实验要求及拓扑图

网段规划以及新建环回如下图:

配置路由器的网关和环回地址

R1

[r1]interface GigabitEthernet 0/0/0
[r1-GigabitEthernet0/0/0]ip address 12.0.0.1 24
[r1-GigabitEthernet0/0/0]q[r1]interface GigabitEthernet 0/0/1
[r1-GigabitEthernet0/0/1]ip address 14.0.0.1 24
[r1-GigabitEthernet0/0/1]q[r1]interface loopback 0
[r1-LoopBack0]ip address 1.1.1.1 24
[r1-LoopBack0]q[r1]interface loopback 1
[r1-LoopBack1]ip address 172.16.1.1 24
[r1-LoopBack1]q[r1]interface loopback 2
[r1-LoopBack2]ip address 172.16.2.1 24
[r1-LoopBack2]q[r1]interface loopback 3
[r1-LoopBack3]ip address 172.16.3.1 24
[r1-LoopBack3]q[r1]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 7
The number of interface that is DOWN in Physical is 1
The number of interface that is UP in Protocol is 7
The number of interface that is DOWN in Protocol is 1Interface                         IP Address/Mask      Physical   Protocol
GigabitEthernet0/0/0              12.0.0.1/24          up         up
GigabitEthernet0/0/1              14.0.0.1/24          up         up
GigabitEthernet0/0/2              unassigned           down       down
LoopBack0                         1.1.1.1/24           up         up(s)
LoopBack1                         172.16.1.1/24        up         up(s)
LoopBack2                         172.16.2.1/24        up         up(s)
LoopBack3                         172.16.3.1/24        up         up(s)
NULL0                             unassigned           up         up(s)

R2

[R2]interface GigabitEthernet 0/0/0
[R2-GigabitEthernet0/0/0]ip address 12.0.0.2 24
[R2-GigabitEthernet0/0/0]q[R2]interface GigabitEthernet 0/0/1
[R2-GigabitEthernet0/0/1]ip address 23.0.0.1 24
[R2-GigabitEthernet0/0/1]q[R2]interface loopback 0
[R2-LoopBack0]ip address 2.2.2.2 24
[R2-LoopBack0]q[r2]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 4
The number of interface that is DOWN in Physical is 1
The number of interface that is UP in Protocol is 4
The number of interface that is DOWN in Protocol is 1Interface                         IP Address/Mask      Physical   Protocol
GigabitEthernet0/0/0              12.0.0.2/24          up         up
GigabitEthernet0/0/1              23.0.0.1/24          up         up
GigabitEthernet0/0/2              unassigned           down       down
LoopBack0                         2.2.2.2/24           up         up(s)
NULL0                             unassigned           up         up(s)

R3

[r3]interface GigabitEthernet 0/0/1
[r3-GigabitEthernet0/0/1]ip address 23.0.0.2 24
[r3-GigabitEthernet0/0/1]q[r3]interface GigabitEthernet 0/0/0
[r3-GigabitEthernet0/0/0]ip address 34.0.0.2 24
[r3-GigabitEthernet0/0/0]q[r3]interface loopback 0
[r3-LoopBack0]ip address 3.3.3.3 24
[r3-LoopBack0]q[r3]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 4
The number of interface that is DOWN in Physical is 1
The number of interface that is UP in Protocol is 4
The number of interface that is DOWN in Protocol is 1Interface                         IP Address/Mask      Physical   Protocol
GigabitEthernet0/0/0              34.0.0.2/24          up         up
GigabitEthernet0/0/1              23.0.0.2/24          up         up
GigabitEthernet0/0/2              unassigned           down       down
LoopBack0                         3.3.3.3/24           up         up(s)
NULL0                             unassigned           up         up(s)

R4

[r4]interface GigabitEthernet 0/0/0
[r4-GigabitEthernet0/0/0]ip address 14.0.0.2 24
[r4-GigabitEthernet0/0/0]q[r4]interface GigabitEthernet 0/0/1
[r4-GigabitEthernet0/0/1]ip address 34.0.0.1 24
[r4-GigabitEthernet0/0/1]q[r4]interface GigabitEthernet 0/0/2
[r4-GigabitEthernet0/0/2]ip address 45.0.0.1 24
[r4-GigabitEthernet0/0/2]q[r4]interface GigabitEthernet 4/0/0
[r4-GigabitEthernet4/0/0]ip address 46.0.0.1 24
[r4-GigabitEthernet4/0/0]q[r4]interface loopback 0
[r4-LoopBack0]ip address 4.4.4.4 24
[r4-LoopBack0]q[r4]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 6
The number of interface that is DOWN in Physical is 0
The number of interface that is UP in Protocol is 6
The number of interface that is DOWN in Protocol is 0Interface                         IP Address/Mask      Physical   Protocol
GigabitEthernet0/0/0              14.0.0.2/24          up         up
GigabitEthernet0/0/1              34.0.0.1/24          up         up
GigabitEthernet0/0/2              45.0.0.1/24          up         up
GigabitEthernet4/0/0              46.0.0.1/24          up         up
LoopBack0                         4.4.4.4/24           up         up(s)
NULL0                             unassigned           up         up(s)

