按照如图分配网段，划分合理的IP地址：
?
- 配置IP：（例如r2）
[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]ip add
[r2-GigabitEthernet0/0/0]ip address 12.0.0.2 24
Jan ?7 2022 21:07:34-08:00 r2 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
on the interface GigabitEthernet0/0/0 has entered the UP state.
[r2-GigabitEthernet0/0/0]int g 0/0/1
[r2-GigabitEthernet0/0/1]ip add
[r2-GigabitEthernet0/0/1]ip address 23.0.0.1 24
Jan ?7 2022 21:07:44-08:00 r2 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP
on the interface GigabitEthernet0/0/1 has entered the UP state.
[r2-GigabitEthernet0/0/1]int l0
[r2-LoopBack0]ip add
[r2-LoopBack0]ip address 2.2.2.2 24——环回配置IP
检查配置是否正确：
<r2>ping 12.0.0.1
??PING 12.0.0.1: 56 ?data bytes, press CTRL_C to break
????Reply from 12.0.0.1: bytes=56 Sequence=1 ttl=255 time=50 ms
????Reply from 12.0.0.1: bytes=56 Sequence=2 ttl=255 time=20 ms
????Reply from 12.0.0.1: bytes=56 Sequence=3 ttl=255 time=10 ms
????Reply from 12.0.0.1: bytes=56 Sequence=4 ttl=255 time=20 ms
????Reply from 12.0.0.1: bytes=56 Sequence=5 ttl=255 time=20 ms
??--- 12.0.0.1 ping statistics ---
????5 packet(s) transmitted
????5 packet(s) received
????0.00% packet loss
????round-trip min/avg/max = 10/24/50 ms
- rip宣告：
[r2]rip
[r2-rip-1]v 2
[r2-rip-1]net
[r2-rip-1]network 2.0.0.0
[r2-rip-1]net
[r2-rip-1]network 12.0.0.0
[r2-rip-1]net
[r2-rip-1]network 23.0.0.0
- 修改cost值;
[r3]int g 0/0/1
[r3-GigabitEthernet0/0/1]rip m
[r3-GigabitEthernet0/0/1]rip metricin 2000 10
- 做汇总，减少路由条目
interface GigabitEthernet0/0/1
?rip summary-address 172.16.0.0 255.255.252.0
- 做缺省
[r5]rip
[r5-rip-1]de
[r5-rip-1]default-route
[r5-rip-1]
[r5-rip-1]default-route or
[r5-rip-1]default-route originate?
- 做过滤：
[r6]acl 2000
[r6-acl-basic-2000]ru
[r6-acl-basic-2000]rule p
[r6-acl-basic-2000]rule d
[r6-acl-basic-2000]rule deny s
[r6-acl-basic-2000]rule deny source 172.16.0.0 0
[r6-acl-basic-2000]ru
[r6-acl-basic-2000]rule s
[r6-acl-basic-2000]rule d
[r6-acl-basic-2000]rule deny s
[r6-acl-basic-2000]rule deny source 1.1.1.0 0
[r6-acl-basic-2000]ru
[r6-acl-basic-2000]rule p
[r6-acl-basic-2000]rule permit s
[r6-acl-basic-2000]rule permit source a
[r6-acl-basic-2000]rule permit source any?
[r6]rip 1
[r6-rip-1]fi
[r6-rip-1]filter-policy 2000 im
[r6-rip-1]filter-policy 2000 import
- 端口映射
[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]rip a
[r2-GigabitEthernet0/0/0]rip authentication-mode md5 u
[r2-GigabitEthernet0/0/0]rip authentication-mode md5 usual c
[r2-GigabitEthernet0/0/0]rip authentication-mode md5 usual cipher 123456
[r2-GigabitEthernet0/0/0]
??Please check whether system data has been changed, and save data in time
??Configuration console time out, please press any key to log on
[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]nat s
[r2-GigabitEthernet0/0/0]nat server p
[r2-GigabitEthernet0/0/0]nat server protocol ?tcp g
[r2-GigabitEthernet0/0/0]nat server protocol ?tcp global in
[r2-GigabitEthernet0/0/0]nat server protocol ?tcp global interface ?l
[r2-GigabitEthernet0/0/0]nat server protocol ?tcp global interface ?loopback ?0
[r2-GigabitEthernet0/0/0]nat server protocol tcp global interface loopback 0 23
in
[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
试登录：
<r1>telnet 2.2.2.2
??Press CTRL_] to quit telnet mode
??Trying 2.2.2.2 ...
??Connected to 2.2.2.2 ...
Login authentication
Username:
??Username timeout expired
Username:xian
Password:
??-----------------------------------------------------------------------------
????
??User last login information: ????
??-----------------------------------------------------------------------------
??Access Type: Telnet ?????
??IP-Address : 12.0.0.1 ????
??Time ??????: 2022-01-07 22:06:04-08:00 ????
??-----------------------------------------------------------------------------
<r7>
- 验证实验结果
<r2>ping 7.7.7.7
??PING 7.7.7.7: 56 ?data bytes, press CTRL_C to break
????Reply from 7.7.7.7: bytes=56 Sequence=1 ttl=252 time=50 ms
????Reply from 7.7.7.7: bytes=56 Sequence=2 ttl=252 time=50 ms
????Reply from 7.7.7.7: bytes=56 Sequence=3 ttl=252 time=50 ms
????Reply from 7.7.7.7: bytes=56 Sequence=4 ttl=252 time=40 ms
????Reply from 7.7.7.7: bytes=56 Sequence=5 ttl=252 time=40 ms
??--- 7.7.7.7 ping statistics ---
????5 packet(s) transmitted
????5 packet(s) received
????0.00% packet loss
????round-trip min/avg/max = 40/46/50 ms
<r2>ping 46.0.0.1
??PING 46.0.0.1: 56 ?data bytes, press CTRL_C to break
????Reply from 46.0.0.1: bytes=56 Sequence=1 ttl=254 time=20 ms
????Reply from 46.0.0.1: bytes=56 Sequence=2 ttl=254 time=30 ms
????Reply from 46.0.0.1: bytes=56 Sequence=3 ttl=254 time=30 ms
????Reply from 46.0.0.1: bytes=56 Sequence=4 ttl=254 time=30 ms
????Reply from 46.0.0.1: bytes=56 Sequence=5 ttl=254 time=40 ms
??--- 46.0.0.1 ping statistics ---
????5 packet(s) transmitted
????5 packet(s) received
????0.00% packet loss
????round-trip min/avg/max = 20/30/40 ms
<r2>ping 5.5.5.5
??PING 5.5.5.5: 56 ?data bytes, press CTRL_C to break
????Reply from 5.5.5.5: bytes=56 Sequence=1 ttl=253 time=30 ms
????Reply from 5.5.5.5: bytes=56 Sequence=2 ttl=253 time=30 ms
????Reply from 5.5.5.5: bytes=56 Sequence=3 ttl=253 time=30 ms
????Reply from 5.5.5.5: bytes=56 Sequence=4 ttl=253 time=30 ms
????Reply from 5.5.5.5: bytes=56 Sequence=5 ttl=253 time=40 ms
??--- 5.5.5.5 ping statistics ---
????5 packet(s) transmitted
????5 packet(s) received
????0.00% packet loss
????round-trip min/avg/max = 30/32/40 ms
实验完成。