EIGRP Flashcards
Refer to the exhibit. EIGRP is configured on all routers in the network. On the basis of the output provided, which statement is true?
A. Because the key chain names do not match, router R1 will not be able to ping routers R2 and R3
B. Because the key strings do not match, router R1 will not be able to ping routers R2 and R3.
C. Because authentication is misconfigured on interfaces Gi0/0 and Gi0/1 on router R2, router R1 will not be able to ping routers R2 and R3.
D. Because autosummarization needs to be turned on for EIGRP on all routers, router R1 will not be able to ping routers R2 and R3.
E. Router R1 will be able to ping routers R2 and R3.
Router R1 will be able to ping routers R2 and R3.
Which two statements are true about EIGRP manual summarization? (Choose two.)
A. Manual summarization is configured on a per interface basis.
B. Manual summaries can be configured with the classful mask only.
C. When manual summarization is configured, autosummarization is automatically disabled by default.
D. The summary address is assigned an administrative distance of 10 by default.
E. The summary address is entered into the routing table and is shown to be sourced from the Null0 interface.
A. Manual summarization is configured on a per interface basis.
E. The summary address is entered into the routing table and is shown to be sourced from the Null0 interface.
Which is the correct command format to configure EIGRP summary route?
A. ip auto-summary as-number address mask
B. ip summary-address as-number address mask
C. ip auto-summary eigrp as-number address mask
D. ip summary-route eigrp as-number address mask
E. ip summary-address eigrp as-number address mask
E. ip summary-address eigrp as-number address mask
Which is the most effective technique to contain EIGRP queries?
A. route summarization
B. configuring route filters
C. using a hierarchical addressing scheme
D.establishing separate autonomous systems
A. route summarization
After you determine the minimum routing requirements, you can make EIGRP more scalable. Two of the best options are the following:
- Configure route summarization using the ip summary-address eigrp command on the outbound interface of the appropriate routers.
- Configure the remote routers as stub EIGRP routers. Summarizing routes limits the queries scope by limiting a routers knowledge of networks subnets. If a subnet goes down, queries go only as far as the routers that have knowledge of that subnet.
Identify three characteristics of EIGRP feasible successors? (Choose three.)
A. A feasible successor is selected by comparing the advertised distance of a non-successor route to the feasible distance of the best route.
B. If the advertised distance of the non-successor route is less than the feasible distance of best route, then that route is identified as a feasible successor.
C. If the successor becomes unavailable, then the feasible successor can be used immediately without recalculating for a lost route.
D. The feasible successor can be found in the routing table.
E. Traffic will be load balanced between feasible successors with the same advertised distance.
A. A feasible successor is selected by comparing the advertised distance of a non-successor route to the feasible distance of the best route.
B. If the advertised distance of the non-successor route is less than the feasible distance of best route, then that route is identified as a feasible successor.
C. If the successor becomes unavailable, then the feasible successor can be used immediately without recalculating for a lost route.
A network administrator is troubleshooting an EIGRP configuration across a discontiguous network. What must the administrator do to ensure the routers have the correct routing information?
A. Nothing, EIGRP supports discontiguous networks by default.
B. The administrator must disable automatic summarization with the command no auto-summary.
C. The administrator must enable manual summarization with the command ip summary-address.
D. The administrator must enable classless routing with the command ip classless.
E. The administrator must specify a default network with the command ip default-network.
B. The administrator must disable automatic summarization with the command no auto-summary.
What is the purpose of the eigrp stub configuration command?
A. to increase scalability by limiting the EIGRP query range
B. to reduce the size of the routing table by blocking the D EX (External EIGRP) routes into the EIGRP stub router
C. to reduce the convergence time by enabling the EIGRP stub router to propagate the EIGRP queries from the EIGRP hub router
D. to reduce the convergence time by enabling the EIGRP stub router to also perform query requests to the EIGRP hub router
A. to increase scalability by limiting the EIGRP query range
The EIGRP Stub Routing feature improves network stability, reduce resources utilization, and simplifies stub router configuration.
Stub routing is commonly used in a hub and spoke network topology. You need to configure the distribution (hub) and remote (spoke) routers to use EIGRP, and only the remote router as a stub. Only specified routes are propagated from the stub router. The router responds to queries for summaries, connected routes, redistributed static routes, external routes, and internal routes with the message “inaccessible”. A stub router will send a special peer information packet to all neighboring routers to report its status as a stub router.
Any neighbor that receives a packet informing it of the stub status will not query the stub router for any routes, and a router that has a stub peer will not query that peer. The stub router will depend on the distribution router to send the proper updates to all peers.
Which command displays statistics on EIGRP hello, updates, queries, replies, and
acknowledgments?
A. debug eigrp packets
B. show ip eigrp traffic
C. show ip eigrp topology
D. show ip eigrp neighbors
B. show ip eigrp traffic
A network administrator would like to configure an EIGRP router as a stub router that
advertises directly connected and summary routes only. What command must the
administrator issue to accomplish this?