R5

[r5]interface GigabitEthernet 0/0/0
[r5-GigabitEthernet0/0/0]ip address 45.0.0.2 24
[r5-GigabitEthernet0/0/0]q[r5]interface loopback 0
[r5-LoopBack0]ip address 5.5.5.5 24
[r5-LoopBack0]q[r5]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 3
The number of interface that is DOWN in Physical is 2
The number of interface that is UP in Protocol is 3
The number of interface that is DOWN in Protocol is 2Interface                         IP Address/Mask      Physical   Protocol
GigabitEthernet0/0/0              45.0.0.2/24          up         up
GigabitEthernet0/0/1              unassigned           down       down
GigabitEthernet0/0/2              unassigned           down       down
LoopBack0                         5.5.5.5/24           up         up(s)
NULL0                             unassigned           up         up(s)

R6

[r6]interface GigabitEthernet 0/0/0
[r6-GigabitEthernet0/0/0]ip address 46.0.0.2 24
[r6-GigabitEthernet0/0/0]q[r6]interface GigabitEthernet 0/0/1
[r6-GigabitEthernet0/0/1]ip address 67.0.0.1 24
[r6-GigabitEthernet0/0/1]q[r6]interface loopback 0
[r6-LoopBack0]ip address 6.6.6.6 24
[r6-LoopBack0]q[r6]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 4
The number of interface that is DOWN in Physical is 1
The number of interface that is UP in Protocol is 4
The number of interface that is DOWN in Protocol is 1Interface                         IP Address/Mask      Physical   Protocol
GigabitEthernet0/0/0              46.0.0.2/24          up         up
GigabitEthernet0/0/1              67.0.0.1/24          up         up
GigabitEthernet0/0/2              unassigned           down       down
LoopBack0                         6.6.6.6/24           up         up(s)
NULL0                             unassigned           up         up(s)

R7

[r7]interface GigabitEthernet 0/0/0
[r7-GigabitEthernet0/0/0]ip address 67.0.0.2 24
[r7-GigabitEthernet0/0/0]q[r7]interface loopback 0
[r7-LoopBack0]ip address 7.7.7.7 24
[r7-LoopBack0]q[r7]display ip interface brief
*down: administratively down
^down: standby
(l): loopback
(s): spoofing
The number of interface that is UP in Physical is 3
The number of interface that is DOWN in Physical is 2
The number of interface that is UP in Protocol is 3
The number of interface that is DOWN in Protocol is 2Interface                         IP Address/Mask      Physical   Protocol
GigabitEthernet0/0/0              67.0.0.2/24          up         up
GigabitEthernet0/0/1              unassigned           down       down
GigabitEthernet0/0/2              unassigned           down       down
LoopBack0                         7.7.7.7/24           up         up(s)
NULL0                             unassigned           up         up(s)

选择RIP版本并宣告

R1

[r1]rip
[r1-rip-1]version 2
[r1-rip-1]network 1.0.0.0
[r1-rip-1]network 172.16.0.0
[r1-rip-1]network 12.0.0.0
[r1-rip-1]network 14.0.0.0
[r1-rip-1]q

R2

[r2]rip
[r2-rip-1]version 2
[r2-rip-1]network 12.0.0.0
[r2-rip-1]network 23.0.0.0
[r2-rip-1]network 2.0.0.0
[r2-rip-1]q

R3

[r3]rip
[r3-rip-1]version 2
[r3-rip-1]network 23.0.0.0
[r3-rip-1]network 34.0.0.0
[r3-rip-1]network 3.0.0.0
[r3-rip-1]q

R4

[r4]rip
[r4-rip-1]version 2
[r4-rip-1]network 14.0.0.0
[r4-rip-1]network 34.0.0.0
[r4-rip-1]network 46.0.0.0
[r4-rip-1]network 4.0.0.0
[r4-rip-1]network 45.0.0.0
[r4-rip-1]q

R5

[r5]rip
[r5-rip-1]version 2
[r5-rip-1]network 45.0.0.0
[r5-rip-1]q

R6

[r6]rip
[r6-rip-1]version 1
[r6-rip-1]network 46.0.0.0
[r6-rip-1]network 67.0.0.0
[r6-rip-1]network 6.0.0.0
[r6-rip-1]q

R7

[r7]rip
[r7-rip-1]version 1
[r7-rip-1]network 67.0.0.0
[r7-rip-1]network 7.0.0.0
[r7-rip-1]q

减少路由条目数量

[r1]interface GigabitEthernet 0/0/0
[r1-GigabitEthernet0/0/0]rip summary-address 172.16.0.0 255.255.252.0
[r1-GigabitEthernet0/0/0]q[r1]interface GigabitEthernet 0/0/1
[r1-GigabitEthernet0/0/1]rip summary-address 172.16.0.0 255.255.252.0
[r1-GigabitEthernet0/0/1]q

实现R3使用R2访问R1环回

通过ACL抓取流量,增加开销值

[r3]acl 2000
[r3-acl-basic-2000]rule permit source 172.16.0.0 0
[r3-acl-basic-2000]rule permit source 1.1.1.0 0
[r3-acl-basic-2000]q[r3]interface GigabitEthernet 0/0/0
[r3-GigabitEthernet0/0/1]rip metricin 2000 10

