Computer Networking Tutorials

ICT Solutions 2018-12-06 10:40:29

Cisco Certifications

Cisco certifications are one of the famous certifications in networking field.

This is all bout Cisco Certifications for brothers and sisters who are trying to take Cisco exams. If you want to learn, click here.

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ICT Solutions 2018-11-30 15:22:30

Calculating IP Address Version (4)

There are four octet in IPV4. Each octet has 8 bits. So, there are 32 bits in IPV4. IPV4 is based on binary (0, 1) and decimal (0 to 9).

First Octet	Second Octet	Third Octet	Fourth Octet
8 bits	8 bits	8 bits	8 bits
2⁷2⁶2⁵2⁴2³2²2¹2⁰	2⁷2⁶2⁵2⁴2³2²2¹2⁰	2⁷2⁶2⁵2⁴2³2²2¹2⁰	2⁷2⁶2⁵2⁴2³2²2¹2⁰
255.255.255.255	255.255.255.255	255.255.255.255	255.255.255.255

How to become 255.255.255.255 ? As each octet has 8 bit and is based on binary.... 2⁷ = 128, 2⁶= 64, 2⁵= 32, 2⁴= 16, 2³= 8, 2²= 4, 2¹= 2, 2⁰= 1 128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255

		Decimal						=			Binary
1^st Octet		2^nd Octet		3^rd Octet		4^th Octet			1^st Octet		2^nd Octet		3^rd Octet			4^th Octet
192	.	168	.	1	.	0			11000000	.	10101000	.	00000001		.	00000000

Let's explore 192.168.1.0/24.... Network Address = 192.168.1.0 Subnet Mask = 255.255.255.0 Usable IP Addresses = 192.168.1.1 to 192.168.1.254 Broadcast Address = 192.168.1.255

Let's explore 192.168.1.0/25.... 1^nd Network Address = 192.168.1.0 Subnet Mask = 255.255.255.128 Usable IP Addresses = 192.168.1.1 to 192.168.1.126 Broadcast Address = 192.168.1.127 2^nd Network Address = 192.168.1.128 Subnet Mask = 255.255.255.128 Usable IP Addresses = 192.168.1.129 to 192.168.1.254 Broadcast Address = 192.168.1.255

Let's explore 192.168.1.0/26... 1^st Network Address = 192.168.1.0 Subnet Mask = 192.168.1.192 Usable IP Addresses = 192.168.1.1 to 192.168.1.62 Broadcast Address = 192.168.1.63 2^nd Network Address = 192.168.1.64 Subnet Mask = 192.168.1.192 Usable IP Addresses = 192.168.1.65 to 192.168.1.126 Broadcast Address = 192.168.1.127 3^rd Network Address = 192.168.1.128 Subnet Mask = 192.168.1.192 Usable IP Addresses = 192.168.1.129 to 192.168.1.190 Broadcast Address = 192.168.1.191 4^th Network Address = 192.168.1.192 Subnet Mask = 192.168.1.192 Usable IP Addresses = 192.168.1.193 to 192.168.1.254 Broadcast Address = 192.168.1.255 (Note: The Subnet Mask is reverse proportional to host range. The larger the subnet mask, the smaller the host range.)

The following table is formula for Ipv4 addresses (Class C). I've made it when I was in Singapore Polytechnic.

Binary	Decimal	Prefix	Subnet Mask	Count of Networks	Usable IP Range
-	-	/24	255.255.255.0	1	254
2⁷	128	/25	255.255.255.128	2	126
2⁶	64	/26	255.255.255.192	4	62
2⁵	32	/27	255.255.255.224	8	30
2⁴	16	/28	255.255.255.240	16	14
2³	8	/29	255.255.255.248	32	6
2²	4	/30	255.255.255.252	64	2

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ICT Solutions 2018-11-29 14:44:31

About IP Address

The networking devices need IP addresses to communicate with each other on the network. There are two types of IP addresses versions: IP Version 4 (IPv4) and IP Version 6 (IPv6).

