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一、 地址描述
1. R1-R5都有一个loopback0 IP ADD = 10.10.X.X/24，X=ROUTER NUMBER，比如R1 的LO0 =10.10.1.1/24。
2. R1-R3以太口地址为：1.1.123.X/27，X=ROUTER NUMBER。
3. R3-R4接口地址为：1.1.34.X/29，X=ROUTER NUMBER。
4. R2-R4接口地址为：1.1.24.X/29，X=ROUTER NUMBER。
5. R4-R5接口地址为：1.1.45.X/24，X=ROUTER NUMBER。
二、 BRIDGE
1. 如图所示, 配置R1-R3的以太口地址。
2. 如图所示, 配置R2-R4之间物理接口的IP ADDRESS，R3-R4之间物理接口的IP ADDRESS。
3. 如果所示，配置R4-R5之间的链路为PPP的封装，并配置相应的接口地址。
4. 配置R1-R5的loopback0。
5. 配置完成后，测试各直连链路应能正常通讯。
R1(config)#int loo
R1(config)#int loopback 0
R1(config-if)#ip add
R1(config-if)#ip address 10.10.1.1 255.255.255.0
R1(config-if)#exit
R1(config-if)#exit
R1(config)#int f0/0
R1(config-if)#no shutdown
R1(config-if)#ip address 1.1.123.1 255.255.255.224
R1(config-if)#end
R1#en
R1#
R1#show ip r
R1#show ip rpu
R1#show ip ro
R1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/27 is subnetted, 1 subnets
C 1.1.123.0 is directly connected, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.1.0 is directly connected, Loopback0
R1#show ip rou
R1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/27 is subnetted, 1 subnets
C 1.1.123.0 is directly connected, FastEthernet0/0
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.1.0 is directly connected, Loopback0
R1#show ip int
R1#show ip interface bri
R1#show ip interface brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 1.1.123.1 YES manual up up
FastEthernet0/1 unassigned YES unset administratively down down
Serial1/0 unassigned YES unset administratively down down
Serial1/1 unassigned YES unset administratively down down
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
Loopback0 10.10.1.1 YES manual up
R2(config)#int loopback 0
R2(config-if)#ip addd
R2(config-if)#ip add
R2(config-if)#ip address 10.10.2.2 255.255.255.0
R2(config-if)#exit
R2(config)#int f0/0
R2(config-if)#no shu
R2(config-if)#no shutdown
R2(config-if)#ip add
R2(config-if)#ip address
R2(config-if)#ip address 1.1.123.2 255.255.255.224
R2(config-if)#exit
R2(config)#
R2(config)#int s1/0
R2(config-if)#no shut
R2(config-if)#no shutdown
R2(config-if)#ip add
R2(config-if)#ip address
R2(config-if)#ip address 1.1.24.2 255.255.255.248
R2(config-if)#
*Nov 3 19:31:24.299: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up
R2(config-if)#exit
R2(config)#end
R2#show ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 1.1.123.2 YES manual up up
FastEthernet0/1 unassigned YES unset administratively down down
Serial1/0 1.1.24.2 YES manual up up
Serial1/1 unassigned YES unset administratively down down
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
Loopback0 10.10.2.2 YES manual up up
R3(config)#int loopback 0
R3(config-if)#ip add
R3(config-if)#ip address 10.10.3.3 255.255.255.0
R3(config-if)#exit
R3(config)#int f0/0
R3(config-if)#no shuty
R3(config-if)#no shut
R3(config-if)#no shutdown
R3(config-if)#ip add
R3(config-if)#ip add
*Nov 3 19:22:10.175: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Nov 3 19:22:11.175: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R3(config-if)#ip add
R3(config-if)#ip address 1.1.123.3 255.255.255.224
R3(config-if)#exit
R3(config)#int s1/0
R3(config-if)#no shut
R3(config-if)#no shutdown
R3(config-if)#
R3(config-if)#ip address 1.1.24.2 255.255.255.
