Question 915 of 952 from exam 200-125: Cisco Certified Network Associate Exam
Question
EIGRP Simulation -
After adding Interior router, no routing updates are being exchanged between Perimeter 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 configurations 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 Address are listed in the chart below
Answers
Explanations
Click on the arrows to vote for the correct answer
A.A
Commands -
First we should check the configuration of the Interior Router.
Click the console PC "F" and enter the following commands.
Interior> enable -
Password: cisco -
Interior# show running-config -
Building configuration...
Current configuration : 770 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Interior
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
interface FastEthernet0/0
ip address 192.168.77.34 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.60.65 255.255.255.240
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 192.168.60.81 255.255.255.240
duplex auto
speed auto
!
router eigrp 22
network 192.168.77.0
network 192.168.60.0
no auto-summary
!
ip classless
!
line con 0
line vty 0 4
login
!
end
Interior#
From the output above, we know that this router was wrongly configured with an autonomous number (AS) of 22. When the AS numbers among routers are mismatched, no adjacency is formed.
(You should check the AS numbers on other routers for sure)
To solve this problem, we simply re-configure router Interior router with the following commands:
Interior# conf t -
Interior(config)# no router eigrp 22
Interior(config)# router eigrp 222
Interior(config-router)# network 192.168.60.0
Interior(config-router)# network 192.168.77.0
Interior(config-router)# no auto-summary
Interior(config-router)# end -
Interior# copy running-config startup-config
Second we should check the configuration of the Perimeter Router.
Click the console PC "G" and enter the following commands.
Perimeter> enable -
Password: cisco -
Perimeter# show running-config -
Building configuration...
Current configuration : 1029 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Perimeter
!
enable secret 5 $1$mERr$hx5rVt7rPNoS4wqbXKX7m0
!
interface FastEthernet0/0
ip address 192.168.77.33 255.255.255.252
duplex auto
speed auto
!
interface Serial0/0
ip address 192.168.36.13 255.255.255.252
clock rate 64000
!
interface Serial0/1
ip address 192.168.60.25 255.255.255.252
clock rate 64000
!
interface Serial1/0
ip address 198.0.18.6 255.255.255.0
!
interface Serial1/1
no ip address
shutdown
!
interface Serial1/2
no ip address
shutdown
!
interface Serial1/3
no ip address
shutdown
!
router eigrp 222
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 route 0.0.0.0 0.0.0.0 198.0.18.5
!
line con 0
line vty 0 4
login
!
end
Perimeter#
Notice that it is missing a definition to the network Interior. Therefore we have to add it so that it can recognize Interior router
Perimeter# conf t -
Perimeter(config)# router eigrp 222
Perimeter(config-router)# network 192.168.77.0
Perimeter(config-router)# end -
Perimeter# copy running-config startup-config
Now the whole network will work well. You should check again with ping command from router Interior to other routers!