IPv4 Address
In IPv4 address, the host can communicate in one of three different ways:

Unicast: The process of sending a packet from one host to an individual hos

Broadcast: The process of sending a packet from one host to all hosts in the network

Multicast: The process of sending a packet form one host to selected group of hosts

In IPv4, the network range is defined by the followings:

Network address: A special network that refers to the network

Subnet Mask The subnet mask is a 32-bit values used with IPv4 address that specifies the network portion of the address to the network device. The subnet mask uses 1s and 0s to indicate which bits of the IPv4 address are network bits and which bits are hosts bits.

Host address: The unicast address assigned to the end device in the network

Broadcast address: A special address used to send data to the all hosts in the network

For Example,

     Network               Network Address        Subnet Mask                Host Range                      Broadcast Address

192.168.1.0/24            192.168.1.0              255.255.255.0             192.168.1.1 to 254                192.168.1.255

192.168.2.0/25            192.168.2.0              255.255.255.128           192.168.2.1 to 126               192.168.2.127


IPv4 Network Classes

Address Classes      First Octet Range         Prefix and Mask            Number of Possible Networks          Number of Hosts
                                                                                            
    A                  1 to 127                /8    255.0.0.0                  126                                16,777,217  

    B                  128 to 191              /16   255.255.0.0              16,382                                 65,534

    C                  192 to 223             /24   255.255.255.0            2,097,159                                254

IPv4 Public and Private Addresses
Although most IPv4 addresses are public addresses designated for use in networks that are accessible on the Internet, there are blocks of addresses used in network that are not accessible on the Internet. These addresses are called private addresses.

The private address blocks are:

Class A 10.0.0.0/8 (10.0.0.0 to 10.255.255.255)

Class B 172.16.0.0/12 (172.16.0.0 to 172.31.255.255)

Class C 192.168.0.0/16 (192.168.0.0 to 192.168.255.255)

Multicast Addresses       224.0.0.0/4 (224.0.0.0 to 239.255.255.255)
                The multicast transmission is designed to conserve the bandwidth of IPv4 network. It reduces the traffic by allowing a host to send a single packet to a selected set of hosts. To reach multiple destination hosts using unicast communication, a source host would need to send an individual packet addressed to each host. With multicast, the source host can send a single packet that can reach thousands of destination hosts.

Experimental Addresses    240.0.0.0/4 (240.0.0.0 to 255.255.255.254)
                 These addresses are reserved for future use. This suggests that they could be converted to usable addresses. Currently, these addresses are not usable in IPv4 network. However, these addresses are used for research.

Default Route     0.0.0.0/8 (0.0.0.0 to 0.255.255.255).
                 The default route is “catch all” route to route packets when the specific route is not available.

Loopback Address           127.0.0.0/8 (127.0.0.0 to 127.255.255.255).
                 The loopback address is special address that hosts use to direct traffic to themselves.

Link-Local Addresses     169.254.0.0/16 (169.254.0.0 to 169.254.255.255)
                 These link-local addresses can be automatically assigned to the local host by the operating system in environment where no IP configuration is available.

Test-Net Addresses      192.0.2.0/24 (192.0.2.0 to 192.0.2.255)
                 The test-net-addresses are set aside for teaching and learning purpose.

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ICT Solutions 2018-11-28 11:56:35

LAN and WAN

LAN (Local Area Network)
LAN is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building and has its network equipment and interconnects locally managed.

WAN (Wide Area Network)
WAN is the network that is interconnected by two or more LANs. WAN is not only defined by a larger geographic distance, but also generally defined by leased telecommunication circuits.

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ICT Solutions 2018-11-25 17:04:16

Network Protocols

Network Protocols are machine languages used to communicate the devices on the network. For devices to communicate on a network, they must follow different protocols that perform the many tasks to be complicated. The protocols define the followings:

- The format of the message, such as how much data to put into each segment
- The way intermediary devices share information about the path to the destination
- The method to handle update messages between intermediary devices
- The process to initiate and terminate communications between hosts

The examples of Network Protocols are as follows:

Hypertext Transfer Protocol (HTTP): HTTP is a common protocol that controls the way that a web server and web client interact.

Transport Protocol: Transmission Control Protocol (TCP) is the transport protocol that manages the individual conversions between a web server and web client. TCP divides the HTTP messages into smaller pieces, called segment, to be sent to the destination client. It also controls the size and rate of messages exchanged between the server and the client.

