CCNA辅导:EIGRP实验真题详解-Cisco思科认证考试网-优易学

CCNA辅导:EIGRP实验真题详解

来源：优易学 2011-12-2 18:59:45 【优易学：中国教育考试门户网】资料下载 IT书店

　　LAB: EIGRP
　　Question#
　　After adding RTR_2 router, no routing updates are being exchanged between RTR_1 and the new location. All other inter connectivity and internet access for the existing locations of the company are working properly.

　　The task is to identify the fault(s) and correct the router configuration to provide full connectivity between the routers.
　　Access to the router CLI can be gained by clicking on the appropriate host.
　　All passwords on all routers are cisco .
　　IP addresses are listed in the chart below.

　　RTR_A#show run
　　!
　　!
　　interface FastEthernet0/0
　　ip address 192.168.60.97 255.255.255.240
　　!
　　interface FastEthernet0/1
　　ip address 192.168.60.113 255.255.255.240
　　!
　　interface Serial0/0
　　ip address 192.168.36.14 255.255.255.252
　　clockrate 64000
　　!
　　router eigrp 212
　　network 192.168.36.0
　　network 192.168.60.0
　　no auto-summary
　　!
　　RTR_A#show ip route
　　192.168.36.0/30 is subnetted, 1 subnets
　　C 192.168.36.12 is directly connected, Serial 0/0
　　192.168.60.0/24 is variably subnetted, 5 subnets, 2 masks
　　C 192.168.60.96/28 is directly connected, FastEthernet0/0
　　C 192.168.60.112/28 is directly connected, FastEthernet0/1
　　D 192.168.60.128/28 [ 90/21026560 ] via 192.168.36.13, 00:00:57, Serial 0/0
　　D 192.168.60.144/28 [ 90/21026560 ] via 192.168.36.13, 00:00:57, Serial 0/0
　　D 192.168.60.24/30 [ 90/21026560 ] via 192.168.36.13, 00:00:57, Serial 0/0
　　D* 198.0.18.0 [ 90/21026560 ] via 192.168.36.13, 00:00:57, Serial 0/0

　　*****************************************
　　RTR_2#show run
　　!
　　!
　　interface FastEthernet0/0
　　ip address 192.168.77.34 255.255.255.252
　　!
　　interface FastEthernet0/1
　　ip address 192.168.60.65 255.255.255.240
　　!
　　interface FastEthernet1/0
　　ip address 192.168.60.81 255.255.255.240
　　!
　　!
　　router eigrp 22
　　network 192.168.77.0
　　network 192.168.60.0
　　no auto-summary
　　!
　　RTR_2#show ip route
　　192.168.60.0/28 is variably subnetted, 2 subnets
　　C 192.168.60.80 is directly connected, FastEthernet1/0
　　C 192.168.60.64 is directly connected, FastEthernet0/1
　　192.168.77.0/30 is subnetted, 1 subnets
　　C 192.168.77.32 is directly connected, FastEthernet0/0
　　**********************************************************
　　RTR_B#show run
　　!
　　interface FastEthernet0/0
　　ip address 192.168.60.129 255.255.255.240
　　!
　　interface FastEthernet0/1
　　ip address 192.168.60.145 255.255.255.240
　　!
　　interface Serial0/1
　　ip address 192.168.60.26 255.255.255.252
　　!
　　router eigrp 212
　　network 192.168.60.0
　　!
　　RTR_B#show ip route
　　192.168.60.0/24 is variably subnetted, 5 subnets, 2 masks
　　C 192.168.60.24/30 is directly connected, Serial0/1
　　C 192.168.60.128/28 is directly connected, FastEthernet0/0
　　C 192.168.60.144/28 is directly connected, FastEthernet0/1
　　D 192.168.60.96/28 [ 90/21026560 ] via 192.168.60.25, 00:00:57, Serial 0/1
　　D 192.168.60.112/28 [ 90/21026560 ] via 192.168.60.25, 00:00:57, Serial 0/1
　　192.168.36.0/30 is subnetted, 1 subnets
　　D 192.168.36.12 [ 90/21026560 ] via 192.168.60.25, 00:00:57, Serial 0/1
　　D* 198.0.18.0 [ 90/21026560 ] via 192.168.60.25, 00:00:57, Serial 0/1
　　*****************************************
　　RTR_1#show run
　　!
　　!
　　interface FastEthernet0/0
　　ip address 192.168.77.33 255.255.255.252
　　!
　　interface Serial1/0
　　ip address 198.0.18.6 255.255.255.0
　　!
　　!
　　interface Serial0/0
　　ip address 192.168.36.13 255.255.255.252
　　clockrate 64000
　　!
　　interface Serial0/1
　　ip address 192.168.60.25 255.255.255.252
　　clockrate 64000
　　!
　　!
　　router eigrp 212
　　network 192.168.36.0
　　network 192.168.60.0
　　network 192.168.85.0
　　network 198.0.18.0
　　no auto-summary
　　!

