接上集，现在给出 Internet 设备的配置（学员不用关心，直接做上去即可）：
Internet(config)#username HQ password cisco
Internet(config)#interface s1/0
Internet(config-if)#encapsulation ppp
Internet(config-if)#ip address 202.100.1.254 255.255.255.0
Internet(config-if)#no shutdown
Internet(config-if)#ppp authentication chap
Internet(config)#interface loopback 0
Internet(config-if)#ip address 1.2.3.4 255.255.255.255
Internet(config)#interface e0/1
Internet(config-if)#ip address 61.128.1.254 255.255.255.0
Internet(config-if)#no shutdown
Internet(config)#ip local pool HQ_PPPoE 123.45.67.1
Internet(config)#bba-group pppoe HQ
Internet(config-bba-group)#virtual-template 1
Internet(config-bba-group)#interface e0/0
Internet(config-if)#no shutdown
Internet(config-if)#pppoe enable group HQ
Internet(config-if)#exit
Internet(config)#interface virtual-template 1
Internet(config)#mtu 1492
Internet(config-if)#ip address 123.45.67.254 255.255.255.0
Internet(config-if)#peer default ip address pool HQ_PPPoE
Internet(config-if)#end
Internet#
在R1上做接入互联网
S1/0链路
R1(config)#interface s1/0
R1(config-if)#encapsulation ppp
R1(config-if)#ip add 202.100.1.254 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#ppp chap hostname HQ
R1(config-if)#ppp chap password cisco
R1(config-if)#end
验证：
R1#show ip interface brief s1/0
Interface IP-Address OK? Method Status Protocol
Serial1/0 202.100.1.254 YES manual up up
e0/0链路的PPPoE
R1(config)#interface e0/0
R1(config-if)#no shutdown
R1(config-if)# pppoe enable group global
R1(config-if)# pppoe-client dial-pool-number 1
R1(config-if)#exit
R1(config)#interface Dialer1
R1(config-if)# mtu 1492
R1(config-if)# ip address negotiated
R1(config-if)# encapsulation ppp
R1(config-if)# dialer pool 1
R1(config-if)# dialer-group 1
R1(config-if)# ppp chap hostname HQ
R1(config-if)# ppp chap password cisco
R1(config-if)#End
验证：
R1#show pppoe session
1 client session
Uniq ID PPPoE RemMAC Port VT VA State
SID LocMAC VA-st Type
N/A 1 aabb.cc00.2000 Et0/0 Di1 Vi2 UP
aabb.cc00.1000 UP
R1#show ip interface brief dialer 1
Interface IP-Address OK? Method Status Protocol
Dialer1 123.45.67.1 YES IPCP up up
部署多出口NAT
R1(config)#interface dialer 1
R1(config-if)#ip nat outside
R1(config-if)#interface s1/0
R1(config-if)#ip nat outside
R1(config-if)#interface e0/1
R1(config-if)#ip nat inside
R1(config-if)#interface e0/2
R1(config-if)#ip nat inside
R1(config)#ip access-list standard nat
R1(config-std-nacl)#permit 10.1.0.0 0.0.255.255
R1(config)#route-map PPPoE permit
R1(config-route-map)#match ip address nat
R1(config-route-map)#match interface dialer 1
R1(config)#route-map S1/0 permit
R1(config-route-map)#match ip address nat
R1(config-route-map)#match interface s1/0
R1(config)#ip nat inside source route-map PPPoE interface dialer 1 overload
R1(config)#ip nat inside source route-map S1/0 interface s1/0 overload
验证部署：
R1#show ip nat statistics
Total active translations: 0 (0 static, 0 dynamic; 0 extended)
Peak translations: 0
Outside interfaces:
Serial1/0, Dialer1, Virtual-Access2
Inside interfaces:
Ethernet0/1, Ethernet0/2
