CCNA 3 Chapter 8: EIGRP Advanced Configurations and Troubleshooting

Question 1

Which command can be issued on a router to verify that automatic summarization is enabled?

Answer 1

show ip protocols

Question 2

Which address best summarizes the IPv6 addresses 2001:DB8:ACAD::/48, 2001:DB8:9001::/48, and 2001:DB8:8752::/49?

Answer 2

2001:DB8:8000::/34

Question 3

Refer to the exhibit. Router R3 is receiving multiple routes through the EIGRP routing protocol. Which statement is true about the implementation of summarization in this network?

Answer 3

Automatic summarization is disabled on R3

Question 4

Refer to the exhibit. Considering that R2, R3, and R4 are correctly configured, why did R1 not establish an adjacency with R2, R3, and R4?

Answer 4

because the Fa0/0 interface of R1 is declared as passive for EIGRP

Question 5

In which IOS CLI mode must a network administrator issue the maximum-paths command to configure load balancing in EIGRP?​

Answer 5

router configuration mode

Question 6

Two routers, R1 and R2, have established an EIGRP neighbor relationship, but there is still a connectivity problem. Which issue could be causing this problem?​

Answer 6

an access list that is blocking advertisements from other networks

Question 7

Refer to the exhibit. Remote users are experiencing connectivity problems when attempting to reach hosts in the 172.21.100.0 /24 network. Using the output in the exhibit, what is the most likely cause of the connectivity problem?

Answer 7

The GigabitEthernet 0/1 interface is not participating in the EIGRP process.

Question 8

In which scenario will the use of EIGRP automatic summarisation cause inconsistent routing in a network?

Answer 8

when the routers in an IPv4 network are connected to discontiguous networks with automatic summarization enabled*

Question 9

Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor adjacency.

What action should be taken to solve this problem?

Answer 9

Configure both routers with the same EIGRP process ID.

Question 10

Refer to the exhibit. Which statement accurately reflects the configuration of routing on the HQ router?

Answer 10

A static default route was configured on this router.

Question 11

Refer to the exhibit. Which statement is supported by the output?

Answer 11

A default route is being learned through an external process.

Question 12

Refer to the exhibit. Which two routes will be advertised to the router ISP if autosummarization is disabled? (Choose two.)

Answer 12

1. 10.1.2.0/24

2. 10.1.4.0/30

Question 13

Refer to the exhibit. A network administrator has configured EIGRP authentication between routers R1 and R2. After the routing tables are reviewed, it is noted that neither router is receiving EIGRP updates. What is a possible cause for this failure?

Answer 13

The same autonomous system numbers must be used in the interface configurations of each router.

Question 14

Two routers, R1 and R2, share a 64 kb/s link. An administrator wants to limit the bandwidth used by EIGRP between these two routers to 48 kb/s. Which command is used on both routers to configure the new bandwidth setting?

Answer 14

ip bandwidth-percent eigrp 100 75

Question 15

Which three statements are advantages of using automatic summarization? (Choose three.)

Answer 15

1. It decreases the number of entries in the routing table.
2. It reduces the frequency of routing updates.
3. It ensures that traffic for multiple subnets uses one path through the internetwork.

Question 16

Refer to the exhibit. After the configuration shown is applied on router R1, the exhibited status message is displayed. Router R1 is unable to form a neighbor relationship with R2 on the serial 0/1/0 interface. What is the most likely cause of this problem?

Answer 16

The IPv4 address configured on the neighbor that is connected to R1 serial 0/1/0 is incorrect.

Question 17

What is a characteristic of manual route summarization?

Answer 17

reduces total number of routes in routing tables

Question 18

Fill in the blank. Do not use abbreviations.

The ” _____ ” command causes an EIGRP router to stop sending hello packets through an interface.

Answer 18

passive-interface

Question 19

Refer to the exhibit. A network administrator has issued the shown commands. The EIGRP routing domain has completely converged and a network administrator is planning on configuring EIGRP authentication throughout the complete network. On which two interfaces should EIGRP authentication be configured between R2 and R3? (Choose two.)

Answer 19

1. serial 0/1/0 of R2.

2. serial 0/0/1 of R3

Question 20

Fill in the blank. Do not use abbreviations.

What is the command that should be issued on a router to verify that EIGRP adjacencies were formed?​

Answer 20

show ip eigrp neighbor

Question 21

Launch PT Hide and Save PT
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.

R1 and R2 could not establish an EIGRP adjacency. What is the problem?​

Answer 21

EIGRP is down on R1.

Question 22

Refer to the exhibit. A network administrator has attempted to implement a default route from R1 to the ISP and propagate the default route to EIGRP neighbors. Remote connectivity from the EIGRP neighbor routers to the ISP connected to R1 is failing. Based on the output from the exhibit, what is the most likely cause of the problem?

Answer 22

The command redistribute static has not been issued on R1.

Question 23

Refer to the exhibit. All networks are active in the same EIGRP routing domain. When the auto-summary command is issued on R3, which two summary networks will be advertised to the neighbors? (Choose two.)

Answer 23

1. 172.16.0.0/16

2. 192.168.10.0/24