A. eigrp stub
B. eigrp stub connected
C. eigrp stub summary
D. eigrp stub connected static
E. eigrp stub receive-only
A. eigrp stub
When troubleshooting an EIGRP connectivity problem, you notice that two connected
EIGRP routers are not becoming EIGRP neighbors. A ping between the two routers was
successful. What is the next thing that should be checked? Select the best response.
A. Verify that the EIGRP hello and hold timers match exactly.
B. Verify that EIGRP broadcast packets are not being dropped between the two routers with
the show ip EIGRP peer command.
C. Verify that EIGRP broadcast packets are not being dropped between the two routers with
the show ip EIGRP traffic command.
D. Verify that EIGRP is enabled for the appropriate networks on the local and neighboring
router.
D. Verify that EIGRP is enabled for the appropriate networks on the local and neighboring
router.
Which condition must be satisfied before an EIGRP neighbor can be considered a feasible
successor? Select the best response.
A. The neighbor’s advertised distance must be less than or equal to the feasible distance of
the current successor.
B. The neighbor’s advertised distance must be less than the feasible distance of the current
successor.
C. The neighbor’s advertised distance must be greater than the feasible distance of the
current successor.
D. The neighbor’s advertised distance must be equal to the feasible distance of the current
successor.
The neighbor’s advertised distance must be greater than or equal to the feasible distance
of the current successor.
B. The neighbor’s advertised distance must be less than the feasible distance of the current
successor.
Which statement about a non-zero value for the load metric (k2) for EIGRP is true? Select
the best response.
A. A change in the load on an interface will cause EIGRP to recalculate the routing metrics
and send a corresponding update out to each of its neighbors.
B. EIGRP calculates interface load as a 5-minute exponentially weighted average that is
updated every 5 minutes.
C. EIGRP considers the load of an interface only when sending an update for some other
reason.
D. A change in the load on an interface will cause EIGRP to recalculate and update the
administrative distance for all routes learned on that interface.
C. EIGRP considers the load of an interface only when sending an update for some other
reason.
Your network consists of a large hub-and-spoke Frame Relay network with a CIR of 56 kb/s
for each spoke. Which statement about the selection of a dynamic protocol is true? Select
the best response.
A. EIGRP would be appropriate if LMI type ANSI is NOT used.
EIGRP would be appropriate, because the Frame Relay spokes could be segmented into
their own areas.
C. EIGRP would be appropriate, because by default, queries are not propagated across the
slow speed Frame Relay links.
D. EIGRP would be appropriate, because you can manage how much bandwidth is
consumed over the Frame Relay interface.
D. EIGRP would be appropriate, because you can manage how much bandwidth is
consumed over the Frame Relay interface.
When an EIGRP topology change is detected, what is the correct order of events when
there is a FS? Select the best response.
A. The neighbor adjacency is deleted.The feasible route is used.
DUAL is notified.
Remove all topology entries learned from that neighbor.
B. DUAL is notified.
Remove all topology entries learned from that neighbor.
The neighbor adjacency is deleted.
Routes enter the Active state and the feasible route is used.
C. The neighbor adjacency is deleted.
Routes enter the Active state and the feasible route is used.
DUAL is notified.
Remove all topology entries learned from that neighbor.
D. DUAL is notified.
The neighbor adjacency is deleted.
Remove all topology entries learned from that neighbor.
The feasible route is used.
D. DUAL is notified.
The neighbor adjacency is deleted.
Remove all topology entries learned from that neighbor.
The feasible route is used.
Refer to the exhibit. All EIGRP load balancing parameters are set to their defaults. You want
to use all the routes in the EIGRP topology for IP load balancing. Which two EIGRP
subcommands would you use to accomplish this goal? (Choose two.)
R1#show ip eigrp topology | section 0.0.0.0
P 0.0.0/0 2 successors, FD is 2174976
via 212.50.185.125 (2174976/2169859), Ethernet0/0
via 212.50.185.126 (2174976/2169859), Ethernet0/0
via 212.50.185.65 (2178816/2172416), Ethernet1/0
via 212.50.185.66 (2178816/2172416), Ethernet1/0
via 212.50.185.33 (2180096/2172416), Ethernet1/0
via 212.50.185.34 (2180096/2172416), Ethernet1/0
R1#show up route 0.0.0.0
Routing entry for 0.0.0.0/0 supernet
Known via “eigrp 212”, distance 170, metric 2174976,
candidate default path, type external
Redistributing via eigrp 212
Last update from 212.50.185.126 on Ethernet0/0, 00:00:32
ago
Routing Descriptor Blocks:
* 212.50.185.126, from 212.50.185.26. 00:00:32 ago via
Ethernet0/0
Route metric is 2174976, traffic share count is 1
Total delay is 20200 microseconds, minimum bandwidth is
1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 3/255, Hops 1
212.50.185.125, from 212.50.185.25. 00:00:32 ago via
Ethernet0/0
Route metric is 2174976, traffic share count is 1
Total delay is 20200 microseconds, minimum bandwidth is
1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 3/255, Hops 1
A. traffic-share balanced
B. distance
C. maximum-paths
D. default-network
E. variance
C. maximum-paths
E. variance
