3-8: 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

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

Answer 3

router configuration mode

Question 4

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 4

an access list that is blocking advertisements from other networks

Question 5

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

Answer 5

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

Question 6

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 6

ip bandwidth-percent eigrp 100 75

Question 7

What is a characteristic of manual route summarization?

Answer 7

reduces total number of routes in routing tables

Question 8

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

Answer 8

passive-interface

Question 9

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

Answer 9

show ip eigrp neighbor

Question 10

You would use what command to verify auto summarization?

Answer 10

show ip protocols

Question 11

What interface discards any packets received?

Answer 11

Null0

Question 12

True / False: You must first configure a Null0 interface before you may use it?

Answer 12

False

Question 13

EIGRP does not use the same command to propagate default routes, it uses what command instead?

Answer 13

redistribute static

Question 14

You see a route in your routing table that starts with “D*EX” what the heck does that even mean?

Answer 14

• D – This route was learned from an EIGRP DUAL
• • – This route is a candidate for a default route.
• EX – External route, in this case a static route.
• 170 – The AD of an external EIGRP route.

Question 15

By default, EIGRP uses up to ____% of bandwidth for EIGRP info.

Answer 15

50%

Question 16

True / False: You would use the command “ip hold-interval eigrp “ to change the hold timer?

Answer 16

False, the command is hold-time, not hold-interval

Question 17

The default EIGRP load balancing is on up to _ equal-cost paths.

Answer 17

4

Question 18

What command allows EIGRP to balance traffic across routes with different metrics?

Answer 18

variance

Question 19

What does it mean if your Variance level is 1?

Answer 19

Only routes with the same metric are installed.

Question 20

What does it mean if your Variance level is 1?

Answer 20

Only routes with a metric less than 2x the successor.