R3(config-if)#ip add
R3(config-if)#ip address 1.1.34.3 255.255.255.248
R3(config-if)#
R3(config-if)#end
R3#show
R3#show ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 1.1.123.3 YES manual up up
FastEthernet0/1 unassigned YES unset administratively down down
Serial1/0 1.1.34.3 YES manual up up
Serial1/1 unassigned YES unset administratively down down
Serial1/2 unassigned YES unset administratively down down
Serial1/3 unassigned YES unset administratively down down
Loopback0 10.10.3.3 YES manual up up
R4(config)#int loopback 0
R4(config-if)#ip add
R4(config-if)#ip address 10.10.4.4 255.255.255.0
R4(config-if)#exit
R4(config)#int s1/2
R4(config-if)#exit
R4(config)#int s1/0
R4(config-if)#ip add
R4(config-if)#ip address 1.1.34.4 255.255.255.248
R4(config-if)#no ip address 1.1.34.4 255.255.255.248
R4(config-if)#ip add
R4(config-if)#ip address 1.1.24.4 255.255.255.248
R4(config-if)#exit
R4(config)#int s1/2
R4(config-if)#exit
R4(config)#int s1/0
R4(config-if)#no shu
R4(config-if)#no shutdown
R4(config-if)#exit
R4(config)#
*Nov 3 19:30:15.355: %LINK-3-UPDOWN: Interface Serial1/0, changed state to up
*Nov 3 19:30:16.355: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to up
R4(config)#int s1/2
R4(config-if)#no shu
R4(config-if)#no shutdown
R4(config-if)#ipadd
R4(config-if)#ip add
R4(config-if)#ip address
*Nov 3 19:30:52.739: %LINK-3-UPDOWN: Interface Serial1/2, changed state to up
*Nov 3 19:30:53.739: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/2, changed state to up
R4(config-if)#ip address 1.1.34.4 255.255.255.248
R4(config-if)#exit
R4(config)#int s1/1
R4(config-if)#no shu
R4(config-if)#no shutdown
R4(config-if)#
*Nov 3 19:31:29.739: %LINK-3-UPDOWN: Interface Serial1/1, changed state to up
*Nov 3 19:31:30.739: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to up
R4(config-if)#ip addd
R4(config-if)#ip add
R4(config-if)#ip address 1.1.45.4 255.255.255.0
R4(config-if)#
*Nov 3 19:31:55.367: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to down
R4(config-if)#end
R4#show uo
*Nov 3 19:36:59.443: %SYS-5-CONFIG_I: Configured from console by console
R4#show ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
FastEthernet0/1 unassigned YES unset administratively down down
Serial1/0 1.1.24.4 YES manual up up
Serial1/1 1.1.45.4 YES manual up down
Serial1/2 1.1.34.4 YES manual up up
Serial1/3 unassigned YES unset administratively down down
Loopback0 10.10.4.4 YES manual up up
R4#en
R4#
R4#conf
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R4(config)#int s1/1
R4(config-if)#no shut
R4(config-if)#no shutdown
R4(config-if)#end
R4#show
*Nov 3 19:38:08.023: %SYS-5-CONFIG_I: Configured from console by console
R4#show ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset administratively down down
FastEthernet0/1 unassigned YES unset administratively down down
Serial1/0 1.1.24.4 YES manual up up
Serial1/1 1.1.45.4 YES manual up down
Serial1/2 1.1.34.4 YES manual up up
Serial1/3 unassigned YES unset administratively down down
Loopback0 10.10.4.4 YES manual up up
R4#show int s1/1
Serial1/1 is up, line protocol is down
Hardware is M4T
Internet address is 1.1.45.4/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
Last input never, output 00:00:03, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
57 packets output, 2020 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up
R4#en
R4#
R4#conf
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R4(config)#int s1/1
R4(config-if)#en
R4(config-if)#encapsulation ppp
R4(config-if)#end
R4#show
*Nov 3 19:40:58.567: %SYS-5-CONFIG_I: Configured from console by console
R4#show int s1/1
Serial1/1 is up, line protocol is down
Hardware is M4T
Internet address is 1.1.45.4/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP REQsent, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters 00:00:09
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
5 packets output, 70 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
R5(config)#int loopback 0
R5(config-if)#ip add
R5(config-if)#ip address 10.10.5.5 255.255.255.0
R5(config-if)#exit
R5(config)#int s1/1
R5(config-if)#ip add
R5(config-if)#ip address 1.1.45.5 255.255.255.0
R5(config-if)#exit
R5(config)#int s1/1
R5(config-if)#en
R5(config-if)#encapsulation ppp
R5(config-if)#
一、 RIP基本配置
1 .R1 R2 R3运行RIP Version 2，并把loopback0接口和直连以太网段宣告进RIP中。
R1(config)#router rip
R1(config-router)#ver
R1(config-router)#version 2
R1(config-router)#net
R1(config-router)#network 1.0.0.0
R1(config-router)#net