　　ip classless
　　ip default-network 198.0.18.0
　　ip route 0.0.0.0 0.0.0.0 198.0.18.5
　　ip http server
　　RTR_1#show ip route
　　192.168.36.0/30 is subnetted, 1 subnets
　　C 192.168.36.12 is directly connected, Serial 0/0
　　192.168.60.0/24 is variably subnetted, 5 subnets, 2 masks
　　C 192.168.60.24/30 is directly connected, Serial0/1
　　D 192.168.60.128/28 [ 90/21026560 ] via 192.168.60.26, 00:00:57, Serial 0/1
　　D 192.168.60.144/28 [ 90/21026560 ] via 192.168.60.26, 00:00:57, Serial 0/1
　　D 192.168.60.96/28 [ 90/21026560 ] via 192.168.36.14, 00:00:57, Serial 0/0
　　192.168.77.0/30 is subnetted, 1 subnets
　　C 192.168.77.32 is directly connected, FastEthernet0/0
　　C 192.0.18.0/24 is directly connected, Serial 1/0
　　*S 0.0.0.0 via 198.0.18.5
　　Explanation:
　　Step1:
　　Identify the faults in configuration on RTR_1 and RTR_2. As the SIM specifies all other inter connectivity and internet access for the existing locations of the company are working properly.
　　Routing Protocols used in the SIM is EIGRP with AS 212 as provided by exhibit.
　　Faults Identified:
　　Wrong AS (EIGRP 22) provided at RTR_2 (New router)
　　RTR_1 does not advertise the new network between RTR_1 and RTR_2 into EIGRP.
　　We need to correct the above two configuration mistakes to have full connectivity
　　Step2: Correcting the EIGRP AS to 212
　　Wrong AS (EIGRP 22) provided at RTR_2 (New router)
　　All routers that want to exchange routes within EIGRP needs to be in same Autonomous System.
　　Step 2.1:
　　First we need to remove the current wrong EIGRP AS 22 from Router RTR_2
　　Click on Host-F to get CLI of RTR_2
　　RTR_2>enable
　　Password : cisco (Provided by SIM Q )
　　RTR_2#conf t
　　RTR_2(conf)#
　　Step 2.2:
　　Removing the wrong EIGRP routing process with AS 22
　　RTR_2(conf)#no router eigrp 22
　　The above statement removes all the EIGRP configuration configured for AS 22 .
　　Step 2.3:
　　Adding the correct EIGRP configuration
　　Start the EIGRP routing process with AS 212
　　RTR_2(conf)#router eigrp 212
　　Step 2.4:
　　Advertise the directly connected networks into EIGRP on RTR_2
　　Fa 0/0 - 192.168.77.34
　　Fa 1/0 - 192.168.60.81
　　Fa 0/1 - 192.168.60.65
　　RTR_2(config-router)#network 192.168.60.0
　　RTR_2(config-router)#network 192.168.77.0
　　RTR_2(config-router)#no auto-summary
　　RTR_2(config-router)#end
　　Step 2.5:
　　Important save the changes made to router RTR_2
　　RTR_2#copy run start
　　Step 3:
　　RTR_1 does not advertise the new network between RTR_1 and RTR_2 into EIGRP.
　　Click on Host-G to get CLI of RTR_1
　　The network 192.168.77.0 is used between RTR_1 Fa0/0 - RTR_2 Fa 0/0
　　This network needs to be advertise into EIGRP routing process at RTR_1
　　RTR_1>enable
　　Password : cisco (Provided by SIM Q )
　　RTR_1#conf t
　　RTR_1(conf)#
　　Step 3.1:
　　Enter EIGRP routing process for AS 212
　　RTR_1(conf)#router eigrp 212
　　Step 3.2:
　　The network 192.168.77.0 is used between RTR_1 Fa0/0 - RTR_2 Fa 0/0 . Advertise this network into EIGRP
　　RTR_1(config-router)#network 192.168.77.0
　　RTR_1(config-router)#end
　　Step 3.3:
　　Important save the changes made to router RTR_1
　　RTR_1#copy run start
　　Verification:
　　From RTR_2 CLI
　　ping RTR_1 Serial 1/0 IP address 198.0.18.6
　　RTR_2#ping 198.0.18.6
　　!!!!!
　　A successful ping shows the new RTR_2 will have full connectivity with other routers.
　　Any Questions are welcomed!!!!!