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80 Cards in this Set
- Front
- Back
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 |
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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 |
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Which two commands list the interfaces that have EIGRP enabled? |
show ip eigrp interfaces show ip protocols |
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What are the 3 steps for EIGRP to add routes to the routing table? |
1. Neighbor Discovery 2. Topology Exchange 3. Choose Routes |
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Which protocol do EIGRP updates use? |
Reliable Transport Protocol (RTP) |
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What are the default EIGRP timers? |
LAN, P2P, or High BW NMBA: 5 & 15 Low BW NBMA: 60 & 180 |
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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 |
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Will the IOS allow you to configure an EIGRP hold time that is shorter than the hello interval? |
Yes |
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Configure every EIGRP-enabled interface (AS 100) to be passive by default |
passive-interface default |
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What are the 6 requirements for a successful EIGRP neighborship? |
- IP Connectivity - Same Subnet - Not Passive - Same ASN - Successful Authentication - Matching K-values |
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What are the 3 requirements for a successful OSPF neighborship that EIGRP doesn't have? |
- Matching Timers - Matching MTU - Unique Router IDs |
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List all 5 EIGRP K-values |
K1: Bandwidth K2: Load K3: Delay K4: Reliability K5: MTU |
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Enable the EIGRP metric factors Bandwidth, Delay, & Reliability |
metric weights 0 1 0 1 1 0 |
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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 |
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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. |
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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. |
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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 |
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What is one unintended side effect of changing the auto summarization configuration in EIGRP? |
Neighborships drop |
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What does the "H" (Handle) column in "show ip eigrp neighbors" represent? |
The order that you formed neighborships in. |
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What does the "SRTT" column in "show ip eigrp neighbors" reprsent? |
The round-trip delay, in milliseconds. |
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How many successors can be added to the routing table by default? |
4 |
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Is there a difference between the terms "Reported Distance" (RD) & "Advertised Distance" (AD)? |
There is no difference |
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When is an EIGRP route considered to be in "passive" state? |
When DUAL is not executing any computation to discover the possible alternative paths. |
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When is an EIGRP network considered to be fully converged? |
When all routes are in passive state |
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Display the EIGRP topology table with the inclusion of non-successor routes |
show ip eigrp topology all-links |
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What are 2 major solution to excessive EIGRP querying? |
Route Summarization & Stub Routing |
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What are the default Administrative Distances for the 3 EIGRP route types? |
Summary - 5 Internal - 90 External - 170 |
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In router configuration mode, configure an EIGRP stub router with default parameters. |
eigrp stub |
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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 |
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Verify which of your EIGRP neighbors are stubs, and which types of routes they are advertising |
show ip eigrp neigbors detail |
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What is one unintended side effect of configuring an EIGRP stub? |
Neighborships Drop |
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Disable split horizon on an EIGRP AS 100-enabled interface. |
no ip split-horizon eigrp 100 |
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Does disabling split horizon cause EIGRP neighborships to drop? |
No |
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Does configuring a summary address cause EIGRP neighborships to drop? |
No |
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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 |
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What change does a router make to its local routing table upon configuring an EIGRP summary route?
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Adds the summary route to its own table pointing to "Null0" with an AD of 5? |
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Where in an EIGRP routing table will you see an AD of 5? |
Only on the a local summary route pointing to "Null0" |
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What are the respective routing table codes for EIGRP internal & external routes? |
D D EX |
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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 |
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Will changing administrative distances in router configuration mode cause EIGRP neighborships to bounce? |
Yes |
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Must the routing table be cleared for an EIGRP administrative distance change to take effect? |
No |
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Are EIGRP administrative distances advertised, or are they locally-significant only? |
Locally Significant |
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Verify whether or not EIGRP automatic summarization is enabled |
show ip protocols |
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Verify whether or not any EIGRP manual summarization has been configured |
show ip protocols |
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Verify the EIGRP K-value configuration |
show ip protocols
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List 5 benefits of route summarization |
- Smaller Routing Tables - Smaller Routing Updates - Greater Security - Less Flapping-Link Updates - Less EIGRP Queries |
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Which EIGRP stub parameters are enabled by default? |
- Connected - Summary |
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What happens if you configure two connected EIGRP neighbors as stubs? |
An adjacency will not form. |
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What severity level is the EIGRP K-value mismatch log message? |
5 |
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What is the highest weight you can assign an EIGRP K-value? |
255 |
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What is EIGRP's default bandwidth usage? |
50% |
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On interface se2/0, change the bandwidth usage for EIGRP AS 100 to 200% |
ip bandwidth-percent EIGRP 100 200 |
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What is the highest EIGRP AS number? |
65535 |
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Which configuration level is EIGRP authentication configured at? |
Interface |
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Apply the authentication keychain "CCNP" to an EIGRP-enabled interface |
ip authentication mode eigrp 100 md5 ip authentication key-chain eigrp 100 CCNP |
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What is the maximum variance multiplier? |
128 |
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Change the number of successors that can be added to the routing table to 8. |
maximum-paths 8 |
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Change the EIGRP Router ID for AS 100 to 1.1.1.1 |
eigrp router-id 1.1.1.1 |
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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. |
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Debug EIGRP Hello Packets |
debug eigrp packets hello |
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What must you add to the "frame-relay map" command in order for multicast hello packets go out?
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The "broadcast" keyword |
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Show EIGRP traffic statistics |
show ip eigrp traffic |
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In router configuration mode, disable logging for neighbor state changes |
no eigrp log-neighbor-changes |
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Which IOS version makes "no auto-summary" a default? |
IOS 15.0 |
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Disable EIGRP Load Balancing |
maximum-paths 1 |
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If the variance command is changed to a value greater than 1, will unequal EIGRP paths be load-balanced proportionally by default? |
Yes |
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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 |
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Configure an router to participate in EIGRP but not to advertise any routes |
eigrp stub receive-only |
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Configure 192.168.0.11 as a static neighbor on interface fa0/0
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neighbor 192.168.0.11 fa0/0 |
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Is Split-Horizon disabled by default on Frame-Relay physical interfaces? |
Apparently yes |
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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. |
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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 |
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Verify that a distribute list has been applied to an EIGRP interface |
show ip protocols |
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Which 3 tools can a distribute list refer to? |
- ACL - Prefix List - Route Map |
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When matching an distribute list to an ACL, if a ____ statement is matched, the route is advertised. |
permit |
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When matching a distribute list to an ACL, if a ____ statement is matched, the route is filtered. |
deny |
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What happens if you configure "distribute-list 2 out" without referencing an interface? |
The distribute list is applied to all EIGRP interfaces |
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Create an EIGRP distribute list matching the prefix list "CCNP" |
distribute-list prefix CCNP |
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What is the default EIGRP metric calculation? |
256(10,000,000 / least bandwidth in kbps) + 256(cumulative delay/10) |
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Write the metric equation for a path with 1544kbps least-bandwidth, and 20200 usec delay |
256(10,000,000/1544) + 256(20200/10) |