Internet Protocol (IP): IP takes the formatted segments from TCP, encapsulates them into packets, assign the appropriate addresses, and select the best path to the destination client.

Network Access Protocols: Network access protocols describe two primary functions: data-link management and the physical transmission of data on the media. Data-link management protocols take the packets from IP and format them to be transmitted over the media. The physical media controls how the signals are sent over the media and how they are interpreted by the receiving clients.

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ICT Solutions 2018-11-15 20:09:15

OSI and TCP / IP Model

OSI Model
                     The Open System Interconnection (OSI) Model provides an abstract description of the network communication process. International Organization for Standard (ISO) develops it to provide a road map for non-proprietary protocol development. The OSI model is just a reference model and many of OSI protocols are no longer in use. There are seven layers in OSI Model. Those are as follows:

Layer 7 - Application
                        Performs services for the application used by the end users.

Layer 6 - Presentation
                       Provides data format information to the application.

Layer 5 - Session
                      Manages session between users.

Layer 4 - Transport
                     Defines data segments and numbers them at the source, transfers the data, and reassembles the data at the destination.

Layer 3 - Network
                    Creates and addresses packets for end-to-end delivery through intermediary devices in other network.

Layer 2 - Data Link
                    Creates and addresses frames for host-to-host delivery on the local LANs and between WAN devices.

Layer 1 - Physical
                    Transmits binary data over media between devices. Physical layer protocols define media specifications.

TCP/IP Model
                    TCP / IP is an open standard. The rules and implementation of the TCP/IP model were cooperatively developed by members of the industry using Request for Comments (RFC) documents. There are four layers in TCP/IP Model. Those are as follows:

Layer 4 - Application
                   Represents application data to the user.

Layer 3 - Transport
                Supports communication between devices and performs error correction.

Layer 2 - Internet
                   Finds the best path through the network.

Layer 1 - Network access
                  Controls hardware devices and media.

Comparison of OSI and TCP / IP Model

7. Application	4. Application
6. Presentation
5. Session
4. Transport	3. Transport
3. Network	2. Internet
2. Data Link	1. Network Access
1. Physical	1. Network Access

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ICT Solutions 2018-11-12 14:17:10

Short Description of Networking Devices

Desktop Computer
A common computer used in a home or offices.

Laptop
A portable computer.

LAN Media
Local-area network media, usually copper cable.

Wireless Media
Depicts local-area network wireless access.

Switch
The most common devices for interconnecting local-area networks

Router
A device that helps direct message between networks

Firewall
A device that provides security of network.

Server
A common computer dedicated to provide application services to end users on a network. Server stores information to share with its clients.

Cloud
A group of networking devices out of local management control, often the Internet itself.

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ICT Solutions 2018-11-12 11:25:38

How to configure Frame Relay in Cisco Networking Devices (Eg. 2)

The example of how to configure the Frame Relay in Cisco Networking Devices is shown in the below with the picture together. I hope this example will be benefit for brothers and sisters who are learning Cisco Networking.

Router 1
en
config t
hostname R1
int g0/0
ip address 192.168.1.1 255.255.255.0
no shut

int s0/0/0
description Link From Router1 to Router2
ip address 223.128.1.1 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 101
no shut

int s0/0/1
encap frame-relay
no shut
exit

int s0/0/1.201 point-to-point
description Link From R1 to R3
ip address 223.128.1.5 255.255.255.252
frame-relay interface-dlci 201
no shut
exit

int s0/0/1.301 point-to-point
description Link From R1 to R4
ip address 223.128.1.9 255.255.255.252
frame-relay interface-dlci 301
no shut
exit

int s0/0/1.401 point-to-point
description Link From R1 to R5
ip address 223.128.1.13 255.255.255.252
frame-relay interface-dlci 401
no shut
exit

int s0/0/1.501 point-to-point
description Link From R1 to R6
ip address 223.128.1.17 255.255.255.252
frame-relay interface-dlci 501
no shut
exit

router rip
version 2
network 192.168.1.0
network 223.128.1.0
network 223.128.1.4
network 223.128.1.8
network 223.128.1.12
network 223.128.1.16
end
copy run start

