R1-Dialer1]nat outbound 2001
 Info: The NAT address pool is empty 
[R1-Dialer1]qu	
[R1]ip route-s 0.0.0.0 0 Dialer 1
[R1]

进入到外网接口g0/0/1重启一下端口，此时可以发现dialer1已经通过pppoe拨号成功，并且获取到IP地址

此时内网主机ping服务器9.9.9.9已经可以ping通了

PC>ping 9.9.9.9

Ping 9.9.9.9: 32 data bytes, Press Ctrl_C to break
Request timeout!
From 9.9.9.9: bytes=32 seq=2 ttl=253 time=31 ms
From 9.9.9.9: bytes=32 seq=3 ttl=253 time=47 ms
From 9.9.9.9: bytes=32 seq=4 ttl=253 time=47 ms
From 9.9.9.9: bytes=32 seq=5 ttl=253 time=15 ms

--- 9.9.9.9 ping statistics ---
  5 packet(s) transmitted
  4 packet(s) received
  20.00% packet loss
  round-trip min/avg/max = 0/35/47 ms

PC>

优化配置

由于原始以太网报文在传输过程中增加了PPPoE（6字节）和PPP（2字节）的包头，为了使得传输的数据在传输过程中不分片（提高传输效率），建议在dialer1口更改数据封装的MTU值。

[R1]int Dialer 1
[R1-Dialer1]MTU 1492
[R1-Dialer1]

以太网接口默认1500字节，现在修改为1492字节。

*服务端配置，一般不需要我们配置，由运营商提供PPPoE账号密码即可

[R2]ip pool 1	
[R2-ip-pool-1]network 202.1.1.0 mask 24
[R2-ip-pool-1]gateway-list 202.1.1.2
[R2-ip-pool-1]dns-list 9.9.9.9
[R2-ip-pool-1]qu
[R2]aaa
[R2-aaa]local-user 020 password cipher 123456	
[R2-aaa]local-user 020 service-type ppp
[R2]int Virtual-Template 1
[R2-Virtual-Template1]ppp authentication-mode pap
[R2-Virtual-Template1]remote add pool 1
[R2-Virtual-Template1]ip add 202.1.1.2 24
[R2-GigabitEthernet0/0/0]pppoe-server bind virtual-template 1
[R2]int g0/0/1
[R2-GigabitEthernet0/0/1]ip add 9.9.9.1 24 #服务器9.9.9.9网关

配置示例工程文件下载地址：
https://download.csdn.net/download/i12344/85290377