Hits: 0 Misses: 0
CEF Translated packets: 0, CEF Punted packets: 0
Expired translations: 0
Dynamic mappings:
-- Inside Source
[Id: 2] route-map PPPoE interface Dialer1 refcount 0
[Id: 3] route-map S1/0 interface Serial1/0 refcount 0
Total doors: 0
Appl doors: 0
Normal doors: 0
Queued Packets: 0
部署浮动静态路由：
R1(config)#ip route 0.0.0.0 0.0.0.0 dialer 1
R1(config)#ip route 0.0.0.0 0.0.0.0 s1/0 5
验证：
R1#show ip route 0.0.0.0 0.0.0.0
Routing entry for 0.0.0.0/0, supernet
Known via "static", distance 1, metric 0 (connected), candidate default path
Routing Descriptor Blocks:
* directly connected, via Dialer1
Route metric is 0, traffic share count is 1
R1(config)#interface dialer 1
R1(config-if)#shutdown
R1(config-if)#
*Oct 23 04:59:13.743: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
*Oct 23 04:59:13.743: Di1 DDR: dialer shutdown complete
*Oct 23 04:59:13.749: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access2, changed state to down
R1(config-if)#
*Oct 23 04:59:13.749: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
R1(config-if)#do show
*Oct 23 04:59:15.747: %LINK-5-CHANGED: Interface Dialer1, changed state to administratively down
R1(config-if)#do show ip route 0.0.0.0
Routing entry for 0.0.0.0/0, supernet
Known via "static", distance 5, metric 0 (connected), candidate default path
Routing Descriptor Blocks:
* directly connected, via Serial1/0
Route metric is 0, traffic share count is 1
验证NAT：
PC1#ping 1.2.3.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/3 ms
PC2#ping 1.2.3.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 3/3/3 ms
R1#show ip nat translations
Pro Inside global Inside local Outside local Outside global
icmp 123.45.67.1:0 10.1.100.1:0 1.2.3.4:0 1.2.3.4:0
icmp 123.45.67.1:1 10.1.101.1:0 1.2.3.4:0 1.2.3.4:1
R1#show ip access-list
Standard IP access list nat
10 permit 10.1.0.0, wildcard bits 0.0.255.255 (2 matches)
至此，总部基础业务部署完毕，接下来开始部署分支机构的业务：
使能交换机的生成树portfast特性：
SW4(config)#spanning-tree portfast default
%Warning: this command enables portfast by default on all interfaces. You
should now disable portfast explicitly on switched ports leading to hubs,
switches and bridges as they may create temporary bridging loops.
划分VLAN
SW4(config)#vlan 100
SW4(config-vlan)#vlan 200
SW4(config-vlan)#exit
Server2(config)#interface e0/0
Server2(config-if)#no shutdown
Server2(config-if)#duplex full
PC3(config)#interface e0/0
PC3(config-if)#duplex full
PC3(config-if)#no shutdown
SW4#show cdp neighbors
*Oct 23 05:12:55.222: %SYS-5-CONFIG_I: Configured from console by console
SW4#show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay
Device ID Local Intrfce Holdtme Capability Platform Port ID
Server2 Eth 0/2 134 R Linux Uni Eth 0/0
PC3 Eth 0/1 139 R Linux Uni Eth 0/0
Total cdp entries displayed : 2
SW4(config)#interface e0/1
SW4(config-if)#switchport mode access
SW4(config-if)#switchport access vlan 100
SW4(config-if)#interface e0/2
SW4(config-if)#switchport mode access
SW4(config-if)#switchport access vlan 200
验证：
SW4#show vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Et0/3
