EIGRP - SIM
Given topology is running EIGRP. You need to troubleshoot and resolve EIGRP issues.
Question - 1 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.
Answer is B
Explanation - Check the EIGRP configuration on R2 to R5 Routers and you will see that on R4 EIGRP is using AS 2 when all other routers are using AS 1.
R4:
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
Question 2 -
Which path does traffic take from R1 to R5?
A. The traffic goes through R2.
B. The traffic goes through R3.
C. The traffic is equally load-balanced over R2 and R3.
D. The traffic is unequally load-balanced over R2 and R3.
Answer is A
Explanation -
There are 3 interface on R5.
1) Loopback0 10.5.5.5
2) Loopback1 10.5.5.55
3) FastEthernet0/0 192.168.123.5
We must check the routing table of R1 in order to find the path of traffic
D 10.0.0.0/8 [90/2300416] via 192.168.12.2, 00:01:57, Serial0/0/0
C 10.1.1.1/32 is directly connected, Loopback0
D 10.2.2.2/32 [90/2297856] via 192.168.12.2, 00:01:57, Serial0/0/0
D 10.3.3.3/32 [90/2298880] via 192.168.13.3, 00:01:57, Serial0/0/1
D 10.5.5.5/32 [90/2300416] via 192.168.12.2, 00:01:57, Serial0/0/0
D 10.5.5.55/32 [90/2300416] via 192.168.12.2, 00:01:57, Serial0/0/0
C 192.168.12.0/24 is directly connected, Serial0/0/0
C 192.168.13.0/24 is directly connected, Serial0/0/1
C 192.168.16.0/24 is directly connected, FastEthernet0/0
D 192.168.123.0/24 [90/2172416] via 192.168.12.2, 00:01:57, Serial0/0/0
Path to all subnets in R5 is going through ip address
192.168.12.2 which is in R2
Question - 3 Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?
A. The K values mismatch.
B. The AS does not match.
C. The network command is missing.
D. The passive-interface command is enabled.
Answer is C
Explanation - When we check the Running configuration of R6 we will see that interface eth0/0 is not advertised in EIGRP.
Question - 4 Why are the pings failing?
R1#ping
10.5.5.5 source loopback0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
A. The network statement is missing on R5.
B. The loopback interface is shut down on R5.
C. The network statement is missing on R1.
D. The IP address that is configured on the Lo1 interface on R5 is incorrect.
Answer is C
Explanation - On R1 under EIGRP interface loopback has not advertised.