R1(config-router)#network 10.0.0.0
R1(config-router)#exit
R2(config)#router rip
R2(config-router)#ver
R2(config-router)#version 2
R2(config-router)#net
R2(config-router)#network 1.0.0.0
R2(config-router)#net
R2(config-router)#network 10.0.0.0
R2(config-router)#exit
R2(config)#router rip
R2(config-router)#no au
R2(config-router)#no auto-summary
R3(config)#router rip
R3(config-router)#ver
R3(config-router)#version 2
R3(config-router)#net
R3(config-router)#network 1.0.0.0
R3(config-router)#nei
R3(config-router)#net
R3(config-router)#network 10.0.0.0
R3(config-router)#exit
R3(config)#router rip
R3(config-router)#no au
R3(config-router)#no auto-summary
2.在三台路由器的路由表中都可以互相看到对方的loopback0路由。
3.在R1上，用最小的命令行，增加八个interface地址，地址为: 100.1.1.1/24 - 100.1.8.1/24，这八个地址在R1的RIP数据库中是作为外部路由出现。
R1(config)#int loo
R1(config)#int loopback 0
R1(config-if)#ip add
R1(config-if)#ip address 100.1.1.1.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.1.1.1 255.255.255.0 secon
R1(config-if)#ip address 100.1.1.1 255.255.255.0 secon
R1(config-if)#ip address 100.1.1.1 255.255.255.0 secondary
R1(config-if)#ip add
R1(config-if)#ip address 100.1.2.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.2.1 255.255.255.0 secondary
R1(config-if)#ip add
R1(config-if)#ip address 100.1.3.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.3.1 255.255.255.0 secondary
R1(config-if)#
R1(config-if)#ip add
R1(config-if)#ip address 100.1.4.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.4.1 255.255.255.0 secondary
R1(config-if)#ip add
R1(config-if)#ip address 100.1.5.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.5.1 255.255.255.0 secondary
R1(config-if)#ip add
R1(config-if)#ip address 100.1.6.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.6.1 255.255.255.0 secondary
R1(config-if)#ip add
R1(config-if)#ip address 100.1.7.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.7.1 255.255.255.0 secondary
R1(config-if)#ip add
R1(config-if)#ip address 100.1.8.1 255.255.255.0 sec
R1(config-if)#ip address 100.1.8.1 255.255.255.0 secondary
R1(config-if)#
4.只在R1做配置，并使用最小的命令行，使R3上可以看到的这八个网段的七个, 看不到100.1.8.0/24这条路由，
且奇数路由的metric为5, 偶数路由的metric为7，不允许用Offset-list。
R1(config)#acc
R1(config)#access-list 1 deny 100.1.8.0
R1(config)#acc
R1(config)#access-list per
R1(config)#access-list 1 per
R1(config)#access-list 1 permit any
R1(config)#router rip
R1(config-router)#dis
R1(config-router)#distri
R1(config-router)#distribute-list 1 out f0/0
R1(config)#access-list 2 permit 100.1.0.0 0.0.6.0
R1(config)#acc
R1(config)#access-list 3 per
R1(config)#access-list 3 permit 100.1.1.0 0.0.6.0
R1(config)#route-ma
R1(config)#route-map A permit
R1(config)#route-map A permit 10
R1(config-route-map)#match ip add
R1(config-route-map)#match ip address 2
R1(config-route-map)#set m
R1(config-route-map)#set met
R1(config-route-map)#set metric 7
R1(config-route-map)#exit
R1(config)#route-
R1(config)#route-map A per
R1(config)#route-map A permit 20
R1(config-route-map)#ma
R1(config-route-map)#match ip addre
R1(config-route-map)#match ip address 3
R1(config-route-map)#set me
R1(config-route-map)#set metric 5
R1(config-route-map)#exit
R1(config)#router rip
R1(config-router)#redis
R1(config-router)#redistribute con
R1(config-router)#redistribute connected rou
R1(config-router)#redistribute connected route-map
R1(config-router)#redistribute connected route-map A
R1(config-router)#
1. 不可以在R2做任何配置，使R2看不到100网段的7条路由, 但可以看到R1和R3的loopback路由，不能通过Version 1, 2来解决此问题。
R1(config)#
R1(config)#router rip
R1(config-router)#passi
R1(config-router)#route rip
R1(config-router)#pass
R1(config-router)#passive-interface f0/0
R1(config-router)#nei
R1(config-router)#neighbor 1.1.123.3
R1(config-router)#network 10.10.3.3
R1(config-router)#
R1(config-router)#
R1(config-router)#
R1(config-router)#
R1(config-router)#
R3(config)#access-list 1 deny 100.1.0.0 0.0.7.0
R3(config)#acc
R3(config)#access-list 1 per
R3(config)#access-list 1 permit any
R3(config)# route rip
% Ambiguous command: " route rip"
R3(config)# router rip
R3(config-router)#dis
R3(config-router)#distri
R3(config-router)#distribute-list 1 out f0/0
一、 EIGRP 100配置
1. 在R2 R3 R4的链路运行EIGRP 100，将R4的loopback0接口宣告到EIGRP 100。在R4上，show ip eigrp neighbors，可以看到两个邻接关系。
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R3(config)#router eigrp 100 R3(config-router)#net R3(config-router)#net R3(config-router)#network 1.1.34.3 0.0.0.0 R3(config-router)# R2(config)#router eigrp R2(config)#router eigrp 100 R2(config-router)#net R2(config-router)#network 1.1.24.2 0.0.0.0 R4(config)#router eigrp 100 R4(config-router)#network 1.1.24.4 0.0.0.0
