EIGRP Questions
Note: If you are not sure about EIGRP, please read our EIGRP Tutorial.
Question 1
Explanation
Below is an example of the “show ip eigrp neighbors” output.
Let’s analyze these columns:
+ H: lists the neighbors in the order this router was learned
+ Address: the IP address of the neighbors
+ Interface: the interface of the local router on which this Hello packet was received
+ Hold (sec): the amount of time left before neighbor is considered in “down” status
+ Uptime: amount of time since the adjacency was established
+ SRTT (Smooth Round Trip Timer): the average time in milliseconds between the transmission of a packet to a neighbor and the receipt of an acknowledgement.
+ RTO (Retransmission Timeout): if a multicast has failed, then a unicast is sent to that particular router, the RTO is the time in milliseconds that the router waits for an acknowledgement of that unicast.
+ Queue count (Q Cnt): shows the number of queued EIGRP packets. It is usually 0.
+ Sequence Number (Seq Num): the sequence number of the last update EIGRP packet received. Each update message is given a sequence number, and the received ACK should have the same sequence number. The next update message to that neighbor will use Seq Num + 1.
In this question we have to check the RTO and Q cnt fields.
Question 2
Explanation
To configure EIGRP for IPv6 we must explicitly specify a router ID before it can start running. For example:
| ipv6 router eigrp 1 eigrp router-id 2.2.2.2 no shutdown |
Notice that EIGRP for IPv6 router-id must be an IPv4 address. EIGRP for IPv4 can automatically pick-up an IPv4 to use as its EIGRP router-id with this rule:
+ The highest IP address assigned to a loopback interface is selected as the router ID.
+ If there are not any loopback addresses configured, the highest IP address assigned to any other active interface is chosen as the router ID
EIGRPv3 also uses the AS number (for example: ipv6 eigrp 1 under interface mode).
Question 3
Explanation
The “show ipv6 eigrp neighbors” command displays the neighbors discovered by the EIGRPv6. Notice that the neighbors are displayed by their link-local addresses.
Question 4
Explanation
The goodbye message is a feature designed to improve EIGRP network convergence. The goodbye message is broadcast when an EIGRP routing process is shutdown to inform adjacent peers about the impending topology change. This feature allows supporting EIGRP peers to synchronize and recalculate neighbor relationships more efficiently than would occur if the peers discovered the topology change after the hold timer expired.
The following message is displayed by routers that run a supported release when a goodbye message is received:
| *Apr 26 13:48:42.523: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 10.1.1.1 (Ethernet0/0) is down: Interface Goodbye received |
Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/ip/configuration/guide/fipr_c/1cfeigrp.html
Note: In this question we should understand “impending”, not “implementing” as there are no correct answers with “implementing” topology change.
Question 5
Explanation
With auto-summary feature is turned on, EIGRP will summary these networks to their classful networks automatically. For example:
+ 172.15.4.0 belongs to class B so it will be summarized to 172.15.0.0
+ 10.4.3.0 belongs to class A so it will be summarized to 10.0.0.0
+ 192.168.4.0 belongs to class C so it will be summarized to 192.168.4.0 (same)
Question 6
Explanation
Split horizon is used in distance vector routing protocols (like RIP, EIGRP) to prevent routing loops by prohibiting a router from advertising a route back to the interface from which it was learned.
Question 7
Explanation
EIGRP provides a mechanism to load balance over unequal cost paths (or called unequal cost load balancing) through the “variance” command. In other words, EIGRP will install all paths with metric < variance * best_metric into the local routing table, provided that it meets the feasibility condition (to prevent routing loop). The feasibility condition states that, the Advertised Distance (AD) of a route must be lower than the feasible distance of the current successor route.
Question 8
Explanation
EIGRP provides a mechanism to load balance over unequal cost paths (or called unequal cost load balancing) through the “variance” command. In other words, EIGRP will install all paths with metric < variance * best_metric into the local routing table, provided that it meets the feasibility condition (to prevent routing loop). The feasibility condition states that, the Advertised Distance (AD) of a route must be lower than the feasible distance of the current successor route.
