實驗拓撲?
?
?
實驗要求
1.除R5的環回地址外,整個其他所有網段基于192.168.1.0/24進行合理的IP地址劃分
2.R1-R4每個路由器存在兩個環回接口,用于模擬pc網段;地址也在192.168.1.0/24這個網絡范圍內
3.R1-R4上不能直接編寫到達5.5.5.0/24的靜態路由,但依然可以訪問
4.全網可達,盡量減少每臺路由器,路由表條目數量,避免環路出現
5.R4與R5間,正常1000m鏈路通信,故障時自動改為100m
實驗步驟?
第一步:劃分網段
由題意知,需要6個骨干網線IP地址,8個環回接口,且需盡量減少每臺路由器,路由表條目數量,避免環路出現,于是如下劃分:
?
第二步:改名,配置IP地址、環回接口
先對五個路由器進行改名操作,然后開始配置IP地址(具體方法不一一闡述,不會的可以參考eNSP基礎命令),環回接口。如下:
r1:
[R1]int g 0/0/0
[R1-GigabitEthernet0/0/0]ip add 192.168.1.1 30
[R1-GigabitEthernet0/0/0]int g 0/0/1
[R1-GigabitEthernet0/0/1]ip add 192.168.1.5 30
[R1-GigabitEthernet0/0/1]int l0
[R1-LoopBack0]ip add 192.168.1.33 28
[R1-LoopBack0]int l1
[R1-LoopBack1]ip add 192.168.1.49 28r2:
[R2]int g 0/0/0
[R2-GigabitEthernet0/0/0]ip add 192.168.1.2 30
[R2-GigabitEthernet0/0/0]int g 0/0/1
[R2-GigabitEthernet0/0/1]ip add 192.168.1.9 30
[R2-GigabitEthernet0/0/1]int l0
[R2-LoopBack0]ip add 192.168.1.65 28
[R2-LoopBack0]int l1
[R2-LoopBack1]ip add 192.168.1.81 28r3:
[R3]int g 0/0/0
[R3-GigabitEthernet0/0/0]ip add 192.168.1.6 30
[R3-GigabitEthernet0/0/0]int g 0/0/1
[R3-GigabitEthernet0/0/1]ip add 192.168.1.13 30
[R3-GigabitEthernet0/0/1]int l0
[R3-LoopBack0]ip add 192.168.1.97 28
[R3-LoopBack0]int l1
[R3-LoopBack1]ip add 192.168.1.113 28r4:
[R4]int g 0/0/0
[R4-GigabitEthernet0/0/0]ip add 192.168.1.14 30
[R4-GigabitEthernet0/0/0]int g 0/0/1
[R4-GigabitEthernet0/0/1]ip add 192.168.1.10 30
[R4-LoopBack1]int g 0/0/2
[R4-GigabitEthernet0/0/2]ip add 192.168.1.17 30
[R4-GigabitEthernet0/0/2]int g 4/0/0
[R4-GigabitEthernet4/0/0]ip add 192.168.1.21 30
[R4-GigabitEthernet0/0/1]int l0
[R4-LoopBack0]ip add 192.168.1.129 28
[R4-LoopBack0]int l1
[R4-LoopBack1]ip add 192.168.1.145 28r5:
[R5]int g 0/0/0
[R5-GigabitEthernet0/0/0]ip add 192.168.1.18 30
[R5-GigabitEthernet0/0/0]int g 0/0/1
[R5-GigabitEthernet0/0/1]ip add 192.168.1.22 30
[R5-GigabitEthernet0/0/1]int l0
[R5-LoopBack0]ip add 5.5.5.5 24
?
第三步:配置靜態路由與空接口、配置浮動靜態路由
?