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1. 假设R4的F0/0口的地址为:150.1.1.1/24，使R4与BB2建立EIGRP邻接关系，此时R4会收到很多从BB2传递过来的路由，包括：A、B、C类。用最小的Prefix-list命令，只允许B类路由进入R4。
R4(config)#int f0/0
R4(config-if)#ip add
R4(config-if)#ip address 150.1.1.1 255.255.255.0
R4(config-if)#ip pr
R4(config-if)#ip pre
R4(config-if)#exit
R4(config)#ip pre
R4(config)#ip prefix-list B seq
R4(config)#ip prefix-list B seq 5 pert
R4(config)#ip prefix-list B seq 5 per
R4(config)#ip prefix-list B seq 5 permit 128.0.0.0/2 le 32
R4(config)#router ei
R4(config)#router eigrp 100
R4(config-router)#net
R4(config-router)#network 150.1.1.1 0.0.0.0
R4(config)#router ei
R4(config)#router eigrp 100
R4(config-router)#dis
R4(config-router)#distr
R4(config-router)#distribute-list pre
R4(config-router)#distribute-list prefix
R4(config-router)#distribute-list prefix B in f0/0
R4(config-router)#
2. 在R2和R3上做RIP与EIGRP的双向重分布。使R4上看不到100.0.0.0网段的任何路由。此解决方案不能用Route-map，不能用基于接口的过滤，也不能通过metric的方法。
R2(config)#router ei
R2(config)#router eigrp 100
R2(config-router)#redis
R2(config-router)#redistribute rip me
R2(config-router)#redistribute rip metric 100000 10 255 1 1500
R2(config-router)#exit
R2(config)#router rip
R2(config-router)#red
R2(config-router)#redistribute eig
R2(config-router)#redistribute eigrp 100 me
R2(config-router)#redistribute eigrp 100 metric 1
R2(config-router)#
R3(config)#router ei
R3(config)#router eigrp 100
R3(config-router)#redi
R3(config-router)#redistribute
*Nov 3 22:36:53.251: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: Interface Goodbye received
R3(config-router)#redistribute rip me
R3(config-router)#redistribute rip metric 1
*Nov 3 22:36:58.167: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config-router)#redistribute rip metric 100000 10 255 1 1500
R3(config-router)#
R3(config-router)#
R3(config-router)#exit
R3(config)#router rip
R3(config-router)#
R3(config-router)#re
R3(config-router)#redistribute ei
R3(config-router)#redistribute eigrp 100 me
R3(config-router)#redistribute eigrp 100 metric
% Incomplete command.
R3(config-router)#redistribute eigrp 100 metric 1
R3(config-router)#
R3(config-router)#acc
R3(config-router)#exit
R3(config)#
R3(config)#acce
R3(config)#access-list 1 deny 100.1.0.0 0.0.7.0
R3(config)#acc
R3(config)#access-list 1 per
*Nov 3 22:38:13.927: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: Interface Goodbye received
R3(config)#access-list 1 per
R3(config)#access-list 1 permit any
R3(config)#
*Nov 3 22:38:18.307: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config)#router eig
R3(config)#router eigrp 100
R3(config-router)#dis
R3(config-router)#distr
R3(config-router)#distribute-list 1 out rip
R3(config-router)#
3. 使R2 R3 R4之间的EIGRP Hello=2s，HOLD Time=10s。
R2(config)#int s1/0
R2(config-if)#bandw
R2(config-if)#bandwidth 1545
R2(config-if)#exit
4. R2 R3 R4之间的EIGRP请开启认证。
R2(config)#int s1/0
R2(config-if)#bandw
R2(config-if)#bandwidth 1545
R2(config-if)#exit
R2(config)#key ch
R2(config)#key chain
R2(config)#key chain A
R2(config-keychain)#key 1
R2(config-keychain-key)#key
R2(config-keychain-key)#key-string cisco
R2(config-keychain-key)#exit
R2(config-keychain)#
R2#
*Nov 3 22:44:02.543: %SYS-5-CONFIG_I: Configured from console by console
R2#
R2#^V^Z% Unknown command or computer name, or unable to find computer address
R2#conf
R2#configure
R2#configure
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int s1/0
R2(config-if)#ip au
R2(config-if)#ip authentication mo
R2(config-if)#ip authentication mode ei
R2(config-if)#ip authentication mode eigrp 100 md5
R2(config-if)#
*Nov 3 22:46:29.123: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.24.4 (Serial1/0) is down: authentication mode changed
R2(config-if)#ip au
R2(config-if)#ip authentication ke
R2(config-if)#ip authentication key-chain ei
R2(config-if)#ip authentication key-chain eigrp 100 A
同r3 r4
5. 在R2上，增加一个loopback1，其IP地址为：161.1.1.1/24，宣告进入EIGRP，这时R4上应只可以看到161网段的三条路由: 161.1.0.0/16，161.1.0.0/18，161.1.0.0/20三条路由。 而在R1上只能看到161.1.1.0/24的路由，不能用Route-map，可以使用基于接口的过滤。
R2(config)#int loo
R2(config)#int loopback 1
R2(config-if)#ip add
R2(config-if)#ip address 161.1.1.1 255.255.255.0
R2(config-if)# exit
R2(config)#router ei
R2(config)#router eigrp 100
R2(config-router)#nety
R2(config-router)#net
R2(config-router)#network 161.1.1.1 0.0.0.0
R2(config-router)#exit
R2(config)#network 161.1.1.1 0.0.0.00
^
% Invalid input detected at '^' marker.
