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 description 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.