配置靜態路由,因為需要將R1,R2,R3,R4上每個網段進行匯總,且需要避免路由環路出現,所以還需要配置空接口。向r5中設置缺省路由,為了不直接編寫5.5.5.0/24也能到5.5.5.0/24網段;配置浮動靜態路由,調整優先級設置
全部配置完成以后,可實現全網通。
r1:
[R1]ip route-static 192.168.1.64 27 192.168.1.2
[R1]ip route-static 192.168.1.8 30 192.168.1.2
[R1]ip route-static 192.168.1.128 27 192.168.1.2
[R1]ip route-static 192.168.1.128 27 192.168.1.6
[R1]ip route-static 192.168.1.16 30 192.168.1.2
[R1]ip route-static 192.168.1.16 30 192.168.1.6
[R1]ip route-static 192.168.1.12 30 192.168.1.6
[R1]ip route-static 192.168.1.96 27 192.168.1.6
[R1]ip route-static 192.168.1.20 30 192.168.1.2
[R1]ip route-static 192.168.1.20 30 192.168.1.6[R1]ip route-static 0.0.0.0 0 192.168.1.2
[R1]ip route-static 0.0.0.0 0 192.168.1.6[R1]ip route-static 192.168.1.32 27 NULL 0r2:
[R2]ip route-static 192.168.1.128 27 192.168.1.10
[R2]ip route-static 192.168.1.16 30 192.168.1.10
[R2]ip route-static 192.168.1.12 30 192.168.1.10
[R2]ip route-static 192.168.1.96 27 192.168.1.10
[R2]ip route-static 192.168.1.96 27 192.168.1.1
[R2]ip route-static 192.168.1.4 30 192.168.1.1
[R2]ip route-static 192.168.1.32 27 192.168.1.1
[R2]ip route-static 192.168.1.20 30 192.168.1.10[R2]ip route-static 0.0.0.0 0 192.168.1.10[R2]ip route-static 192.168.1.64 27 NULL 0r3:
[R3]ip route-static 192.168.1.32 27 192.168.1.5
[R3]ip route-static 192.168.1.0 30 192.168.1.5
[R3]ip route-static 192.168.1.64 27 192.168.1.5
[R3]ip route-static 192.168.1.64 27 192.168.1.14
[R3]ip route-static 192.168.1.8 30 192.168.1.14
[R3]ip route-static 192.168.1.128 27 192.168.1.14
[R3]ip route-static 192.168.1.16 30 192.168.1.14
[R3]ip route-static 192.168.1.20 30 192.168.1.14[R3]ip route-static 0.0.0.0 0 192.168.1.14[R3]ip route-static 192.168.1.96 27 NULL 0r4:
[R4]ip route-static 192.168.1.96 27 192.168.1.13
[R4]ip route-static 192.168.1.4 30 192.168.1.13
[R4]ip route-static 192.168.1.32 27 192.168.1.13
[R4]ip route-static 192.168.1.32 27 192.168.1.9
[R4]ip route-static 192.168.1.0 30 192.168.1.9
[R4]ip route-static 192.168.1.64 27 192.168.1.9[R4]ip route-static 0.0.0.0 0 192.168.1.22 preference 61[R4]ip route-static 0.0.0.0 0 192.168.1.18[R4]ip route-static 192.168.1.128 27 NULL 0r5:
ip route-static 192.168.1.0 255.255.255.252 192.168.1.17
ip route-static 192.168.1.0 255.255.255.252 192.168.1.21 preference 61
ip route-static 192.168.1.4 255.255.255.252 192.168.1.17
ip route-static 192.168.1.4 255.255.255.252 192.168.1.21 preference 61
ip route-static 192.168.1.8 255.255.255.252 192.168.1.17
ip route-static 192.168.1.8 255.255.255.252 192.168.1.21 preference 61
ip route-static 192.168.1.12 255.255.255.252 192.168.1.17
ip route-static 192.168.1.12 255.255.255.252 192.168.1.21 preference 61
ip route-static 192.168.1.32 255.255.255.224 192.168.1.17
ip route-static 192.168.1.32 255.255.255.224 192.168.1.21 preference 61
ip route-static 192.168.1.64 255.255.255.224 192.168.1.17
ip route-static 192.168.1.64 255.255.255.224 192.168.1.21 preference 61
ip route-static 192.168.1.96 255.255.255.224 192.168.1.17
ip route-static 192.168.1.96 255.255.255.224 192.168.1.21 preference 61
ip route-static 192.168.1.128 255.255.255.224 192.168.1.17
ip route-static 192.168.1.128 255.255.255.224 192.168.1.21 preference 61
?
第四步:檢測是否全網可通
測試得全網可通,斷開r4的0/0/2接口,再次ping,依舊能通(不一一演示),如圖:
[R4]int g 0/0/2
[R4-GigabitEthernet0/0/2]shutdown
?
至此,實驗成功結束!!
?