增加路由传递安全性

手工认证

[r1]interface GigabitEthernet 0/0/0
[r1-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456
[r1-GigabitEthernet0/0/0]q
[r1]interface GigabitEthernet 0/0/1
[r1-GigabitEthernet0/0/1]rip authentication-mode md5 usual cipher 123456[r2]interface GigabitEthernet 0/0/0
[r2-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456
[r2-GigabitEthernet0/0/0]
[r2-GigabitEthernet0/0/0]interface GigabitEthernet 0/0/1
[r2-GigabitEthernet0/0/1]rip authentication-mode md5 usual cipher 123456[r3]interface GigabitEthernet 0/0/1
[r3-GigabitEthernet0/0/1]rip authentication-mode md5 usual cipher 123456
[r3-GigabitEthernet0/0/1]q
[r3]interface GigabitEthernet 0/0/0
[r3-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456[r4]interface GigabitEthernet 0/0/0
[r4-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456
[r4-GigabitEthernet0/0/0]q
[r4]interface GigabitEthernet 0/0/1
[r4-GigabitEthernet0/0/1]rip authentication-mode md5 usual cipher 123456
[r4-GigabitEthernet0/0/1]q
[r4]interface GigabitEthernet 0/0/2
[r4-GigabitEthernet0/0/2]rip authentication-mode md5 usual cipher 123456
[r4-GigabitEthernet0/0/2]q
[r4]interface GigabitEthernet 4/0/0
[r4-GigabitEthernet4/0/0]rip authentication-mode md5 usual cipher 123456
[r4-GigabitEthernet4/0/0]q[r5]interface GigabitEthernet 0/0/0
[r5-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456
[r5-GigabitEthernet0/0/0]q[r6]interface GigabitEthernet 0/0/0
[r6-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456
[r6-GigabitEthernet0/0/0]q
[r6]interface GigabitEthernet 0/0/1
[r6-GigabitEthernet0/0/1]rip authentication-mode md5 usual cipher 123456
[r6-GigabitEthernet0/0/1]q[r7]interface GigabitEthernet 0/0/0
[r7-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456

R5创建一个环回模拟运营商,不能宣告

R4配置缺省路由并下发缺省

[r4]ip route-static 0.0.0.0 0 45.0.0.2
[r4]rip
[r4-rip-1]default-route originate

实现全网可达

修改R6 0/0/0接口的RIP版本

[r6]interface GigabitEthernet 0/0/0
[r6-GigabitEthernet0/0/0]rip version 2

简单测试

<r1>ping 6.6.6.6PING 6.6.6.6: 56  data bytes, press CTRL_C to breakRequest time outReply from 6.6.6.6: bytes=56 Sequence=2 ttl=254 time=70 msReply from 6.6.6.6: bytes=56 Sequence=3 ttl=254 time=30 msReply from 6.6.6.6: bytes=56 Sequence=4 ttl=254 time=30 msReply from 6.6.6.6: bytes=56 Sequence=5 ttl=254 time=30 ms

实现R1 telnet_R2环回实际telnet到R7上

在R7上开启Telnet服务和端口

[r7]aaa
[r7-aaa]local-user admin privilege level 15 password cipher 123456
[r7-aaa]local-user admin service-type telnet
[r7-aaa]q[r7]user-interface vty 0 4
[r7-ui-vty0-4]authentication-mode aaa
[r7-ui-vty0-4]q

R2设置端口映射

[r2]interface GigabitEthernet 0/0/0
[r2-GigabitEthernet0/0/0]nat server protocol tcp global interface loopback 0 23
inside 7.7.7.7 23
Warning:The port 23 is well-known port. If you continue it may cause function fa
ilure.
Are you sure to continue?[Y/N]:y
[r2-GigabitEthernet0/0/0]q[r2]acl 2000
[r2-acl-basic-2000]rule permit source 7.0.0.0 0
[r2-acl-basic-2000]q[r2]interface GigabitEthernet 0/0/0
[r2-GigabitEthernet0/0/0]rip metricin 2000 5
[r2-GigabitEthernet0/0/0]q

把AR4的0/0/0口增大COST值,使得数据只能从AR2的0/0/0出去

[r4]acl 2000
[r4-acl-basic-2000]rule permit source 12.0.0.0 0
[r4-acl-basic-2000]q[r4]interface GigabitEthernet 0/0/0
[r4-GigabitEthernet0/0/0]rip metricin 2000 10
[r4-GigabitEthernet0/0/0]q

测试

<r1>telnet 2.2.2.2Press CTRL_] to quit telnet modeTrying 2.2.2.2 ...Connected to 2.2.2.2 ...Login authenticationUsername:admin
Password:----------------------------------------------------------------------------- User last login information:     -----------------------------------------------------------------------------Access Type: Telnet      IP-Address : 12.0.0.1     Time       : 2021-09-24 19:10:12-08:00     -----------------------------------------------------------------------------
<r7>

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