HCIP第三次作业

一、拓扑图

二、需求

1、R5为ISP，其上只能配置IP地址；R5与其他所有直连设备间均使用公有IP；环回地址为100.1.1.1/32；
2、R4设备为企业出口路由器；
3、整个0SPF环境IP基于172.16.0.0/16划分；
4、所有设备均可访问R5的环回；
5、减少LSA的更新里，加快收敛，保障更新安全；
6、全网可达。

三、需求分析

1、ISP设备（R5）配置需求：

• R5作为ISP设备，需要配置特定的IP地址，并与其他直连设备使用公网IP进行通信。
• R5需要配置一个环回地址，用于内部网络管理和测试。

2、企业出口路由器（R4）配置需求：

• R4作为企业出口路由器，需要配置OSPF环境，基于172.16.0.0/16的IP地址范围进行划分。
• 确保所有设备都能够访问R5的环回地址。

3、网络优化需求：

• 需要减少LSA（链路状态广告）的更新量，以加快网络收敛速度。
• 保障网络更新的安全性，确保全网可达。

四、所有配置的文字描述及代码

 配置IP并进行ospf宣告

#r1
[r1]int g 0/0/0
[r1-GigabitEthernet0/0/0]ip address  172.16.35.1 29
[r1-GigabitEthernet0/0/0]int l 0
[r1-LoopBack0]ip add	
[r1-LoopBack0]ip address 172.16.32.1 24	
[r1-LoopBack0]ospf network-type broadcast#r2
[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]ip address 172.16.35.2 29
[r2-GigabitEthernet0/0/0]int l 0
[r2-LoopBack0]ip address 172.16.33.1 24
[r2-LoopBack0]ospf network-type broadcast#r3
[r3]int g 0/0/0
[r3-GigabitEthernet0/0/0]ip address 172.16.35.3 29
[r3-GigabitEthernet0/0/0]int g 0/0/1
[r3-GigabitEthernet0/0/1]ip address 172.16.0.1 30
Apr 23 2025 12:47:03-08:00 r3 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP 
on the interface GigabitEthernet0/0/1 has entered the UP state. 
[r3-GigabitEthernet0/0/1]int l 0
[r3-LoopBack0]ip address 172.16.34.1 24	
[r3-LoopBack0]ospf network-type broadcast#r4
[r4]int g 0/0/0
[r4-GigabitEthernet0/0/0]ip address 172.16.0.9 30
[r4-GigabitEthernet0/0/0]int g 0/0/1
[r4-GigabitEthernet0/0/1]ip address 172.16.0.2 30
[r4-GigabitEthernet0/0/1]int g 0/0/2
[r4-GigabitEthernet0/0/2]ip address 172.16.0.5 30
[r4-GigabitEthernet0/0/2]int s 4/0/1
[r4-Serial4/0/1]ip address 45.0.0.1 30#ISP
[ISP]int s 4/0/0
[ISP-Serial4/0/0]ip add 45.0.0.2 30
[ISP-Serial4/0/0]int l 0
[ISP-LoopBack0]ip add 100.1.1.1 32#r6
r6]int g 0/0/0
[r6-GigabitEthernet0/0/0]ip add 172.16.66.1 30
[r6-GigabitEthernet0/0/0]int g 0/0/1
[r6-GigabitEthernet0/0/1]ip add 172.16.0.6 30
[r6-GigabitEthernet0/0/1]int l 0
[r6-LoopBack0]ip add 172.16.64.1 24
[r6-LoopBack0]ospf network-type broadcast #r7
[r7]int g 0/0/0
[r7-GigabitEthernet0/0/0]ip add 172.16.0.10 30
[r7-GigabitEthernet0/0/0]int g 0/0/1
[r7-GigabitEthernet0/0/1]ip add 172.16.98.1 30
[r7-GigabitEthernet0/0/1]int l 0
[r7-LoopBack0]ip add 172.16.96.1 24
[r7-LoopBack0]ospf network-type  broadcast#r8
[r8]int g 0/0/0
[r8-GigabitEthernet0/0/0]ip address 172.16.98.2 30
[r8-GigabitEthernet0/0/0]int g 0/0/1
[r8-GigabitEthernet0/0/1]ip ad 172.16.98.5 30
[r8-GigabitEthernet0/0/1]int l 0
[r8-LoopBack0]ip ad 172.16.97.1 24#r9
[r9]int g 0/0/0
[r9-GigabitEthernet0/0/0]ip add 172.16.98.6 30
[r9-GigabitEthernet0/0/0]int g 0/0/1
[r9-GigabitEthernet0/0/1]ip add 172.16.130.1 30
[r9-GigabitEthernet0/0/1]int l 0
[r9-LoopBack0]ip add 172.16.128.1 24
[r9-LoopBack0]ospf network-type broadcast#r10
[r10]int g 0/0/0
[r10-GigabitEthernet0/0/0]ip add 172.16.130.2 30
[r10-GigabitEthernet0/0/0]int l 0
[r10-LoopBack0]ip add 172.16.129.1 24
[r10-LoopBack0]ospf network-type broadcast#r11
[r11]int g 0/0/0
[r11-GigabitEthernet0/0/0]ip add 172.16.66.2 30
[r11-GigabitEthernet0/0/0]int g 0/0/1
[r11-GigabitEthernet0/0/1]ip add 172.16.66.5 30
[r11-GigabitEthernet0/0/1]int l 0
[r11-LoopBack0]ip add 172.16.65.1 24
[r11-LoopBack0]ospf network-type broadcast #r12
[r12]int g 0/0/0
[r12-GigabitEthernet0/0/0]ip add 172.16.66.6 30
[r12-GigabitEthernet0/0/0]int l 0
[r12-LoopBack0]ip add 10.1.1.1 24
[r12-LoopBack0]int l 1
[r12-LoopBack1]ip add 10.1.2.1 24