Router 2
en
config t
hostname R1
int g0/0
ip address 192.168.2.1 255.255.255.0
no shut

int s0/0/0
description Router2 to Router1
ip address 223.128.1.2 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 102
no shut
exit

router rip
version 2
network 192.168.2.0
network 223.128.1.0
end
copy run start

Router 3

en
config t
hostname R3

int g0/0
description Link From Router3 to Router1
ip address 192.168.3.1 255.255.255.0
no shut

int s0/1/0
description Link From Router3 to Router1
ip address 223.128.1.6 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 103
no shut
exit

router rip
version 2
network 192.168.3.0
network 223.128.1.4
end
copy run start

Router 4
en
config t
hostname R4

int g0/0
ip address 192.168.4.1 255.255.255.0
no shut

int s0/1/0
description Link From R4 to R1
ip address 223.128.1.10 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 104
no shut

exit

router rip
version 2
network 192.168.4.0
network 223.128.1.8
end
copy run start

Router 5
en
config t
hostname R5

int g0/0
ip address 192.168.5.1 255.255.255.0
no shut

int s0/0/0
description Link From Router5 to Router1
ip address 223.128.1.14 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 105
no shut
exit

router rip
version 2
network 192.168.5.0
network 223.128.1.12
end
copy run start

Router 6
en
config t
hostname R6

int g0/0
ip address 192.168.6.1 255.255.255.0
no shut

int s0/1/0
description Link From Router6 to Router1
ip address 223.128.1.18 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 106
no shut
exit

router rip
version 2
network 192.168.6.0
network 223.128.1.16
end
copy run start

***Thank You***

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ICT Solutions 2018-11-12 10:48:10

How to configure Frame Relay in Cisco Networking Devices (Eg.1)

Router1
en
config t
hostname Router1
int s0/0/0
encap frame-relay
no shut
exit

int s0/0/0.102 point-to-point

description Link From Router1 to Router2
ip address 223.200.100.5 255.255.255.252
frame-relay interface-dlci 102
no shut
exit

int s0/0/0.103 point-to-point
description Link From Router1 to Router3
ip address 223.200.100.9 255.255.255.252
frame-relay interface-dlci 103
no shut
exit

router rip
version 2
network 223.200.100.4
network 223.200.100.8
end
copy run start

Router2
en
config t
hostname Router2
int s0/0/0
description Link from Router2 to Router1
ip address 223.200.100.6 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 202
no shut
exit

router rip
version 2
network 223.200.100.4
network 223.200.100.8
end
copy run start

Router3

en
config t
hostname Router3
int s0/0/0
description Link from Router3 to Router1
ip address 223.200.100.10 255.255.255.252
encap frame-relay
frame-relay lmi-type cisco
frame-relay interface-dlci 303
no shut
exit

router rip
version 2
network 223.200.100.4
network 223.200.100.8
end
copy run start

You can see how to configure frame relay in cloud. We will set dlci number in each serial port and link to corresponding routers.

If you want to do testing in Cisco packet tracer, please click here to download packet tracer file.

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ICT Solutions 2018-11-11 22:24:34

How to configure EtherChannel in Cisco Switches

EtherChannel is a combination of two or more physical ports into one logical or virtual port in the switches for redundancy or bandwidth requirements.

The example of how to configure the EtherChannel in Cisco Switches is shown in the below with the picture together. I hope this example will be benefit for brothers and sisters who are learning Cisco Networking.

Switch1
Step 1 : Give Name to Switch 1
en
config t
hostname IT

Step 2 : Create VLan and give name to it
vlan 20
name IT
exit

Step 3 : Create Etherchannel
interface range f0/1 - 4
switchport mode access
switchport access vlan 20
channel-group 5 mode auto
end

Step 4 : Activate the connection to the PC
config t
interface f0/5
no shut
end

Step 5 : Save Configuration
copy run start

Switch 2
Step 1 : Give Name to Switch 2
en
config t
hostname HR

Step 2 : Create VLan and give name to it
vlan 20
name IT
exit

Step 3 : Create Etherchannel
interface range f0/1 - 4
switchport mode access
switchport access vlan 20
channel-group 5 mode auto
end

Step 4 : Activate the connection to the PC
config t
interface f0/5
no shut
end

Step 5 : Save Configuration
copy run start

Please click here to download Packet Tracer Configuration file to do testing.

