What two actions does a router take upon having EIGRP enabled on an interface? 1. Sends multicast hello messages out the interface





2. Advertises the interface's subnet

With EIGRP, what happens if you try to enter a network statement with a specific address (ex: 10.1.1.1) and a wildcard (0.0.255.255)? It ORs the address to 10.1.0.0 & 0.0.255.255

Which two commands list the interfaces that have EIGRP enabled? show ip eigrp interfaces

show ip protocols

What are the 3 steps for EIGRP to add routes to the routing table? 1. Neighbor Discovery

2. Topology Exchange

3. Choose Routes

Which protocol do EIGRP updates use? Reliable Transport Protocol (RTP)

What are the default EIGRP timers? LAN, P2P, or High BW NMBA:

5 & 15





Low BW NBMA:

60 & 180

Configure the hello interval & hold time for an EIGRP AS 100-enabled interface to 3 & 10 seconds ip hello-interval eigrp 100 3

ip hold-time eigrp 100 10

Will the IOS allow you to configure an EIGRP hold time that is shorter than the hello interval? Yes

Configure every EIGRP-enabled interface (AS 100) to be passive by default passive-interface default

What are the 6 requirements for a successful EIGRP neighborship? - IP Connectivity

- Same Subnet

- Not Passive

- Same ASN

- Successful Authentication

- Matching K-values

What are the 3 requirements for a successful OSPF neighborship that EIGRP doesn't have? - Matching Timers

- Matching MTU

- Unique Router IDs

List all 5 EIGRP K-values K1: Bandwidth

K2: Load

K3: Delay

K4: Reliability

K5: MTU





Enable the EIGRP metric factors Bandwidth, Delay, & Reliability metric weights 0 1 0 1 1 0

What are 5 benefits of using EIGRP? 1. Feasible Successors

2. Simple Configuration

3. Flexible Summarization

4. Unequal Cost Load-Balancing

5. Less CPU Intensive

Define "Reported Distance" & "Feasible Distance" Reported Distance:

The distance from the router's neighbor to the network in question.





Feasible Distance:

The distance from the router itself to the network in question.

Define "Successor" & "Feasible Successor" Successor:

The route with the lowest Feasible Distance to a given network.





Feasible Successor:

Routes with an RDs that are lower than the FD of the successor.



List & Define the 5 types of EIGRP packets Hello: Forms Relationships





Update: Sends Updates





Query: Asks about Routes





Reply: Response to a Query





ACK: Acknowledge the Update, Query, & Reply Messages

What is one unintended side effect of changing the auto summarization configuration in EIGRP? Neighborships drop

What does the "H" (Handle) column in "show ip eigrp neighbors" represent? The order that you formed neighborships in.

What does the "SRTT" column in "show ip eigrp neighbors" reprsent? The round-trip delay, in milliseconds.

How many successors can be added to the routing table by default? 4

Is there a difference between the terms "Reported Distance" (RD) & "Advertised Distance" (AD)? There is no difference

When is an EIGRP route considered to be in "passive" state? When DUAL is not executing any computation to discover the possible alternative paths.









When is an EIGRP network considered to be fully converged? When all routes are in passive state

Display the EIGRP topology table with the inclusion of non-successor routes show ip eigrp topology all-links

What are 2 major solution to excessive EIGRP querying? Route Summarization & Stub Routing

What are the default Administrative Distances for the 3 EIGRP route types? Summary - 5

Internal - 90

External - 170

In router configuration mode, configure an EIGRP stub router with default parameters. eigrp stub

List all 6 EIGRP stub paramters





Place a "*" next to the option that cannot be combined with others. - receive-only*

- leak-map

- connected

- static

- summary

- redistributed

Verify which of your EIGRP neighbors are stubs, and which types of routes they are advertising show ip eigrp neigbors detail

What is one unintended side effect of configuring an EIGRP stub? Neighborships Drop

Disable split horizon on an EIGRP AS 100-enabled interface. no ip split-horizon eigrp 100

Does disabling split horizon cause EIGRP neighborships to drop? No

Does configuring a summary address cause EIGRP neighborships to drop? No

On an EIGRP AS 100-enabled interface, configure a summary route for 10.0.100.0/22 ip summary-address eigrp 100 10.0.100.0/22

What change does a router make to its local routing table upon configuring an EIGRP summary route? Adds the summary route to its own table pointing to "Null0" with an AD of 5?