R2(config)#network 161.1.1.1 0.0.0.00^Z ^
% Invalid input detected at '^' marker.
R2#
*Nov 3 22:52:16.235: %SYS-5-CONFIG_I: Configured from console by console
R2#conf
R2#configure
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#
R2(config)#int s1/0
R2(config-if)#ip su
R2(config-if)#ip summary-address ei
R2(config-if)#ip summary-address eigrp 100 161.1.0.0 255.255.240.0
R2(config-if)#
*Nov 3 22:52:50.503: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.24.4 (Serial1/0) is down: summary configured
R2(config-if)#ip summary-address eigrp 100 161.1.0.0 255.255.24
*Nov 3 22:52:52.123: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.24.4 (Serial1/0) is up: new adjacency
R2(config-if)#ip summary-address eigrp 100 161.1.0.0 255.255.192.0
R2(config-if)#
*Nov 3 22:52:58.011: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.24.4 (Serial1/0) is down: summary configured
R2(config-if)#ip summary-address eigrp 100 161.1.0.0 255.255.1
*Nov 3 22:53:01.619: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.24.4 (Serial1/0) is up: new adjacency
R2(config-if)#ip summary-address eigrp 100 161.1.0.0 255.255.0.0
R2(config-if)#
*Nov 3 22:53:04.871: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.24.4 (Serial1/0) is down: summary configured
R2(config-if)#
R2(config-if)#
R2(config-if)#
*Nov 3 22:53:06.199: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.24.4 (Serial1/0) is up: new adjacency
R2(config-if)#acc
R2(config-if)#exit
R2(config)#acc
R2(config)#access-list deny 161.1.0.0
^
% Invalid input detected at '^' marker.
R2(config)#access-list 1 deny 161.1.0.0
R2(config)#access-list 1 per
R2(config)#access-list 1 permit
R2(config)#access-list 1 permit any
R2(config)#
R2(config)#router rip
R2(config-router)#dis
R2(config-router)#distr
R2(config-router)#distribute-list 1out f0/0
1. 把R3的loopback0宣告进EIGRP，使R4可以看到两条等价路由。
R3(config)#router ei
R3(config)#router eigrp 100
R3(config-router)#net
R3(config-router)#network 10.10.3.3 0.0.0.0
R3(config-router)#exit
R3(config)#int loo
R3(config)#int loopback 0
R3(config-if)#delq
R3(config-if)#del
R3(config-if)#delay 10
R3(config-if)#
1. 在R3上增加一个loopback5，其地址为：5.5.5.5/32，同时宣告到RIP与EIGRP中。在R3上做配置，使R4可以看到此路由，且metric值为: 100000000，下一跳指向R3，当R3-R4的链路断了后，R4可以通过R2到达此路由，且不需要重新收敛。
R3(config)#
R3(config)#router eigrp 100
R3(config-router)#net
R3(config-router)#network 5.5.5.5 0.0.0.0
R3(config-router)#
R3(config-router)#acc
R3(config-router)#exit
R3(config)#acc
R3(config)#access-list 3 per
R3(config)#access-list 3 permit 5.5.5.5
R3(config)#router ei
R3(config)#router eigrp 100
R3(config-router)#off
R3(config-router)#offset-list 2ou
*Nov 4 00:06:57.174: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: retry limit exceeded
*Nov 4 00:06:57.426: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config-router)#offset-list 2 out 97703168 s1/0
R3(config-router)#
*Nov 4 00:07:26.130: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: route configuration changed
R3(config-router)#
*Nov 4 00:07:30.378: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config-router)#
R3#
*Nov 4 00:08:32.486: %SYS-5-CONFIG_I: Configured from console by console
R3#
*Nov 4 00:08:49.890: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: retry limit exceeded
R3#
*Nov 4 00:08:54.790: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3#chonf
Translating "chonf"
Translating "chonf"
% Unknown command or computer name, or unable to find computer address
R3#
R3#conf
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#
R3(config)#
R3(config)#router eig
R3(config)#router eigrp
% Incomplete command.