Question 9
Explanation
From the routing table we learn that network 192.168.10.0/30 is learned via 2 equal-cost paths (192.168.10.9 &192.168.10.5) -> traffic to this network will be load-balancing.
Question 10
Explanation
This is an example of how to configure EIGRP for IPv6:
| interface Serial0/0 no ip address ipv6 address FE80::1 link-local ipv6 address 2010:AB8::1/64 ipv6 enable ipv6 eigrp 1 ! ipv6 router eigrp 1 eigrp router-id 2.2.2.2 no shutdown |
As you can see, EIGRP for IPv6 can only be enabled under each interface -> A is correct.
Under EIGRP process there is a shutdown feature where you can turn on or off -> E is correct.
Question 11
Explanation
These networks will be summarized to the major networks of that class so:
+ 10.4.3.0 belongs to class A -> It will be summarized into 10.0.0.0
+ 172.16.4.0 belongs to class B -> It will be summarized into 172.16.0.0
+ 192.168.2.0 belongs to class C -> It will be summarized into 192.168.2.0 (not changed)
Question 12
Question 13
Question 14
Explanation
The command “ipv6 summary-address eigrp as-numberipv6-address [admin-distance]” can be used to configure a summary aggregate address for a specified interface. We can also configure the administrative distance of that summary aggregate address as well.
Note: The “ipv6 bandwidth-percent eigrp” command configures the percentage of bandwidth that may be used by EIGRP for IPv6 on an interface. By default, EIGRP packets consume a maximum of 50 percent of the link bandwidth.
EIGRP for IPv6 uses the minimum bandwidth on the path to a destination network and the total delay to compute routing metrics. You can use the metric weights command to adjust the default behavior of EIGRP for IPv6 routing and metric computations.
I think Q4 should read EIGRP goodbye messages give notice of “impending” topology changes.
i just see the answers(explanation), where are questions?
where are the questions..??? I am a premium account holder and still cant view information
check CCNA FAQs & Tips for all Questions
pls navigate this page and you will see where they are. this is already spoon feeding guys don’t make a fool of yourself
question 11
If R1 is configured as shown, which three addresses will be received by other routers that are running EIGRP on the network? (Choose three)
R1(config)#router eigrp 103
R1(config-router)#network 10.4.3.0
R1(config-router)#network 172.16.4.0
R1(config-router)#network 192.168.2.0
R1(config-router)#auto-summary
A. 172.16.4.0
B. 10.0.0.0
C. 172.16.0.0
D. 192.168.2.0
E. 192.168.0.0
F. 10.4.3.0
Answer: B C D
Explanation
These networks will be summarized to the major networks of that class so:
+ 10.4.3.0 belongs to class A -> It will be summarized into 10.0.0.0
+ 172.16.4.0 belongs to class B -> It will be summarized into 172.16.0.0
+ 192.168.2.0 belongs to class C -> It will be summarized into 192.168.2.0 (not changed)
but !!! class c is 192.168.0.0 isn’t it??
@9tut, I don’t understand Q11??? and I agree with Wassa..can you explain???
Q2 – Shoulnt it be d
@wassa & @Kiks
Clas C is a /24 then we use the entirely 24 bits 192.168.4.
@osc 👍
hello I am taking my exam on Tuesdays…..what’s there to expect?
CCNA
@wassa , in the case of auto summary …
class A is a /8 — this bit unchanged
class B is a /16– this bit unchanged
class C is a /24– this bit unchanged
All the questions of the CCNA exam last version, can be found here?
please guysss Q10 is wrong
eigrp it’s globally configured not on interface
Please, i’m just seeing the explanations. I’ll like to know the questions are.
Passed exam today.
New Ques. Which codes appear in output of command ‘sh ip eigrp topology’? (choose 2)
A. U-Update
B. S-Static
C. C-Connected
D. A-Active
E. I-inter-area
Answer: A,D
Passed today with 8xx.
