3 - Cisco Icnd2 - Eigrp And Igrp

Front 1

EIGRP: What is the address for Hello messages?

Back 1

Multicast: 224.0.0.10

Front 2

EIGRP: What transport protocol is used to send update messages?

Back 2

RTP - Reliable Transport Protocol

Front 3

EIGRP: How are EIGRP routes denoted in the routing table?

Back 3

With a "D"

Front 4

EIGRP: What is the feasible distance?

Back 4

The metric of the best route to a subnet

Front 5

EIGRP: What is the reported distance?

Back 5

The metric calculated on a neighboring router and sent in an EIGRP update

Front 6

EIGRP: What is a successor?

Back 6

The path with the lowest overall feasible distance. Best route to a subnet.

Front 7

EIGRP: What is a feasible successor?

Back 7

The backup path if the sucessor goes down. If the RD from a neighbor is less than the FD for a non-successor route, the route is a feasible successor and does not loop.

Front 8

EIGRP: What algorithm is used to find routes?

Back 8

DUAL - Diffusing update Algorithm

Front 9

EIGRP: What is necessary in discontigouous networks?

Back 9

If you have a discontiguous network, you must turn off route summarization because EIGRP summarizes by classful networks.
CLI: #no autosummary.

Front 10

EIGRP: What metrics are used by default? Possible?

Back 10

Default: bandwidth and delay
Possible additions: reliability and load, but not MTU

Front 11

EIGRP: How to enable load balancing over unequal paths?

Back 11

Set variance. Any path whose FD is less than ( best-path-FD*variance) will be used.

Front 12

EIGRP: High level overview - 3 major steps in process?

Back 12

1. Neighbor discovery
2. Topology Exchange uses multicast (no need for DR and BDR)
3. Routing determines successor and feasible successor. Uses DUAL algorithm if both fail.

Front 13

EIGRP: 3 requirements to become neighbors (Hello)?

Back 13

1. Same AS number
2. Source IP in neighbor's hello must be in same subnet
3. authenication

Front 14

EIGRP: CLI commands to configure?

Back 14

#router eigrp<as number>
#network <ip> <optional wildcard mask>
#network <ip2>…
#no autosummary

Front 15

EIGRP: optional CLI commands to support multiple routes?

Back 15

#variance <n>
#maximum paths <n>

Front 16

EIGRP: interface mode commands to set metrics?

Back 16

#bandwidth <n>
#delay <n>

Front 17

EIGRP: CLI command to stop sending on an interface

Back 17

#passive interface <type number>
(turn off: #no passive interface <type number>)

Front 18

EIGRP: CLI commands to create a key chain

Back 18

#key chain <name>
key 1
#key-string <password> [accept lifetime <time>]
repeat last 3 steps to define additional keys

Front 19

EIGRP: CLI commands to apply keychain to interface

Back 19

#int <type number> or #vlan <x>
#ip authentication mode eigrp <asn> md5
#ip authentication key-chain eigrp <name>

Front 20

Key chain authentication: which key is used?

Back 20

The lowest-numbered currently valid key

Front 21

Compare EIGRP and OSPF: Metrics

Back 21

OSPF uses bandwidth
EIGRP uses bandwith + delay (default)

Front 22

Compare EIGRP and OSPF: route summarization

Back 22

OSFP has no manual summarizaiton. EIGRP allows for manual summarization at any router

Front 23

Compare EIGRP and OSPF: Standard or Proprietary?

Back 23

OSPF is public standard
EIGRP is proprietary

Front 24

EIGRP: IOS command to view the number of EIGRP packets sent and received

Back 24

#show ip eigrp traffic

Front 25

EIGRP: IOS command to set metrics for EIGRP

Back 25

default-metric

Front 26

EIGRP: What is the default administrative distance for an EIGRP summary route?

Back 26

5

Front 27

EIGRP packet types

Back 27

Hello
update
query
reply
ack
(check for others)

Front 28

EIGRP command and mode to configure bandwidth percentage?

Back 28

interface mode
ip bandwidth-percent eigrp <area> <percent>

Front 29

IGRP - What factors are used for the metric?

Back 29

Same as EIGRP (Bandwidth, Delay, Load, Reliability)

Front 30

Show ip route displays the routing table. What are the meanings of the two numbers shown in brackets after the IP address (i.e. [90,2178765])

Back 30

Administrative distance and cost

Front 31

EIGRP: Any update that is sent in the next ___ seconds indicates a topology change.

Back 31

Trick question. EIGRP only sends updates when the topology changes, so every update represents a topology change.