OSPF配置

由于area 4 是远离骨干的特殊区域所以不能直接进行宣告，且由于area 3需要进行优化，所以让R9成为ASBR设备进行双向重发布

#r1
r1]ospf 1 router-id 1.1.1.1
[r1-ospf-1]a 1
[r1-ospf-1-area-0.0.0.1]network 172.16.32.1 0.0.0.0
[r1-ospf-1-area-0.0.0.1]network 172.16.35.1 0.0.0.0#r2
[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]a 1
[r2-ospf-1-area-0.0.0.1]network 172.16.33.1 0.0.0.0
[r2-ospf-1-area-0.0.0.1]network 172.16.35.2 0.0.0.0#r3
[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]a 1
[r3-ospf-1-area-0.0.0.1]network 172.16.35.3 0.0.0.0
r3-ospf-1-area-0.0.0.1]network 172.16.34.1 0.0.0.0
[r3-ospf-1]a 0
[r3-ospf-1-area-0.0.0.0]network 172.16.0.1 0.0.0.0#r4
[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]a 0
[r4-ospf-1-area-0.0.0.0]network 172.16.0.2 0.0.0.0
[r4-ospf-1-area-0.0.0.0]network 172.16.0.5 0.0.0.0
[r4-ospf-1-area-0.0.0.0]network 172.16.0.9 0.0.0.0#r6
[r6]ospf 1 router-id 6.6.6.6
[r6-ospf-1]a 0
[r6-ospf-1-area-0.0.0.0]network 172.16.0.6 0.0.0.0
[r6-ospf-1] a 2
[r6-ospf-1-area-0.0.0.2]network 172.16.66.1 0.0.0.0
[r6-ospf-1-area-0.0.0.2]network 172.16.64.1 0.0.0.0#r7
[r7]ospf 1 router-id 7.7.7.7
[r7-ospf-1]a 0
[r7-ospf-1-area-0.0.0.0]network 172.16.0.10 0.0.0.0
[r7-ospf-1-area-0.0.0.0]q
[r7-ospf-1]a 3
[r7-ospf-1-area-0.0.0.3]network 172.16.96.1 0.0.0.0
[r7-ospf-1-area-0.0.0.3]network 172.16.98.1 0.0.0.0#r8
[r8]ospf 1 router-id 8.8.8.8
[r8-ospf-1]a 3
[r9-ospf-1-area-0.0.0.3]network 172.16.98.2 0.0.0.0
[r8-ospf-1-area-0.0.0.3]network 172.16.97.1 0.0.0.0
[r8-ospf-1-area-0.0.0.3]network 172.16.98.5 0.0.0.0#r9
[r9]ospf 1 r	
[r9]ospf 1 router-id 9.9.9.9
[r9-ospf-1]a 3
[r9-ospf-1-area-0.0.0.3]network 172.16.98.6 0.0.0.0
r9]ospf 2 r	
[r9]ospf 2 router-id 9.9.9.9
[r9-ospf-2]a 4
[r9-ospf-2-area-0.0.0.4]network 172.16.128.1 0.0.0.0
[r9-ospf-2-area-0.0.0.4]network 172.16.130.1 0.0.0.0#r10
[r10]ospf 1 router-id 10.10.10.10
[r10-ospf-1]a 4
[r10-ospf-1-area-0.0.0.4]network 172.16.129.1 0.0.0.0
[r10-ospf-1-area-0.0.0.4]network 172.16.130.2 0.0.0.0#r11
r11]ospf 1 router-id 11.11.11.11
[r11-ospf-1]a 2
[r11-ospf-1-area-0.0.0.2]network 172.16.65.1 0.0.0.0
[r11-ospf-1-area-0.0.0.2]network 172.16.66.5 0.0.0.0
[r11-ospf-1-area-0.0.0.2]network 172.16.66.2 0.0.0.0#r12
[r12]ospf 1 router-id 12.12.12.12
[r12-ospf-1]a 2
[r12-ospf-1-area-0.0.0.2]network 172.16.66.6 0.0.0.0
[r12]rip 1
[r12-rip-1]ver 2
[r12-rip-1]network 10.0.0.0