R3(config)#
R3(config)#router eigrp 100
R3(config-router)#odd
R3(config-router)#off
R3(config-router)#offset-list 2 out 92203168 s1/0
1. 在R3上增加一个loopback6，其地址为：6.6.6.6/32，同时宣告到RIP及EIGRP。使R4可以看到此路由，下一跳指向R2，当R2-R4的链路断了后，R4可以通过R3到达此路由，且不需要重新收敛。请用Distance xx来完成此任务, 如果修改metric时，不能用Offset-list，不可以影响其他路由。
R4(config)#router eigrp 100
R4(config-router)#dis
R4(config-router)#dista
R4(config-router)#distance 170 1.1.34.3 0.0.0.0 1
R4(config-router)#exit
R4(config)#
R4(config)#ac
R4(config)#access-list 1 per
R4(config)#access-list 1 permit 10.10.3.0
R4(config)#access-list 1 permit 6.6.6.6
R4(config)#
R3#conf
R3#configure
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#
R3(config)#int lo6
R3(config-if)#
R3(config-if)#ip add
R3(config-if)#ip address 6.6.6.6 255.255.255.255
R3(config-if)#
R3(config-if)#exit
R3(config)#
*Nov 4 00:11:14.406: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: retry limit exceeded
R3(config)#router
*Nov 4 00:11:18.286: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config)#router rip
R3(config-router)#net
R3(config-router)#network 6.0.0.0
R3(config-router)#router ei
R3(config-router)#exit
R3(config)#router ei
R3(config)#router eigrp 100
R3(config-router)#6.6.6.6 0.0.0.0
^
% Invalid input detected at '^' marker.
R3(config-router)#net
R3(config-router)#network
R3(config-router)#network 6.6.6.6 0.0.0.0
1. 针对上题，如果需要安装两条非等价路由该如何做，如果要求数据包只使用metric小的那条路由，该如何做？不需要考虑ROUTE-CACHE，CEF等。
R4(config)#router eigrp 100
R4(config-router)#var
R4(config-router)#variance 2
R4(config-router)#tr
R4(config-router)#traffic-share min
R4(config-router)#traffic-share min ac
R4(config-router)#traffic-share min across-interfaces
2. R4向BB2只注入一条Default Route，不可以向其他路由器注入默认路由，不要使用任何形式的过滤。
R4(config)#
R4(config)#int f0/0
R4(config-if)#ip su
R4(config-if)#ip summary-address ei
R4(config-if)#ip summary-address eigrp 100
*Nov 4 00:16:14.490: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.3 (Serial1/2) is down: Interface Goodbye received
R4(config-if)#ip summary-address eigrp 100 0.0.0.0 0.0.0.0
一、 EIGRP 99配置
1. R4-R5之间的PPP链路运行EIGRP 99，请使用单播建立EIGRP邻居关系，并把R5的loopback0宣告进EIGRP进程。
R4(config)#router ei
R4(config)#router eigrp 99
R4(config-router)#net
R4(config-router)#network
*Nov 4 00:17:36.906: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.3 (Serial1/2) is down: Interface Goodbye received
R4(config-router)#network 1.1.45.4
*Nov 4 00:17:41.570: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.3 (Serial1/2) is up: new adjacency
R4(config-router)#network 1.1.45.4 0.0.0.0
R4(config-router)#nei
R4(config-router)#neighbor 1.1.45.5 s1/1
R4(config-router)#no au
R4(config-router)#no auto-summary
R4(config-router)#
R5(config)#router ei
R5(config)#router eigrp 99
R5(config-router)#net
R5(config-router)#network 1.1.45.5 0.0.0.0
R5(config-router)#net
R5(config-router)#network 10.10.5.5 0.0.0.0
R5(config-router)#neiu
R5(config-router)#nei
R5(config-router)#neighbor 1.1.45.4 s1/1
R5(config-router)#no au
R5(config-router)#no auto-summary
R5(config-router)#
2. 在R5上增加一个loopback1，其地址为：7.7.7.7/32，使其在R4看到是一条外部路由: 7.7.7.7/32 ( 90/xxxxx )。 R4要向R5只注入一条默认路由，不能用接口下汇总，也不能用distribute-list，不能用route-map。
R5(config)#
R5(config)#
R5(config)#in lo1
R5(config-if)#ip add
R5(config-if)#ip address 7.7.7.7 255.255.255.0
R5(config-if)#route
R5(config-if)#exit
R5(config)#route-
R5(config)#route-map Aper
R5(config)#route-map per
R5(config)#route-map A per
R5(config)#route-map A permit 10
R5(config-route-map)#match in
R5(config-route-map)#match interface lo
R5(config-route-map)#match interface loopback 1
R5(config-route-map)#
R5(config-route-map)#
R5(config-route-map)#exit
R5(config)#router ei
R5(config)#router eigrp 99
R5(config-router)#red
R5(config-router)#redistribute co
R5(config-router)#redistribute connected ro
R5(config-router)#redistribute connected route-map A
R4(config)#router eigrp 99
R4(config-router)#dis
R4(config-router)#dista
