实验拓扑图如下：
1.某公司网络环境如图，Office1与Office2、Office1与Office3通过PVC链路实现通信，同时总部有另外条用于广域网访问，要求内部通信走帧中继，外网通信走另外一条链路。整体网络规划如图所示，要求依据该规划分配IP。
FR-Switch(config)#frame-relay switching
FR-Switch(config)#int s0/0
FR-Switch(config-if)#encapsulation frame-relay
FR-Switch(config-if)#frame-relay intf-type dce
FR-Switch(config-if)#clock rate 64000
FR-Switch(config-if)#no shut
FR-Switch(config-if)#int s0/1
FR-Switch(config-if)#encapsulation frame-relay
FR-Switch(config-if)#frame-relay intf-type dce
FR-Switch(config-if)#clock rate 64000
FR-Switch(config-if)#no shut
FR-Switch(config-if)#int s0/2
FR-Switch(config-if)#encapsulation frame
FR-Switch(config-if)#encapsulation frame-relay
FR-Switch(config-if)#frame-relay intf-type dce
FR-Switch(config-if)#clock rate 64000
FR-Switch(config-if)#no shut
FR-Switch(config-if)#int s0/0
FR-Switch(config-if)#frame-relay route 103 int s0/2 301
FR-Switch(config-if)#frame-relay route 102 int s0/1 201
FR-Switch(config-if)#int s0/1
FR-Switch(config-if)#frame-relay route 201 int s0/0 102
FR-Switch(config-if)#int s0/2
FR-Switch(config-if)#frame-relay route 301 int s0/0 103
Offiec1(config)#int s0/0
Office1(config-if)#ip add 10.0.0.1 255.255.255.248
Office1(config-if)#no shut
Office1(config-if)#encapsulation frame-relay
Office1(config-if)#no frame-relay inverse-arp
Office1(config-if)#frame-relay map ip 10.0.0.2 102 broadcast
Office1(config-if)#frame-relay map ip 10.0.0.3 103 broadcast
Offiec2(config)#int s0/1
Office2(config-if)#ip add 10.0.0.2 255.255.255.248
Office2(config-if)#no shut
Office2(config)#int l 0
Office2(config-if)#ip add 10.0.3.1 255.255.255.0
Office2(config-if)#encapsulation frame-relay
Office2(config-if)#no frame-relay inverse-arp
Office2(config-if)#frame-relay map ip 10.0.0.1 201 broadcast
Office3(config)#int s0/2
Office3(config-if)#ip add 10.0.0.3 255.255.255.248
Office3(config-if)#no shut
Office2(config)#int l 0
Office2(config-if)#ip add 10.0.3.1 255.255.255.0
Office3(config-if)#encapsulation frame-relay
Office3(config-if)#no frame-relay inverse-arp
Office3(config-if)#frame-relay map ip 10.0.0.1 301 broadcast
在FR-Switch上查看frame-relay route：
FR-Switch#sh frame-relay route
Input Intf Input Dlci Output Intf Output Dlci Status
Serial0/0 102 Serial0/1 201 active
Serial0/0 103 Serial0/2 301 active
Serial0/1 201 Serial0/0 102 active
Serial0/2 301 Serial0/0 103 active
在Office1上pingOffice2、Office3：
Office1#ping 10.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/136/380 ms
Office1#ping 10.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/95/344 ms
Office1#
2.R1与R4之间链路起用PPP协议，并且要求实施基于PAP的单向认证，用户名为User，密码为Pass。Office1上用环回口模拟主机，网段为10.0.1.0/24，要求在R1上采用PAT实现主机能够访问外部服务器。
Internet(config)#int s0/1
Internet(config-if)#ip add 10.0.0.10 255.255.255.252
Internet(config-if)#no shut
Office1(config-if)#int s0/1
Office1(config-if)#ip add 10.0.0.9 255.255.255.252
Office1(config-if)#no shut
Office1(config-if)#encapsulation ppp
Office1(config-if)#ppp pap sent-username user password pass
Internet(config)#int s0/1
Internet(config-if)#encapsulation ppp
Internet(config-if)#ppp authentication pap
Internet(config-if)#exit
Internet(config)#username user password pass
Office1(config)#ip nat pool nat 10.0.0.9 10.0.0.9 netmask 255.255.255.252
Office1(config)#ip nat inside source list 1 pool nat overload
Office1(config)#access-list 1 permit 10.0.1.0 0.0.0.255
Office1(config)#int l 0
Office1(config-if)#ip nat inside
Office1(config-if)#int s0/1