Used this site and this dumps https://drive.google.com/open?id=0B5mAFqgydmCzUWJPTTFkemFuQTA
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@mack plxx share new question which were appear in exam
Can someone tell me where can i find the questions related to this explanation ?
Q 10 is wrong….. answer shoul be B and E:
(im and spanish speaker, but i think you will understand)
Globally:
ipv6 unicast-routing ; Habilita enrutamiento en el equipo
ipv6 router eigrp ; Crea el sistema autónomo de EIGRP.
router-id ; Asigna el identificador.
no shutdown ; Habilita el proceso de EIGRP. Por defecto el proceso al crearse se encuentra deshabilitado.
—
Interface
IPv6 eigrp ; Habilita EIGRP en dicha interface.
IPv6 enable ; Asigna una direccion IPv6 cuando no se cuenta con direccione IPv6. Crea una dirección IPv6 Link-local en combinación de IPv6 EUI-64 y la dirección MAC de la interface.
Q10 is correct Eigrpv6 is configured on interface
Hidelmar is absolutely correct. And so is Raptor. AND it also supports shutdown. Welcome to the craziness!
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@hidelmar@cthelite Q10, I guess is correct, because here we are dealing with EIGRP IPv6 and not IPV4. EIGRP on IPv4 is configured in global configuration mode, but not on interface.
EIGRP on IPv6 is also configured in global configuration mode but the difference here is that EIGRP IPv6 also requires to be set on an interface, whereas EIGRP IPv4 does not need any interface configuration.
@9tut Q 10- please rectify-
EIGRP is configured globally and enabled under an interface for IPv6
below is the config-:
R1(config)# ipv6 router eigrp 1 /* global comnfig of EIGRP in IPv6 */
R1(config)# router-id 1.1.1.1
R1(config)# no shut
R1(config)# int g0/0
R1(config-if)# ipv6 eigrp 1 /* enabling EIGRP in IPv6
R1(config)# int g0/1
R1(config-if)# ipv6 eigrp 1 /* enabling EIGRP in IPv6
Option A is wrong as it says it is globally configured and not enabled under an interface.
Option B and E are correct. Please change to the answers.
@CCNAtut: Q.10 answer A means we cannot enable EIGRP IPv6 with the “network …” command under EIGRP process so it is correct.
how i do the lab of the questions i cannot understand :( that how i do it
Hello 9tut,
Question 5 above refers to the network addresses shown by the ‘ip route’ command after ‘auto-summary’. The three networks are summarised in accordance with Class A, Class B and Class C, with no change taking place for the 192.168.4.0 network.
The same question appears in the EIGRP Test. A person is asked to pick three answers. I picked the three as displayed above. When I finished the test I got an incorrect mark for the question. The explanation was that no change would take place for the /24 network. That is true but in terms of the ip route command, the /24 network will appear, along with the /8 and /16. In fact the same layout appears in Q11 above and the three networks are displayed, which would be correct.
The test-answer is wrong. Could it be rectified? It will cause confusion if not corrected.
gj
is this question, “Question 5
What are the address that will show at the “show ip route” if we configure the above statements? (Choose three)
router eigrp 100
network 172.15.4.0
network 10.4.3.0
network 192.168.4.0
auto-summary
A. 10.0.0.0
B. 10.4.3.0
C. 172.15.4.0
D. 172.15.0.0
E. 192.168.4.0
F. 192.168.0.0
” because if the summarization is activated the subnets will be dismantled as follows:
192.168.4.0,
The correct thing is not that they are: 192.168.0.0. Since the summarization is active
his page. Please share the link to questions.
Only answers are displayed. Please share the link to questions.
Can someone explain the question 13 is C?
I think we need first create a process ID, once it is created the system will take the router id from highest loopback ip address or highest ipv4 interface, if not available we need put it manually. I think the answer should be D, but if there is not I assume answer is C because we already create the process id and now need put the router id because there is not loopback or interface configured. The question need to be more clear.
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