STEP BY STEP CONFIGURING A CISCO ROUTER

 

First of all  you have to under stand the relevant modes before we start configuring a cisco router. 

The basic CLI modes that we will be referring below are as following:

Router>  <– User EXEC Mode
Router#  <– Privileged EXEC mode
Router(config)#  <– Global Configuration Mode
Router(config-if)# <– Interface Configuration Mode
Router(config-line)# <– Line Configuration Mode

NB:
- moving from User EXEC Mode to  Privileged mode you have to issue the  "enable" command after the > sign. 

- Moving from Privileged Mode to Global configuration mode you have to issue the " conf t " command after  the # sign

- "exit" command takes you back to the previous mode  and  " wr mem" writes the commands to memory.

SO LET US START. 

1. In the first place we have to give the router a name following the steps below: 

Router> en
Router# conf t
Router# hostname Spider-router1
Spider-router1#

2. Setting enable secret and telnet password:

Spider-router1# conf t
                       #enable secret  Uganda4
                       #login 

                       #line vty 0 4
                       #Password Uganda5 

In this case ,  Uganda4 is the secret password that protects your terminal and Uganda5 is the password required to access the router remotely from the network. 

 

3. We are going to assign ip address to the Interfaces. 

First we have to issue the command # ip int bri       to see all the interfaces we have and also see if they are Gigabit or Ethernet. 

steps to configure interfaces are as follows :  

A. Setup the LAN Interface GE0/0 ( Connects to the local network)

Spider-Router1# conf t
Spider-Router1(config)# interface GigabitEthernet 0/0
Spider-Router1(config-if)# ip address 192.168.1.20 255.255.255.0
Spider-Router1(config-if)# no shutdown
Spider-Router1(config-if)# exit

- I assume GigabitEthernet 0/0 interface is what we have dedicated as our LAN interface.  The straight through cable from this this interface will be running up to your  LAN switch that connects all your computers. 

B. Setup the WAN Interface ( connects to External network such as Internet service provider) 

Spider-Router1# conf t
Spider-Router1(config)# interface GigabitEthernet 0/1
Spider-Router1(config-if)# ip address 10.10.10.1 255.255.255.252
Spider-Router1(config-if)# no shutdown
Spider-Router1(config-if)# exit

- GigabitEthernet 0/1  is the interface that connects to the Service provider equipment and it only  subnet defined only accepts two ip addresses for security reasons. 

 C . Adding Static and Dynamic routes in the router to forward traffic from one network to
       another.

The Router’s main purpose is to find the best route path towards a destination network and forward packets according to the best path.

There are two main ways a router knows where to send packets. The administrator can assign static routes, or the router can learn routes by using a dynamic routing protocol.

For simple network topologies, static routing is preferred over dynamic routing. 

The best way to understand static routing is following the following order while in global Configuration Mode:

Spider-Router1(config)#  ip route [destination network] [subnet mask] [gateway ip]

ACTUAL ROUTING CONFIGURATION: 

Spider-router1(config)#  ip route 20.20.20.0 255.255.255.0 10.10.10.2

The command above tells the router that network 20.20.20.0/24 is reachable via gateway address 10.10.10.1

Another popular static route that we usually configure on Internet Border routers is the default static route:

My-Router(config)#  ip route 0.0.0.0 0.0.0.0 10.10.10.2

The default static route above instructs the router to send ALL packets that the router does not have a more specific route entry to gateway address 10.10.10.2  which is probably the  ISP gateway address).

 TO SAVE YOUR CONFIGURATIONS:

Spider-Router1(config)# exit
Spider-Router1# copy running-config startup-config 

or simply type :  wr mem  to save configurations.

- You can display your current configuration to verify your settings as following:

Spider-Router1# show running-config

or simply type :  sh run  

 NEXT:  CONFIGURING NAT  ON CISCO ROUTER:

 

PROMOTING A WINDOWS SERVER 2016 PC TO A DOMAIN CONTROLLER

Step 1 - Click on "Start" button.

Step 2 - Click on "Server Manager".

Step 3 - Click on "Add roles and features".

Step 4 - Click on "Next".

Step 5 - Keep selected "Role-based or feature-based installation" and click on "Next".

Step 6 - Select/Verify the server name and IP address, then click on "Next".

Step 7 - Locate "Active Directory Domain Services" and click the check box.

Step 8 - Click on "Add Features".

Step 9 - Locate "DNS Server" and click the check box.

Step 10 - Click on "Add Features".

Step 11 - Confirm the Tick marks and click on "Next".

Step 12 - Click on "Next".

Step 13 - Click on "Next".

Step 14 - Click on "Next".

Step 15 - Click on the check box "Restart the destination server automatically if required".

Step 16 - Click on "Yes".

Step 17 - Click on "Install".

Step 18 - Wait for some time until installation completes.

Step 19 - Click on "Promote this server to a domain controller".

Step 20 - Click on "Add a new forest".

Step 21 - Type root domain name and click on "Next".

Step 22 - Choose appropriate "Forest and Domain functional level" from drop down menu and type "Directory Services Restore Mode (DSRM) password".

Step 23 - Click on "Next".

Step 24 - Click on "Next".

Step 25 - Verify the NetBIOS name assigned to the domain and click on "Next".

Step 26 - Click on "Next".

Step 27 - Click on "Next".

Step 28 - Click on "Install".

Step 29 - Wait for some time until installation completes and system restarts.

Step 30 - Verify domain name on System Information window.