Where in an EIGRP routing table will you see an AD of 5? Only on the a local summary route pointing to "Null0"

What are the respective routing table codes for EIGRP internal & external routes? D





D EX

Enter router configuration mode & change the administrative distance for external EIGRP routes to 200; leave all other route types at their default value. distance eigrp 90 200

Will changing administrative distances in router configuration mode cause EIGRP neighborships to bounce? Yes

Must the routing table be cleared for an EIGRP administrative distance change to take effect? No

Are EIGRP administrative distances advertised, or are they locally-significant only? Locally Significant

Verify whether or not EIGRP automatic summarization is enabled show ip protocols

Verify whether or not any EIGRP manual summarization has been configured show ip protocols

Verify the EIGRP K-value configuration show ip protocols

List 5 benefits of route summarization - Smaller Routing Tables

- Smaller Routing Updates

- Greater Security

- Less Flapping-Link Updates

- Less EIGRP Queries

Which EIGRP stub parameters are enabled by default? - Connected

- Summary

What happens if you configure two connected EIGRP neighbors as stubs? An adjacency will not form.

What severity level is the EIGRP K-value mismatch log message? 5

What is the highest weight you can assign an EIGRP K-value? 255

What is EIGRP's default bandwidth usage? 50%

On interface se2/0, change the bandwidth usage for EIGRP AS 100 to 200% ip bandwidth-percent EIGRP 100 200

What is the highest EIGRP AS number? 65535

Which configuration level is EIGRP authentication configured at? Interface

Apply the authentication keychain "CCNP" to an EIGRP-enabled interface ip authentication mode eigrp 100 md5

ip authentication key-chain eigrp 100 CCNP

What is the maximum variance multiplier? 128

Change the number of successors that can be added to the routing table to 8. maximum-paths 8

Change the EIGRP Router ID for AS 100 to 1.1.1.1 eigrp router-id 1.1.1.1

What does the RTQ field in the EIGRP neighbors table represent? The amount of time the router will wait before sending a packet from the retransmission queue.

Debug EIGRP Hello Packets debug eigrp packets hello

What must you add to the "frame-relay map" command in order for multicast hello packets go out? The "broadcast" keyword

Show EIGRP traffic statistics show ip eigrp traffic

In router configuration mode, disable logging for neighbor state changes no eigrp log-neighbor-changes

Which IOS version makes "no auto-summary" a default? IOS 15.0

Disable EIGRP Load Balancing maximum-paths 1

If the variance command is changed to a value greater than 1, will unequal EIGRP paths be load-balanced proportionally by default? Yes

Is there a limit on how many feasible successors can be added to an EIGRP topology table? If so, what is its default value? There is no limit

Configure an router to participate in EIGRP but not to advertise any routes eigrp stub receive-only

Configure 192.168.0.11 as a static neighbor on interface fa0/0 neighbor 192.168.0.11 fa0/0

Is Split-Horizon disabled by default on Frame-Relay physical interfaces? Apparently yes

What are two ways you can propagate a default route in EIGRP? 1. Create a static route & redistribute it





2. Use the "ip default-network" command in global configuration mode, pointed to a classful network.

For EIGRP AS 100, disable EIGRP network advertisements going out interface fa0/0 without configuring it to be passive. access-list 5 deny any

router eigrp 100

distribute-list 5 out fa0/0

Verify that a distribute list has been applied to an EIGRP interface show ip protocols

Which 3 tools can a distribute list refer to? - ACL

- Prefix List

- Route Map

When matching an distribute list to an ACL, if a ____ statement is matched, the route is advertised. permit

When matching a distribute list to an ACL, if a ____ statement is matched, the route is filtered. deny

What happens if you configure "distribute-list 2 out" without referencing an interface? The distribute list is applied to all EIGRP interfaces

Create an EIGRP distribute list matching the prefix list "CCNP" distribute-list prefix CCNP

What is the default EIGRP metric calculation? 256(10,000,000 / least bandwidth in kbps) + 256(cumulative delay/10)