R4(config-router)#distance ei
R4(config-router)#distance eigrp 90 90
R4(config-router)#eig
R4(config-router)#eigrp s
R4(config-router)#eigrp stub st
R4(config-router)#eigrp stub static
*Nov 4 00:22:54.454: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 99: Neighbor 1.1.45.5 (Serial1/1) is down: route configuration changed
R4(config-router)#eigrp stub static
R4(config-router)#re
R4(config-router)#redistribute
*Nov 4 00:22:57.574: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 99: Neighbor 1.1.45.5 (Serial1/1) is up: new adjacency
R4(config-router)#redistribute st
R4(config-router)#redistribute static
R4(config-router)#
R4(config-router)#ip r
R4(config-router)#ip rou
R4(config-router)#ip rou
*Nov 4 00:23:07.630: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.3 (Serial1/2) is down: retry limit exceeded
R4(config-router)#ip rout
R4(config-router)#iexit
^
% Invalid input detected at '^' marker.
R4(config-router)#
*Nov 4 00:23:11.610: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.3 (Serial1/2) is up: new adjacency
R4(config-router)#exit
R4(config)#ip route
R4(config)#ip route 0.0.0.0 0.0.0.0 null 0
1. 在R4上，把EIGRP 100与EIGRP 99做双向重分布。在R1上看到7.7.7.7/32这条路由下一跳指向R2，如果R2不可达，则R1可以通过R3到达到达此路由。R2与R3是可以相互传递路由，此方案还需要考虑双点双向重分布可能会出现的路由环路或次优路径的问题。
R4#conf
R4#configure
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R4(config)#
R4(config)#router ei
R4(config)#router eigrp 99
R4(config-router)#re
R4(config-router)#redistribute ei
R4(config-router)#redistribute eigrp 100
R4(config-router)#exit
R4(config)#router ei
R4(config)#router eigrp 100
R4(config-router)#re
R4(config-router)#redistribute ri
R4(config-router)#redistribute e
R4(config-router)#redistribute eigrp 99
R2(config)#
R2(config)#
R2(config)#acc
R2(config)#access-list 10 per
R2(config)#access-list 10 permit 7.7.7.7
R2(config)#acc
R2(config)#access-list 10 per
R2(config)#access-list 10 permit 10.10.5.0
R2(config)#access-list 10 permit 1.1.45.0
R2(config)#router rip
R2(config-router)#dis
R2(config-router)#dista
R2(config-router)#distance 171 1.1.123.3 0.0.0.0 10
R2(config-router)#
R3#acc
R3#access-l
R3#conf
R3#configure
R3#configure
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#
R3(config)#
R3(config)#acc
R3(config)#access-list 10 per
R3(config)#access-list 10 permit 7.7.7.7
R3(config)#access-list 10 permit 10.10.5.0
R3(config)#access-list 10 permit 1.1.45.0
R3(config)#router rip
R3(config-router)#fis
R3(config-router)#dis
R3(config-router)#dista
R3(config-router)#distance 171
*Nov 4 00:30:28.214: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: Interface Goodbye received
R3(config-router)#distance 171 1.1.123.3 0.
*Nov 4 00:30:32.646: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config-router)#distance 171 1.1.123.3 0.0.0.0 10
R2(config)#route
R2(config)#route-
R2(config)#route-m
R2(config)#route-map R-E deny 10
R2(config-route-map)#match ta
R2(config-route-map)#match tag 180
R2(config-route-map)#exit
R2(config)#route-map
R2(config)#route-map R-E per
R2(config)#route-map R-E permit 20
R2(config-route-map)#set t
R2(config-route-map)#set ta
R2(config-route-map)#set tag 120
R2(config-route-map)#exit
R2(config)#rou
R2(config)#route-m
R2(config)#route-map E-R de
R2(config)#route-map E-R deny 10
R2(config-route-map)#mat
R2(config-route-map)#match tag 130
R2(config-route-map)#
R2(config-route-map)#exit
R2(config)#route-map E-R per
R2(config)#route-map E-R permit 20
R2(config-route-map)#set tag 170
R2(config-route-map)#
R2(config-route-map)#
R2(config-route-map)#exit
R2(config)#router ei
R2(config)#router eigrp 100
R2(config-router)#redi
R2(config-router)#redistribute r
R2(config-router)#redistribute ri
R2(config-router)#redistribute rip me
R2(config-router)#redistribute rip metric 100000 10 255 1 1500 rout
R2(config-router)#redistribute rip metric 100000 10 255 1 1500 route-map R-E
R2(config-router)#EAXIT
^
% Invalid input detected at '^' marker.