Office1(config-if)#ip nat outside
测试1：
Office1#ping 10.0.0.10 source 10.0.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.10, timeout is 2 seconds:
Packet sent with a source address of 10.0.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/48/132 ms
Office1#
*Mar 1 00:35:48.479: NAT: s=10.0.1.1->10.0.0.9, d=10.0.0.10 [5]
*Mar 1 00:35:48.611: NAT*: s=10.0.0.10, d=10.0.0.9->10.0.1.1 [5]
*Mar 1 00:35:48.615: NAT: s=10.0.1.1->10.0.0.9, d=10.0.0.10 [6]
*Mar 1 00:35:48.619: NAT*: s=10.0.0.10, d=10.0.0.9->10.0.1.1 [6]
*Mar 1 00:35:48.623: NAT: s=10.0.1.1->10.0.0.9, d=10.0.0.10 [7]
*Mar 1 00:35:48.711: NAT*: s=10.0.0.10, d=10.0.0.9->10.0.1.1 [7]
*Mar 1 00:35:48.711: NAT: s=10.0.1.1->10.0.0.9, d=10.0.0.10 [8]
*Mar 1 00:35:48.719: NAT*: s=10.0.0.10, d=10.0.0.9->10.0.1.1 [8]
*Mar 1 00:35:48.723: NAT: s=10.0.1.1->10.0.0.9, d=10.0.0.10 [9]
*Mar 1 00:35:48.727: NAT*: s=10.0.0.10, d=10.0.0.9->10.0.1.1 [9]
测试2：
Office1(config)#ip route 0.0.0.0 0.0.0.0 10.0.0.10
Office1(config)#end
Office1#ping 10.0.2.1 source 10.0.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.2.1, timeout is 2 seconds:
Packet sent with a source address of 10.0.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/45/76 ms
Office1#
*Mar 1 00:38:43.011: NAT: s=10.0.1.1->10.0.0.9, d=10.0.2.1 [15]
*Mar 1 00:38:43.087: NAT*: s=10.0.2.1, d=10.0.0.9->10.0.1.1 [15]
*Mar 1 00:38:43.091: NAT: s=10.0.1.1->10.0.0.9, d=10.0.2.1 [16]
*Mar 1 00:38:43.115: NAT*: s=10.0.2.1, d=10.0.0.9->10.0.1.1 [16]
*Mar 1 00:38:43.119: NAT: s=10.0.1.1->10.0.0.9, d=10.0.2.1 [17]
*Mar 1 00:38:43.171: NAT*: s=10.0.2.1, d=10.0.0.9->10.0.1.1 [17]
*Mar 1 00:38:43.175: NAT: s=10.0.1.1->10.0.0.9, d=10.0.2.1 [18]
*Mar 1 00:38:43.223: NAT*: s=10.0.2.1, d=10.0.0.9->10.0.1.1 [18]
*Mar 1 00:38:43.227: NAT: s=10.0.1.1->10.0.0.9, d=10.0.2.1 [19]
*Mar 1 00:38:43.239: NAT*: s=10.0.2.1, d=10.0.0.9->10.0.1.1 [19]
3.Office1与Offic2通过PVC1，与Office3通过PVC2进行通信，按需求部署相应的帧中继环境，要求关闭Office1、Office2.、Office3的inverse-arp。
详细配置已经在题1中。
4.如图Office1、Office2.、Office3上起ospf协议，帧中继环境为area0，Office1为area1，Office2为area2，Office3为area3。默认网络环境为NBMA，要求实现全网通信，同时Office2也可访问Office3。并且Office2可以通过Office1的局域网出口访问外网，而Office3不行。
实现全网互通，分别启用ospf协议：
Office1(config)#router ospf 1
Office1(config-router)#net 10.0.0.0 0.0.0.255 area 0
Office1(config-router)#net 10.0.1.0 0.0.0.255 area 1
Office1(config-router)#default-information originate ***通告默认路由
Office2(config)#router ospf 2
Office2(config-router)#net 10.0.0.0 0.0.0.255 area 0
Office2(config-router)#net 10.0.3.0 0.0.0.255 area 2
Office3(config)#router ospf 3
Office3(config-router)#net 10.0.0.0 0.0.0.255 area 0
Office3(config-router)#net 10.0.4.0 0.0.0.255 area 3
更改网络类型：
Office1(config)#int s0/0
Office1(config-if)#ip ospf network broadcast
Office2(config)#int s0/1
Office2(config-if)#ip ospf network broadcast
Office3(config)#int s0/2
Office3(config-if)#ip ospf network broadcast
测试全网互通：
Office1#ping 10.0.3.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/57/172 ms
Office1#ping 10.0.4.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.4.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 24/63/140 ms
Office2#ping 10.0.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/46/76 ms
Office3#ping 10.0.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/63/124 ms
实现Office2与Office3的通信：
未配置时：
Office2#ping 10.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Office3#ping 10.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
.....