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ICT Solutions 2018-11-11 22:01:53

How to configure VLan in Cisco Networking Devices

VLan is virtual local area network. It is mostly used to manage the hosts in the network. The example of how to configure VLan in Cisco Networking Devices is shown in the below with the picture together. I hope this example will be benefit for brothers and sisters who are learning Cisco Networking.

Switch 0

Creating VLan
en
config t

hostname tnw87.com
vlan 10
name IT_Department
vlan 20
name HR_Department
vlan 30
name Engineering_Department
end

Checking VLan (VLan we've created is working or not)
show vlan brief

Define Switch Ports
config t
int f0/1
no shut
switchport mode trunk
exit

int f0/2
no shut
switchport mode access
switchport access vlan 10
exit

int f0/3
no shut
switchport mode access
switchport access vlan 20
exit

int f0/4
no shut
switchport mode access
switchport access vlan 30
end

Save Configuration
copy run start

Router 0
en
config t
hostname tnw87.com
int g0/0
no shut
int g0/0.1
encapsulation dot1Q 10
ip address 192.168.1.1 255.255.255.0
no shut
exit

int g0/0.2
encapsulation dot1Q 20
ip address 192.168.2.1 255.255.255.0
no shut
exit

int g0/0.3
encapsulation dot1Q 30
ip address 192.168.3.1 255.255.255.0
no shut
exit

router rip
version 2
network 192.168.1.0
network 192.168.2.0
network 192.168.3.0
end
copy run start

If you want to do testing VLan configuration in packet tracer, please click here to download VLan.pkt.

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ICT Solutions 2018-11-11 17:40:41

How to configure DHCP in Cisco IOS Routers

DHCP is a dynamic host configuration protocol. We don't need to manually set IP address to the hosts in the local network by configuring DHCP in the routers. The router will automatically set by itself. The example of how to configure DHCP in Cisco IOS Router is shown in the below with the picture together. I hope this example will be benefit for brothers and sisters who are learning Cisco Networking.

Router
en
config t
int g0/0
ip address 192.168.1.1 255.255.255.0
no shut
exit

ip dhcp pool Test
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.1
end
copy run start

If you want to see sample configuration in packet tracer, you can download pkt file. Click here to download.

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ICT Solutions 2018-11-11 17:01:59

How to configure PPP in Cisco Routers

PPP is Point-to-Point Protocol and it is a Wide Area Network (WAN) Technology. The example of how to configure PPP (PAP) in Cisco IOS Routers is shown in the below with the picture together. I hope this example will be benefit for brothers and sisters who are learning Cisco Networking.

Mandalay Router
en
config t
username Mandalay password Mandalay
hostname Mandalay
int s0/0/0
ip address 223.200.100.1 255.255.255.252
no shut
encap ppp
ppp authentication pap
ppp pap sent-username Naypyidaw password Naypyidaw
exit

int s0/0/1
ip address 223.200.100.9 255.255.255.252
no shut
encap ppp
ppp authentication pap
ppp pap sent-username Yangon password Yangon
exit

router rip
version 2
network 223.200.100.0

end
copy run start

Naypyidaw Router
en
config t
username Naypyidaw password Naypyidaw
hostname Naypyidaw

int s0/0/0
ip address 223.200.100.2 255.255.255.252
no shut
encap ppp
ppp authentication pap
ppp pap sent-username Mandalay password Mandalay
exit

int s0/0/1
ip address 223.200.100.5 255.255.255.252
no shut
encap ppp
ppp auth pap
ppp pap sent-username Yangon password Yangon
exit

router rip
version 2
network 223.200.100.0
network 223.200.100.4

end
copy run start

Yangon Router
en
config t
username Yangon password Yangon
hostname Yagngon
int s0/0/1
ip address 223.200.100.6 255.255.255.252
no shut
encap ppp
ppp auth pap
ppp pap sent-username Naypyidaw password Naypyidaw
exit

int s0/0/0
ip address 223.200.100.10 255.255.255.252
no shut
encap ppp
ppp auth pap
ppp pap sent-username Mandalay password Mandalay

router rip
version 2
network 223.200.100.4

end
copy run start

If you want to do testing of this configuration in Packet Tracer, please click here to download pkt file.