100 VLAN0100 active Et0/1
200 VLAN0200 active Et0/2
部署单臂路由：
SW4
interface Ethernet0/0
switchport trunk encapsulation dot1q
switchport mode trunk
R3(config)#interface e0/0
R3(config-if)#no shutdown
R3(config-if)#interface e0/0.100
R3(config-subif)#encapsulation dot1q 100
R3(config-subif)#ip address 10.2.100.254 255.255.255.0
R3(config-subif)#interface e0/0.200
R3(config-subif)#encapsulation dot1q 200
R3(config-subif)#ip address 10.2.200.254 255.255.255.0
配置与ISP的专线链路：
R3(config)#interface e0/1
R3(config-if)#ip address 61.128.1.1 255.255.255.0
R3(config-if)#no shutdown
R3(config)#ip route 0.0.0.0 0.0.0.0 e0/1 61.128.1.254
验证：
R3#ping 61.128.1.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 61.128.1.254, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms
部署分支机构的NAT
R3(config)#interface e0/1
R3(config-if)#ip nat outside
R3(config-if)#interface e0/0.100
R3(config-subif)#ip nat inside
R3(config-subif)#interface e0/0.200
R3(config-subif)#ip nat inside
R3(config)#ip access-list standard nat
R3(config-std-nacl)#permit 10.2.0.0 0.0.255.255
R3(config-std-nacl)#exit
R3(config)#ip nat inside source list nat interface e0/1 overload
部署总部和分支机构之间的GRE隧道：
R1
interface Tunnel10
ip address 172.16.1.1 255.255.255.0
ip mtu 1400
tunnel source Dialer1
tunnel destination 61.128.1.1
interface Tunnel20
ip address 172.16.2.1 255.255.255.0
ip mtu 1400
tunnel source Serial1/0
tunnel destination 61.128.1.1
R3
interface Tunnel10
ip address 172.16.1.2 255.255.255.0
ip mtu 1400
tunnel source Ethernet0/1
tunnel destination 123.45.67.1
interface Tunnel20
ip address 172.16.2.2 255.255.255.0
ip mtu 1400
tunnel source Ethernet0/1
tunnel destination 202.100.1.1
验证：
R1#ping 172.16.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/2 ms
R1#ping 172.16.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 5/5/6 ms
在总部和分支之间将OSPF部署完成，实现私有网络互联互通
R1(config)#interface tunnel 10
R1(config-if)#ip ospf 110 area 0
R1(config-if)#interface tunnel 20
R1(config-if)#ip ospf 110 area 0
R3(config)#interface tunnel 10
R3(config-if)#ip ospf 110 area 0
R3(config-if)#interface tunnel 20
R3(config-if)#ip ospf 110 area 0
R3(config-if)#interface e0/0.100
R3(config-subif)#ip ospf 110 area 0
R3(config-subif)#interface e0/0.200
R3(config-subif)#ip ospf 110 area 0
R3(config-subif)#router ospf 110
R3(config-router)#passive-interface e0/0.100
R3(config-router)#passive-interface e0/0.200
验证：
R1#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
61.128.1.1 0 FULL/ - 00:00:31 172.16.2.2 Tunnel20
61.128.1.1 0 FULL/ - 00:00:36 172.16.1.2 Tunnel10
10.1.255.22 1 FULL/DR 00:00:30 10.1.12.2 Ethernet0/2
10.1.255.11 1 FULL/BDR 00:00:33 10.1.11.2 Ethernet0/1
R1#show ip route ospf | begin Gateway
Gateway of last resort is 0.0.0.0 to network 0.0.0.0
10.0.0.0/8 is variably subnetted, 11 subnets, 2 masks
O 10.1.100.0/24 [110/11] via 10.1.12.2, 01:20:16, Ethernet0/2
[110/11] via 10.1.11.2, 01:22:19, Ethernet0/1
O 10.1.101.0/24 [110/11] via 10.1.12.2, 01:20:16, Ethernet0/2
[110/11] via 10.1.11.2, 01:22:19, Ethernet0/1
