CCNA1-ITNv7 - Module 10 - Basic Router Configuration

welcome to my introduction to networking

course typically abbreviated

ITN this will be for the CCNA version 7

curriculum module 10 is about basic

router

configuration so in this module we're

looking at how to configure basic router

settings looking at the interfaces and

setting up the default gateways on

device

so let's jump right on in configuring

the initial router settings just like a

switch we uh jump in we configure a host

name from the global configuration

you'll notice that will be the device

name and we'll have config in

Brackets from there we will be typing in

host name space whatever the name you

want it to be if we want to enable a

password

this is what secures the privileged EXA

mode that is created by the enable

section what you would do is enable

secret and then put whatever password

you

want if we want to secure the user exact

mode when we console in or if we're

using a virtual

terminal we would then set up either a

line console zero or a line vty

BTY are the virtual

Terminals and from there you'd be

setting a password using the password

space whatever the password you want it

to be and then you also want to say when

do you want it to prompt the user and we

want the users to be prompted at login

so the second line would be

login with a line vty you can

also have uh specific

inputs that are required you could do a

secure shell SSH or you can allow tet or

both keep in mind tnet everything is

still plain text SSH everything is

encrypted but additional setup is needed

when we're doing

SSH with the enable and the password you

can actually set an enable password

without using secret however secret

Actually hashes the password you'll

notice with the line connection line

console and line vty both the passwords

are using just a plain text password we

can encrypt the password by enabling the

service for password encryption to do

that we type service password encryption

that will encrypt our passwords

lastly we need to set a banner a banner

is going to be a message that will be

displayed when the user logs in you do

that by typing Banner motd that is short

form message of the day a special

character write the message and you have

to end with the same special character

you cannot use different starting and

different special characters they have

to be the

same so how does that look in

practice here we have a host name R1 we

have a a password of class for our line

password we have a password of

Cisco those will all be plain text

except for the enable password until we

turn on the services that encrypt our

passwords and then lastly we have our

Banner message

and to make sure we understand this we

have a packet tracer lab moving on how

do we configure the interfaces routers

and switches have multiple interfaces so

first of all we need to know what they

are you could do a show IP interface

brief and that will show us the

interfaces that has to be done at the

privilege exec mode just the pound sign

show IP interface brief will give you

all of the

interfaces once you know how many

interfaces you have you can configure

those interfaces you configure the

interface by doing

interface the type and number of the

interface you can list a description if

you'd like you have the ability to give

it an ipv4 and or an IPv6 address and

you should turn on the interface with a

no shutdown a shutdown command turns off

the interface no shutdown activates the

interface so in real practice if we are

programming the gig z0000

interface that would be the gigabit

interface on the Lan

side that is how we would do it we would

give the IP

address we should give a descript ion so

we know what it

is and we should turn it on in this

example we're also enabling an IPv6

address if we wanted to configure the

gigabit 001 interface we could do that

as well that is the link between R1 and

R2 hence the description we give it an

IP address we give an IPv6 address and

we also say no shutdown to turn it on

so how do we verify these interfaces are

up and running show IP interface

brief as long as the okay is yes and the

status is yes or up we are good if the

status is set to administratively down

that means that we didn't issue the no

shutdown command if the protocol is down

but the status is not administratively

down it is typically a layer one issue a

physical networking

issue if you want to look at the IPv6

version you would do a show IPv6

interface brief and that will give you

the IPv6 equivalent of the interface

brief

communication all right so how do we

look at certain commands show commands

specifically if we're looking at

interfaces

show IP interface brief is going to be

the most common if we're looking at

routing information it'll be show IP

route we could look at detailed

information by looking at show

interfaces or show IP

interfaces those will give us very

specific statistics on those

interfaces all of these have a IPv6

equivalent command as

well so going back here's how we would

do our show IP interface brief again it

is important to realize these are our

basic show commands for our verification

for interfaces if we are doing a route

if we're looking for routing information

show IP route we will actually show

better breakdowns of these tables in a

later

lecture but this is how a routing table

looks this is what the router will use

to make the routing decisions it will

use this table to figure out how to

forward packets

appropriately show interfaces you can

show all interfaces or you can be

specific on one interface this will give

you a detailed breakdown of that

interface the MAC address the IP address

the MTU the reliability the transmit and

receive load if there is ARP information

if there's anything being queried if

there's anything being overloaded this

is what's going to tell

you show IP interface will also give you

the uh interface if it's up if the blind

protocol is up this will give you more

detailed on specific functionality

notice this does not give you

reliability or transmit and receive

loads

so show interface will give you transmit

and receive loads show IP interface will

give you specific on protocol

functionality again there's IP

equivalent for IPv6 show IPv6 interface

we show you if it's up if it's down and

if there's any multicast groups

associated with it and then the rest

will be protocols

moving on how do we configure an

ipv for default

gateway remember the default gateway is

the exit out of our

landan so here we have two interfaces on

the router gig 000000 and gig

001 if we actually want two different

networks we could do that one network on

gig 0000 one network on gig

001 and to communicate between these two

networks it has to go to a layer 3

device the layer 3 device is going to be

our router and again the default gateway

is our exit point for our Network again

it's going to be the

router switches must have a default

gateway if they're going to be remotely

managed at all the switches should be

able to pass frames to the router

assuming the in device is actually

sending it to remote

host the switch should also have a

default gateway just in case the switch

is not sure how to forward it

on how do we configure an IP default

gateway on a switch from the global

configuration we issue a

IP default gateway command and that is

IP default gateway space the IP address

of the

Gateway for whatever reason we have a

bug in our PowerPoints that list

the graphic not being completed as of

yet

we do have a packet tracer on looking at

router information configuring the

router and verifying the

configuration we also have another

Packet Tracer at looking at verifying

Network documentation implementing

Solutions and testing and verifying

certain problems looking at the default

gateway and that is it for this

chapter there are videos if you wish to

view them in nead

overall we also do have another lab

looking at basic device configuration

both a router and a

switch we also have a basic U lab

setting up again switch and a router

setting up basic uh device functionality

host name Banner enable things of that

nature all right so summary what did we

learn we looked at how to navigate

between user and exec mode and Global

configuration mode

we looked at basic configuration how to

set a host name how to set an enable

password how to set line passwords how

to set a banner we also looked at how to

set interfaces basic configuration for

interfaces and how to turn them on again

we turn them on with a no shutdown

command we also looked at how to set a

default gateway and the purpose of a

default gateway any questions or

concerns please reach out thank you