💬 Comment

ICT Solutions 2018-11-11 14:31:57

How to configure OSPF in Cisco Router

OSPF is Open Shortest Path First and it is a link state routing protocol. The example of how to configure OSPF in Cisco IOS Routers is shown in the below with the picture together. I hope this example will be benefit for brothers and sisters who are learning Cisco Networking.

Router 1

Activate the connection to Router 3
int s0/0/0
ip address 223.200.100.1 255.255.255.252
no shut
exit

Configure OSPF
router ospf 10
network 192.168.1.0 0.0.0.255 area 0
network 223.200.100.0 0.0.0.3 area 0
network 223.200.100.8 0.0.0.3 area 0
end

Save the configuration
copy run start

Router 2

Activate the connection to PC2
en
config t
int g0/0
ip address 192.168.2.1 255.255.255.0
no shut

Activate the connection to Router 1
int s0/0/1
ip address 223.200.100.10 255.255.255.252
no shut

Activate the connection to Router 3
int s0/0/0
ip address 223.200.100.6 255.255.255.252
no shut
exit

Configure OSPF
router ospf 10
network 192.168.2.0 0.0.0.255 area 0
network 223.200.100.8 0.0.0.3 area 0
network 223.200.100.4 0.0.0.3 area 0

end

Save the configuration
copy run start

Router 3

Activate the connection to PC3
en
config t
int g0/0
ip address 192.168.3.1 255.255.255.0
no shut

Activate the connection to Router 1
int s0/0/0
ip address 223.200.100.2 255.255.255.252
clock rate 64000
no shut

Activate the connection to Router 2
int s0/0/1
ip address 223.200.100.5 255.255.255.252
clock rate 64000
no shut
exit

Configure OSPF
router ospf 10
network 192.168.3.0 0.0.0.255 area 0
network 223.200.100.0 0.0.0.3 area 0
network 223.200.100.4 0.0.0.3 area 0
end

Save the configuration
copy run start

If you want to do testing in Packet Tracer, please click here to download .pkt file.

💬 Comment

ICT Solutions 2021-10-01 08:55:46

How to configure EIGRP in Cisco Routers

EIGRP is Enhanced Interior Gateway Routing Protocol and it is an advanced distance vector routing protocol. The example of how to configure EIGRP in Cisco IOS Routers is shown in the below with the picture together. I hope this example will be benefit for brothers and sisters who are learning Cisco Networking.

Router 1

Activate the connection to PC1
en
config t
int g0/0
ip address 192.168.1.1 255.255.255.0
no shut

Activate the connection to Router2
int s0/0/1
ip address 223.200.100.9 255.255.255.252
clock rate 64000
no shut

Activate the connection to Router 3
int s0/0/0
ip address 223.200.100.1 255.255.255.252
no shut
exit

Configure EIGRP
router eigrp 10
network 192.168.1.0 0.0.0255
network 223.200.100.0 0.0.0.3
network 223.200.100.8 0.0.0.3
end

Save the configuration
copy run start

Router 2

Activate the connection to PC2
en
config t
int g0/0
ip address 192.168.2.1 255.255.255.0
no shut

Activate the connection to Router 1
int s0/0/1
ip address 223.200.100.10 255.255.255.252
no shut

Activate the connection to Router 3
int s0/0/0
ip address 223.200.100.6 255.255.255.252
no shut
exit

Configure EIGRP
router eigrp 10
network 192.168.2.0 0.0.0.255
network 223.200.100.8 0.0.0.3
network 223.200.100.4 0.0.0.3
end

Save the configuration
copy run start

Router 3
Activate the connection to PC3
en
config t
int g0/0
ip address 192.168.3.1 255.255.255.0
no shut

Activate the connection to Router 1
int s0/0/0
ip address 223.200.100.2 255.255.255.252
clock rate 64000
no shut

Activate the connection to Router 2
int s0/0/1
ip address 223.200.100.5 255.255.255.252
clock rate 64000
no shut
exit

Configure EIGRP
router eigrp 10
network 192.168.3.0 0.0.0.255
network 223.200.100.0 0.0.0.3
network 223.200.100.4 0.0.0.3
end

Save the configuration
copy run start

If you want to see sample configuration in packet tracer, please click here to download pkt file.