O 10.1.112.0/24 [110/11] via 10.1.12.2, 01:20:16, Ethernet0/2
[110/11] via 10.1.11.2, 01:22:19, Ethernet0/1
O 10.1.200.0/24 [110/11] via 10.1.12.2, 01:20:16, Ethernet0/2
[110/11] via 10.1.11.2, 01:22:19, Ethernet0/1
O 10.2.100.0/24 [110/1010] via 172.16.2.2, 00:03:32, Tunnel20
[110/1010] via 172.16.1.2, 00:03:42, Tunnel10
O 10.2.200.0/24 [110/1010] via 172.16.2.2, 00:03:32, Tunnel20
[110/1010] via 172.16.1.2, 00:03:42, Tunnel10
在总部增加DHCP配置，为分支机构提供DHCP服务：
其中R1为 DHCP Server，R3为 DHCP Relay Agent
为Server2分配固定IP地址 10.2.200.100/24
R1(config)#ip dhcp pool Branch100
R1(dhcp-config)#network 10.2.100.0 /24
R1(dhcp-config)#default-router 10.2.100.254
R1(dhcp-config)#ip dhcp pool Branch200
R1(dhcp-config)#host 10.2.200.100 /24
R1(dhcp-config)#default-router 10.2.200.254
R1(dhcp-config)#client-identifier 01aabb.cc00.c000
R3(config)#interface e0/0.100
R3(config-subif)#ip helper-address 10.1.255.1
R3(config-subif)#interface e0/0.200
R3(config-subif)#ip helper-address 10.1.255.1
PC3(config)#interface e0/0
PC3(config-if)#ip address dhcp
Server2(config)#interface e0/0
Server2(config-if)#ip address dhcp client-id e0/0
*Oct 23 06:00:23.560: %DHCP-6-ADDRESS_ASSIGN: Interface Ethernet0/0 assigned DHCP address 10.2.200.100, mask 255.255.255.0, hostname Server2
测试分支机构与互联网的连通性：
PC3#ping 1.2.3.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
验证NAT：
R3#show ip nat translations
Pro Inside global Inside local Outside local Outside global
icmp 61.128.1.1:0 10.2.100.1:0 1.2.3.4:0 1.2.3.4:0
部署访问控制策略：
R1(config)#ip access-list extended HQ-Branch
R1(config-ext-nacl)#deny ip 10.1.101.0 0.0.0.255 host 10.2.200.100
R1(config-ext-nacl)#permit ip any any
R1(config)#interface e0/1
R1(config-if)#ip access-group HQ-Branch in
R1(config-if)#interface e0/2
R1(config-if)#ip access-group HQ-Branch in
R3(config)#ip access-list extended Branch-HQ
R3(config-ext-nacl)#deny ip 10.2.100.0 0.0.0.255 host 10.1.200.100
R3(config-ext-nacl)#permit tcp 10.2.100.0 0.0.0.255 host 10.1.200.100 eq www
R3(config-ext-nacl)#deny ip 10.2.100.0 0.0.0.255 host 10.1.200.100
R3(config-ext-nacl)#permit ip any any
R3(config)#inter
R3(config)#interface e0/0.100
R3(config-subif)#ip access-group Branch-HQ in
R3(config-subif)#interface e0/0.200
R3(config-subif)#ip access-group Branch-HQ in
开启Server1的WEB服务，以供测试：
Server1(config)#ip http server
测试访问控制策略：
PC1#ping 10.2.200.100
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.200.100, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 2/2/4 ms
PC2#ping 10.2.200.100
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.200.100, timeout is 2 seconds:
U.U.U
Success rate is 0 percent (0/5)
PC3#ping 10.1.200.100
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.200.100, timeout is 2 seconds:
U.U.U
Success rate is 0 percent (0/5)
PC3#telnet 10.1.200.100 80
Trying 10.1.200.100, 80 ... Open
/get
HTTP/1.1 400 Bad Request
Date: Tue, 23 Oct 2018 06:29:47 GMT
Server: cisco-IOS
Accept-Ranges: none
400 Bad Request
[Connection to 10.1.200.100 closed by foreign host]
PC3#
谢谢大家，我是 达叔。 希望能对您的技术进阶之路有所帮助。