Icnd2

Front 1

Show CDP Neighbor detail

Back 1

Device name
IP Address
Platform
Interface

Front 2

Show VLAN/show vlan brief

Back 2

Lists VLAN # Name Status Ports

Front 3

Show VTP status

Back 3

VTP OPERATING MODE| AUDIT LOG| CONFIG REVISION

Front 4

Show Spanning-Tree

Back 4

q

Front 5

Show Mac-Address-table

Back 5

q

Front 6

Show Interface trunk

Back 6

Lists Port# Encapsulation STATUS Mode

Front 7

Show Commands Mnemonic

Back 7

Southern - Sh Spanning-Tree
Vermont - Sh VLAN
Means - Sh Mac-Address-Table
Its - Sh Int Trunk
Very - Sh VTP Status
Cold - Sh CDP neighbor detail

Front 8

NAT
WAN

Back 8

to know

Front 9

Wildcard Mask Shortcut

Back 9

INCREMENT - 1

Front 10

EIGRP METRIC

Back 10

Bandwidth
Delay

Front 11

Configuring EIGRP

Back 11

Router(config)# Router eigrp [AS#]*
*AS# must be same on all routers
Router(config-router)#network [network]
Router(config-router)#no auto-sum

Front 12

EIGRP Route status

Back 12

Passive ''P'' Good (route is working)

Active "A" Bad (search. for good route)

Front 13

EIGRP

Routes 2 types

Back 13

Successor (Primary) Route
(stored in Topology and Routing)
Feasible (Backup) Successor Route
''next best'' (Topology table)

Front 14

EIGRP
Speed

Back 14

Fast Converge
VLSM

Front 15

OSPF

Back 15

Vendor neutral
Link State
SPF Algorithm

Front 16

OSPF facts

Back 16

Router ID = # by which router is known
Highest IP of any active loopback good = default

If no loopback interface = Highest IP address on active int. at the moment when OSPF process started

Hierarchical

Front 17

LSA used

Back 17

Link State Advertisements

Front 18

OSPF cost calculation

Back 18

100,000,000/Bandwidth in BPS

Front 19

Frame Relay = LMI
what are 3 types?

Back 19

1) Cisco (*default*)
2) ANSI
3) Q933a

Front 20

Frame Relay encapsulation

Back 20

IETF (Open Std)
Cisco (default)

Front 21

What do Sub-intfs correct?

Back 21

Resolve Split Horizon Issue

Front 22

Frame Relay

Back 22

include BROADCAST command to allow ROUTING in Frame Relay

Front 23

What do Classful Routing Protocols do?

Back 23

"- summarize networks to their major network boundaries (A, B, or C).
- Do not carry subnet mask info in their routing table updates."

Front 24

What are 2 Classful routing protocols?

Back 24

RIPv1 and IGRP

Front 25

what 2 environments CANT Classful routing protocols adapt in?

Back 25

"- discontigous networks
- VLSM networks"

Front 26

What are 4 Classless routing protocols?

Back 26

"RIPv2
EIGRP
OSPF
BGP"

Front 27

what are the 2 ways RIPv2 prevents routing loops?

Back 27

"- split horizon
- measures of hold-down timers"

Front 28

How does RIPv2 get send out its routing table updates?

Back 28

multicasts its updates using the multicast address 224.0.0.9

Front 29

what are the 6 metrics of EIGRP?

Back 29

"-Hops
-Load
-Bandwidth
-Reliability
-Delay
-MTU"

Front 30

what are routing table updates sent on EIGRP?

Back 30

only when changes have been made on the network, not periodic.

Front 31

When routing table updates are sent in EIGRP, What is included in the update?

Back 31

only routes that have changed are sent

Front 32

When routing table updates are sent in EIGRP, Who is included in the update?

Back 32

only to the routers that need to learn the updates.

Front 33

"what is the first step to configure EIGRP?
(also include command)"

Back 33

"You have to turn on the EIGRP process
command:
router#router eigrp [proess-id]"

Front 34

Give the command to configure EIGRP.

Back 34

"router(config)#router eigrp 1
(config-router)#no auto-sum
router(config)#network 192.168.20.0
router(config)#network 172.16.0.0"

Front 35

what does EIGRP stand for?

Back 35

Enhanced Interior Gateway Routing Protocol

Front 36

what does OSPF stand for?

Back 36

Open Shortest Path First

Front 37

What kind of routing protocol is OSPF

Back 37

Link-State Protocol

Front 38

What are 3 supported benifits offered by OSPF

Back 38

"- classless routing
- VLSM support
- Authentication"

Front 39

What is an "area"?

Back 39

the portion of a network within which LSAs are contained

Front 40

what is "cost" when refering to OSPF?

Back 40

"OSPFs default metric
Cost = (10^8 / bandwidth of the link)"

Front 41

What is the Link speed and Default Cost of T1?

Back 41

"Speed: 1.544Mbps
Cost: 64"

Front 42

What is the Link speed and Default Cost of E1?

Back 42

"Speed: 2.048Mbps
Cost: 48"

Front 43

what is the purpose of a Backup Designated Routers?

Back 43

to take over if Designated Routers fails

Front 44

How is a DR elected?

Back 44

"via the Hello process
(Hello packets contain an OSPF router ID)"

Front 45

what are the 3 OSPF router ID options when electing a DR?

Back 45

"- highest IP address configured on a loopback interface
- highest IP address on an active physical interface
- the ID set using the ""ospf router-id [ip address]"" command"

Front 46

what algorithm does OSPF use to find shortest path first?

Back 46

Dijkstra's Shortest Path First Algorithm

Front 47

what is the commands to configure a single-area OSPF?

Back 47

"(config)#router ospf 1
(config-router)#network 172.20.0.0 0.0.255.255 area 0
(config-router)#exit"

Front 48

How does the Distance-Vector Routing Protocol work?

Back 48

Periodically broadcasts entire routing table to neighbor routers

Front 49

How does the Link-State Routing Protocol work?

Back 49

mulitcast links to all routers in the autonomous system on startup and all other routing table updates contain only updated routers.

Front 50

what is a Hold-Down Timer?

Back 50

stops routing loops by allowing router to place route in a state where it ill not accept any changes to that router.

Front 51

what is Split Horizon?

Back 51

"- prevent routing loops
- router will not send updates for a route via an interface from which it originally received knowledge of that route."

Front 52

what is the command to view the routing tables

Back 52

show ip route

Front 53

Is it better to have a Higher or Lower Administrative Distance?

Back 53

Lower the number, the more reliable

Front 54

what is the default metrics for IGRP?

Back 54

Bandwidth and Delay

Front 55

what are the 6 metrics for IGRP?

Back 55

- hop
- load
- bandwidth
- reliability
- delay
- MTU

Front 56

What are 3 benefits of a Static Route configuration?

Back 56

- Less Bandwidth
- Less Memory
- Less CPU resources

Front 57

Provide the layout of the static route command.

Back 57

ip route [destination network address] [destination subnet mask] [ip address of next hot interface] [administrative distance]

Front 58

What algorithm does OSPF use to calculate metric?

Back 58

Dijkstra SPF algorithm

Front 59

how is it determined which non-root bridge with the same cost to the root bridge will be the "designated port" if the two non-root switches are connected together?

Back 59

Switch with the lowest BID will get the designated port.

Front 60

port transition from blocking to forwarding state time?

Back 60

30-50 secs.