R2(config-router)#EXIT
R2(config)#router rip
R2(config-router)#redi
R2(config-router)#redistribute ei
R2(config-router)#redistribute eigrp 100 me
R2(config-router)#redistribute eigrp 100 metric 1 roou
R2(config-router)#redistribute eigrp 100 metric 1 rou
R2(config-router)#redistribute eigrp 100 metric 1 route-map E-R
R2(config-router)#
R3(config)#route-ma
R3(config)#route-map E-R de
R3(config)#route-map E-R deny 10
R3(config-route-map)#ma
R3(config-route-map)#match ta
R3(config-route-map)#match tag 120
R3(config-route-map)#
R3(config-route-map)#
R3(config-route-map)#exit
R3(config)#route-ma
R3(config)#route-map
*Nov 4 00:37:20.594: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: Interface Goodbye received
R3(config)#route-map E-
*Nov 4 00:37:24.958: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config)#route-map E-R per
R3(config)#route-map E-R permit 15
R3(config-route-map)#match ip add
R3(config-route-map)#match ip address 15
R3(config-route-map)#
R3(config-route-map)#match ip address 7
R3(config-route-map)#set me
R3(config-route-map)#set metric 2
R3(config-route-map)#set tag 180
R3(config-route-map)#exit
R3(config)#route-
R3(config)#route-map E-R
*Nov 4 00:38:44.474: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: retry limit exceeded
R3(config)#route-map E-R per
R3(config)#route-map E-R permit
*Nov 4 00:38:47.210: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config)#route-map E-R permit 20
R3(config-route-map)#set ta
R3(config-route-map)#set tag 180
R3(config-route-map)#
R3(config-route-map)#exit
R3(config)#
R3(config)#route-ma
R3(config)#route-map E-R per
R3(config)#route-map E-R permit 20
R3(config-route-map)#set
R3(config-route-map)#set ta
R3(config-route-map)#set tag 180
R3(config-route-map)#exit
R3(config)#
R3(config)#route
R3(config)#route-m
R3(config)#route-map R-E deny 10
R3(config-route-map)#
R3(config-route-map)#
R3(config-route-map)#ma
R3(config-route-map)#match ta
R3(config-route-map)#match tag 170
R3(config-route-map)#
*Nov 4 00:40:06.722: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: retry limit exceeded
R3(config-route-map)#exi
*Nov 4 00:40:10.358: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config-route-map)#exit
R3(config)#
R3(config)#route-m
R3(config)#route-map R-E per
R3(config)#route-map R-E permit 20
R3(config-route-map)#set tag 130
R3(config-route-map)#
R3(config-route-map)#
R3(config-route-map)#exit
R3(config)#acc
R3(config)#access-list 7 per
R3(config)#access-list 7 permit 7.7.7.7
R3(config)#router ei
R3(config)#router eigrp 100
R3(config-router)#
R3(config-router)#re
R3(config-router)#redistribute ri
R3(config-router)#redistribute rip me
R3(config-router)#redistribute rip metric 100000 10 255 1 1500 route0m
R3(config-router)#redistribute rip metric 100000 10 255 1 1500 route-m
R3(config-router)#redistribute rip metric 100000 10 255 1 1500 route-map R
*Nov 4 00:41:29.870: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is down: retry limit exceeded
R3(config-router)#redistribute rip metric 100000 10 255 1 1500 route-map R-E
R3(config-router)#
R3(config-router)#
*Nov 4 00:41:33.962: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 1.1.34.4 (Serial1/0) is up: new adjacency
R3(config-router)#
R3(config-router)#exit
R3(config)#router rip
R3(config-router)#
R3(config-router)#re
R3(config-router)#redistribute ri
R3(config-router)#redistribute ei
R3(config-router)#redistribute eigrp 100 me
R3(config-router)#redistribute eigrp 100 metric 1 rou
R3(config-router)#redistribute eigrp 100 metric 1 route-map E-r
R3(config-router)#redistribute eigrp 100 metric 1 route-map E-R
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