进行双向重发布

#r9
[r9]ospf 1
[r9-ospf-1]import-route  ospf 2
[r9-ospf-1]q
[r9]ospf 2
[r9-ospf-2]import-route ospf 1#r12
[r12]ospf 1
[r12-ospf-1]import-route rip 1

路由汇总

#r3
[r3]ospf 1
[r3-ospf-1]a 1
[r3-ospf-1-area-0.0.0.1]abr-su	
[r3-ospf-1-area-0.0.0.1]abr-summary 172.16.32.0 255.255.224.0#r6
[r6]ospf 1
[r6-ospf-1]a 2
[r6-ospf-1-area-0.0.0.2]abr	
[r6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0#r7 
[r7]ospf 1
[r7-ospf-1]a 3
[r7-ospf-1-area-0.0.0.3]abr	
[r7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.224.0#r9 
[r9]ospf 1
[r9-ospf-1]asb	
[r9-ospf-1]asbr-summary 172.16.128.0 255.255.224.0#r12 
[r12]ospf 1
[r12-ospf-1]asb	
[r12-ospf-1]asbr-summary 10.1.0.0 255.255.252.0

特殊区域

#r1
[r1]ospf 1
[r1-ospf-1]a 1
[r1-ospf-1-area-0.0.0.1]stub#r2 
[r2]ospf 1
[r2-ospf-1]a 1
[r2-ospf-1-area-0.0.0.1]stub#r3
[r3-ospf-1]a 1
[r3-ospf-1-area-0.0.0.1]stub no-summary#r6
[r6-ospf-1]a 2
[r6-ospf-1-area-0.0.0.2]nssa no-summary#r7 
[r7]ospf 1
[r7-ospf-1]a 3
[r7-ospf-1-area-0.0.0.3]nssa no-summary #r8 
[r8]ospf 1
[r8-ospf-1]a 3
[r8-ospf-1-area-0.0.0.3]nssa#r9 
[r9]ospf 1
[r9-ospf-1]a 3
[r9-ospf-1-area-0.0.0.3]nssa
r9-ospf-1]ospf 2
[r9-ospf-2]default-route-advertise#r11
[r11]ospf 1
[r11-ospf-1]a 2
[r11-ospf-1-area-0.0.0.2]nssa#r12 
[r12]ospf 1
[r12-ospf-1]a 2
[r12-ospf-1-area-0.0.0.2]nssa

在r4下方缺省路由

[r4]ospf 1
[r4-ospf-1]default-route-advertise 

修改接口类型

#r1 
[r1]int g 0/0/0
[r1-GigabitEthernet0/0/0]ospf network-type p2mp#r2 
[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]ospf network-type p2mp#r3
[r3]int g 0/0/1
[r3-GigabitEthernet0/0/1]ospf network-type p2p
[r3-GigabitEthernet0/0/1]int g 0/0/0
[r3-GigabitEthernet0/0/0]ospf network-type p2mp#r4
[r4]int g 0/0/1	
[r4-GigabitEthernet0/0/1]ospf network-type p2p 

修改hello时间 

[r1-GigabitEthernet0/0/0]ospf timer hello 5[r2-GigabitEthernet0/0/0]ospf timer hello 5[r3-GigabitEthernet0/0/0]ospf timer hello 5

ospf认证

#r3
[r3]ospf 1
[r3-ospf-1]a 0
[r3-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123456#r4 
[r4]ospf 1
[r4-ospf-1]a 0
[r4-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123456r6 
[r6]ospf 1
[r6-ospf-1]a 0
[r6-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123456#r7 
[r7]ospf 1
[r7-ospf-1]a 0
[r7-ospf-1-area-0.0.0.0]authentication-mode md5 1 cipher 123456

 配置nat

[r4-ospf-1]acl 2000	
[r4-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[r4-acl-basic-2000]q
[r4]int s 4/0/1	
[r4-Serial4/0/1]nat outbound 2000

五、结果

连通性测试

r1 ping r3的环回

r3 ping r6的环回

r1 ping ISP

r10的环回上进行ping测试