配置：
Office2(config)#int s0/1
Office2(config-if)#frame-relay map ip 10.0.0.3 201 broadcast
Office3(config)#int s0/2
Office3(config-if)#frame-relay map ip 10.0.0.2 301 broadcast
配置之后：
Office2#ping 10.0.0.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/83/192 ms
Office2#ping 10.0.4.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.4.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/118/240 ms
Office3#ping 10.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/94/228 ms
Office3#ping 10.0.3.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 24/67/188 ms
实现Office2可以通过Office1的局域网出口访问外网，而Office3不行：
未配置时：
Office2#ping 10.0.2.1 source l 0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.2.1, timeout is 2 seconds:
.....
Office3#ping 10.0.2.1 source l 0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.2.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
配置：
Office1(conf ig)#access-list 1 permit 10.0.3.0 0.0.0.255 ***让访问控制列表允许R2访问外网
Office1(config)#int s0/0
Office1(config-if)#ip nat inside
配置之后：
Office2#ping 10.0.2.1 source l 0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.2.1, timeout is 2 seconds:
Packet sent with a source address of 10.0.3.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/64/80 ms
Office3#ping 10.0.2.1 source l 0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.2.1, timeout is 2 seconds:
Packet sent with a source address of 10.0.4.1
.....
Success rate is 0 percent (0/5)
5.将ospf网络环境修改为广播环境，查看相应的路由表，写出修改的配置。
方法一：
Office1(config)#int s0/0
Office1(config-if)#ip ospf network broadcast
Office2(config)#int s0/1
Office2(config-if)#ip ospf network broadcast
Office3(config)#int s0/2
Office3(config-if)#ip ospf network broadcast
方法二：
将Office2和Office3的priority设置成0，成为DROTHER。
Office2(config)#int s0/1
Office3(config-if)#ip ospf priority 0
Office3(config)#int s0/2
Office3(config-if)#ip ospf priority 0
并且指定邻居：
Office1(config-if)#router ospf 1
Office1(config-router)#neigh
Office1(config-router)#neighbor 10.0.0.2
Office1(config-router)#neighbor 10.0.0.3
Office2(config-if)#router ospf 2
Office2(config-router)#neighbor 10.0.0.1
Office3(config-if)#router ospf 3
Office3(config-router)#neighbor 10.0.0.1
6.删除路由器上的ospf进程，重新启用eigrp协议，对于AS号为123。要求实现Office2与Office3之间的通信。
Office1(config)#router eigrp 123
Office1(config-router)#net 10.0.0.0 0.0.0.255
Office1(config-router)#net 10.0.2.0 0.0.0.255
Office1(config-router)#no auto-summary
Office1(config)#int s0/0
Office1(config-if)#no ip split-horizon eigrp 123
Office2(config)#router eigrp 123
Office2(config-router)#net 10.0.0.0 0.0.0.255
Office2(config-router)#no auto-summary
Office3(config)#router eigrp 123
Office3(config-router)#net 10.0.0.0 0.0.0.255
Office3(config-router)#no auto-summary
测试：
Office2#ping 10.0.4.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.4.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/109/180 ms
Office3#ping 10.0.3.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/86/120 ms
自此，完成所有要求。