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Tools

Network | NetRouting

Putty_Serial

Putty_Telnet

Putty_SSH

Telnet/SSH

Secure Usermode with password

Full Console Security

TFTP Flash

Copy startup-config to TFTP

Copy From TFTP to startup-config

Inter Vlan Communication(ROAS)
Inter Vlan | Inter Vlan IOS Configuration

Inter VLAN

Inter VLAN IOS Configuration

LAN/WAN Overview | Net Config | Routing Protocol Network Overview

Network Overview

LAN/WAN

Interface

Interface Type:
-Internet | Serial | Cable TV | DSL | 3G/49 | More.....
Interface configuration:
-Interface, Sub interface | IP address | Network mask | IP address dhcp | Duplex | Speed | More.....
Static Routing:
-IP route | Host route | Default route | Floating | Decisions: Administrative Distance
-Longest route | Gateway of Last Resort ...
Interior Gateway Protocol:
-Dynamic Routing: Rip, Ripv2, Ripng(ipv6), IGRP, EIGRP, IS-IS, OSPF ...
Exterior Gateway Protocol:
-BGP autonomous | ....

IGP: Metric

RIP Metric:
-Distance Vector
-hops or hop count : Hop count is the number of routers between a source
and destination: (up to 15).
IGRP Metric:
-Distance Vector (DV) algorithm
-An intra-domain routing protocol
-Proprietary by Cisco
-Default[bandwidth, delay], load, reliability, and maximum transmission unit (MTU).
EIGRP Metric: 256 * { K1*BW + [(K2*BW)/(256-load)] + (K3*delay) } * { K5/(reliability+K4) }
-Or 256 × ( Bandwidth + Delay )
-Distance vector & Link State routing protocol
-It uses DUAL that uses (diffusing update algorithm)
-It has five metrics: K1 = bandwidth, K2 = load, K3 = Delay, K4, K5 = reliability and MTU.
-EIGRP messages are Hello, Update, Query, Reply, and Acknowledgement.
-EIGRP uses a hello protocol to find neighboring routers
-Maintain a list of working neighbors
-Monitor ongoing hello messages to make sure the neighbor is still reachable
to notice when the path to a neighbor has failed.
-EIGRP exchange topology data which each router stores locally in a topology database.
-EIGRP uses topology database to describes facts about the network, but is a different
entity than the router’s IPv4 routing table.
OSPF Metric:
-Link-state routing protocol
-Causes routers to learn routes.
-Choose the best route to each subnet based on a metric
-Converge to choose new best routes when the network changes.
-OSPF use a hello protocol to find neighboring routers
-Maintain a list of working neighbors
-Monitor ongoing hello messages to make sure the neighbor is still reachable
to notice when the path to a neighbor has failed.
-OSPF exchange topology data which each router stores locally in a topology database.
-OSPF uses topology database to describes facts about the network, but is a different entity
than the router’s IPv4 routing table.

Serial
show ip interface brief | show ip interface interface-number | show ip route
Serial Interface Routing | IP Route Configuration | IP Route Configuration Continue

Serial Interface

show ip interfaces brief

show ip interface interface-number

show ip route

IPV4 Static, Float and Default Route

Ethernet
Ethernet WAN | IP Route Default and Float | show ip interface brief | show ip interface interface-number | show ip route

Ethernet WAN

Ethernet IPV4 Static, Default and Float

show ip interfaces brief

show ip interface interface-number

show ip route

Ether Channel |

Layer 3 EtherChannel

Classful

Classful Key Facts

Classful Mask

Classful Info

Binary Conversion And Prefix Mask

Subnet And Broadcast Calculation

Class A of IPv4

Class B of IPv4

Class C of IPv4

ClassLess C Example

Abbreviation

IPv6 Subnetting

IPv6 Addresses

IPv6 Local-Scope Multicast Addresses

IPv6 Multicast Scope Terms

More on IPv6 Multicast

Command Reference

More Command Reference

IPv6 Serial Configuration

IPv6 Ethernet Configuration

IPv6 Route Default and Float Schematic

IPv6 Default and Float Configuration

show ipv6 Interface

show ipv6 route

Ping | Extended Ping | Traceroute | telnet and SSH
Trouble shooting problems

Extended Ping
The ping command uses the Internet Control Message Protocol (ICMP)
ICMP echo request and ICMP echo reply messages for connectivity testing of Layer 3.
Ping the name or IP address of the destination
PC

Router

Extended Ping
Using Extended Ping to Test the Reverse Route
If a standard ping of a local LAN host works
But an extended ping of the same LAN host fails
The problem likely relates somehow to the host’s default router setting.

TraceRoute
traceroute command systematically helps pinpoint routing problems by showing how far a
packet goes through an IP network before being discarded using ICMP Protocol TTL(Time To Live) message
Ex: Ethernet
PC1---192.168.0.2---192.168.0.1---R1---192.168.1.2------------192.168.1.1---R2---192.168.2.1-------192.168.2.2---PC2
PC:tracert

Router:traceroute

Telnet and SSH

Using the IOS Telnet client via the telnet host command
Router:Telnet

Router:SSH

Network Overview

Dynamic Routing features

OSPF Concept and Operation

More OSPF Concept and Operation

OSPF Network Type Broadcast

OSPF Network Type Point-To-Point

OSPF Network Type Configuration

Network ID WildCard, Passive and Default Routes

OSPF Interface Cost Setting

OSPF Load Balancing

OSPF Command Reference 1

OSPF Command Reference 2

OSPF Command Reference 3

show ip ospf

show ip ospf type_number

show ip ospf neighbor

show ip ospf database

show ip ospf protocols

OSPF Multi Areas

Wireless Access Point 1

Wireless Access Point 2

Wireless Access Point 3

Cisco Access Point Modes

Cisco Wireless Terminology

Cisco Wireless Architecture

Cisco WLC Activities

Cisco Wireless LAN Schematic

Cisco Wireless LAN Configuration

Wireless Security and Privacy Key Term

Wireless and Security

Wireless Terminology

Wireless and Security

Wireless Authentication [wpa,wpa2,wpa3]

Monitor1 Monitor2

Monitor1

Monitor2

WLAN: Display a list of WLANs

WLAN: Creating a new WLAN

WLAN: General

WLAN: Security L2

WLAN: Security AAA

WLAN: QoS

WLAN: Advanced

Controllers

Wlan: Displaying(D.I.) | Wlan: Defining(D.I.) | Wlan: Editing(D.I.)

Controller: List of Dynamic Interfaces

Controller: Defining Dynamic Interface Name and Vlan ID

Controller: Editing Dynamic Interface Parameters

List of Radius(Aut Serv) | Configuring Radius(Serv)

Security:List of Radius Authentication Servers

Security:Configuring a new Radius Server

Management Access to from Wireless Networks

Help

Feedback

1_TCP Transport Layer(4) | 2_TCP Transport Layer(4) | Standard ACL Commands | Standard ACL Standard
Standard ACL Show Commands |

Standard ACL Transport 1

Standard ACL Transport 2

Standard ACL Commands

Standard ACL

Standard ACL Show Commands

Standard ACL Practice

Extended ACL Theory 1 | Extended ACL Theory 2 | Extended ACL Numbered vs Named
Extended ACL Example 1 | Standard ACL Example 2 | Extended ACL Commands

Extended ACL Theory 1