(Note: you need to give ip address, subnet mask and default gateway to the hosts)

💬 Comment

ICT Solutions 2018-11-11 14:14:26

How to configure EIGRP in Cisco Routers

Router 1

Configure EIGRP
router eigrp 10
network 192.168.1.0 0.0.0255
network 223.200.100.0 0.0.0.3
network 223.200.100.8 0.0.0.3
end

Save the configuration
copy run start

Router 2

Activate the connection to PC2
en
config t
int g0/0
ip address 192.168.2.1 255.255.255.0
no shut

Activate the connection to Router 1
int s0/0/1
ip address 223.200.100.10 255.255.255.252
no shut

Router 3
Activate the connection to PC3
en
config t
int g0/0
ip address 192.168.3.1 255.255.255.0
no shut

Save the configuration
copy run start

If you want to see sample configuration in packet tracer, please click here to download pkt file.

(Note: you need to give ip address, subnet mask and default gateway to the hosts)

💬 Comment

ICT Solutions 2018-11-11 10:54:09

How to configure RIP in Cisco Routers

RIP (Routing Information Protocol) is the oldest distance vector routing protocol. The maximum number of hop count is 15 and the hop count number 16 is defined as infinite distance. The converged time is slow if compared with other routing protocols such as EIGRP, OSPF and IS-IS. There are two versions in RIP: version 1 and version 2.

RIP V1

RIP v1 uses FLSM (fixed length subnet masking) and does not support VLSM(variable length subnet masking). Using FLSM causes IP wastes.

FLSM Examples,

192.168.1.0 /24

192.168.2.0 /24

RIP V2

RIP V2 supports VLSM (variable length subnet masking). If there are different amount of hosts in an organization, we should use RIP v2.

For example,

HR Department : 20 hosts

Engineering Department: 50 hosts

IT department: 10 hosts

Sales department: 30 hosts

The following is the sample configuration of RIP in Cisco Routers.

Router 1

Activate Connection to Router 2

en
config t
int s0/0/0
ip address 200.100.10.1 255.255.255.252
clock rate 64000
no shut

Activate Connection to Switch 1
int g0/0
ip address 192.168.1.1 255.255.255.0
no shut

Configure RIP V1/V2

router rip
version 2
network 192.168.1.0
network 200.100.10.0
end

Save the Configuration
copy run start

Switch 1
Activate Connection to Router 1

en
config t
int f0/1
no shut

Activate Connection to PC5
int f0/2
no shut

Activate Connection to PC6
int f0/3
no shut
end

Save the Configuration

copy run start

Router 2
Activate Connection to Router 1
en
config t
int s0/0/0
ip address 200.100.10.2 255.255.255.252
clock rate 64000
no shut

Activate Connection to Switch 2
int g0/0
ip address 192.168.2.1 255.255.255.0
no shut

Configure RIP V1/V2
router rip
version 2
network 192.168.2.0
network 200.100.10.0
end

Save the Configuration
copy run start

Switch 2
Activate Connection to Router 2
en
config t
int f0/1
no shut

Activate Connection to PC7
int f0/2
no shut

Activate Connection to PC8
int f0/3
no shut
end

Save the Configuration
copy run start

Pkt File
Please click here to download packet tracer file.
(Note: you need to give ip address, subnet mask and default gateway to the hosts)

💬 Comment

ICT Solutions 2018-11-10 21:50:28

Securing Cisco Networking Devices

We should set passwords in Cisco networking devices so that non authorized people can't access easily. The followings are the ways to set passwords in Cisco networking devices by CLI.

(Note : Most of Cisco Networking Devices are needed to be configured by CLI)

*** Console Password ***

enable (en)

configure terminal (config t)

line console 0

password console123 (type secured password)

*** Enable Password ***

enable (en)

configure terminal (config t)

enable password enable123 (type secured password)

*** Enable Secret ***

enable (en)

configure terminal (config t)

enable secret secret123 (type secured password)

*** VTY Password ***

enable (en)

configure terminal (config t)

line vty 0 15

password vty123 (type secured password)

*** To go back enable mode ***

end

*** To save configuration ***

copy run start

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We should set passwords in Cisco networking devices so that non authorized people can't access easily. The followings are the ways to set passwords in Cisco networking devices by CLI.