Scenario
Refer to the topology. Your company has connected the routers R1. R2. and R3 with serial links.
R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also
connected to the routers R4 and R5.
The EIGRP routing protocol is configured.
You are required to troubleshoot and resolve the EIGRP issues between the various routers.
Use the appropriate show commands to troubleshoot the issues.
The loopback interfaces on R4 with the IP addresses of 10.4.4.4 /32, 10.4.4.5/32. and 10.4.4.6/32
are not appearing in the routing table of R5 Why are the interfaces missing?
A.
The interfaces are shutdown, so they are not being advertised.
B.
R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
C.
Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
D.
The loopback addresses haven’t been advertised, and the network command is missing on R4.
On R4 we see EIGRP is configured with AS 2 (router eigrp 2) while other routers are using AS 1 (router eigrp 1).
Therefore R4 cannot see other routers and vice versa.
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Example:
R1#show running-config
Building configuration…
Current configuration : 1063 bytes
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
.
.
.
router eigrp 1
network 192.168.16.0
network 192.168.13.0
network 192.168.12.0
!
router eigrp 10
network 10.0.0.0
network 172.16.0.0
!
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R4:
int lo0
ip address 10.4.4.4 255.255.255.255
int lo1
ip address 10.4.4.5 255.255.255.255
int lo2
ip address 10.4.4.6 255.255.255.255
int e0/0
ip address 192.168.123.4 255.255.255.0
!
router eigrp 2
network 10.4.4.4 0.0.0.0
network 10.4.4.5 0.0.0.0
network 10.4.4.6 0.0.0.0
network 192.168.123.0
Note: the other routers are in eigrp 1
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The loopback addresses haven’t been advertised, and the network command is missing on R4.
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R45
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