CCNP

Redistribution : Common Language Of Routing Protocols

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redistribution

In this article we will deeply check redistribution. First of all we need to know “why redistribution is used”. We use “redistribution” , to have a communication between different routing protocols. For example if we are using multiple protocols like EIGRP , OSPF and etc. and want communication between these protocols, we should use redistribution. […]

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Policy Based Routing Overview And Configuration

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policy based routing

Policy based routing is a method for defining path selection due to rules. It is known as the “programming language” of the routers. Policy based routing works based on if / then statements. Check to configuration example above for more information. POLICY BASED ROUTING CONFIGURATION – PC-1 is surfing on internet all day, route that […]

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OSPF Neighbor States – OSPF Neighbor Forming Process

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ospf neighbor states

After OSPF Basics it is time to look at “OSPF Neighbor States”. In this article, we will review to step by step OSPF neighbor adjacency. May be you saw the image below before, but we will examine it deeply. 1) First step of  “OSPF neighbor states” is determining the “Router ID”s. Both routers determine their router ID’s […]

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Loop Guard And UDLD Overview & Configuration

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loop guard

LOOP GUARD : As you know, if you are using STP, one port is blocked in a topology like this because of preventing loops.But BPDU change continues. In this scenario X refers to blocked port. If cable between B-C is a fibre and just transmit or receive is down, block is removed. So that loop […]

CCNP

IPv6 Overview And Communication Types

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ipv6 header

IPv6, which is invented by IETF consists of 128 bit and it is tought that will replace IPv4 in a few years. When IPv4 is invented, it wasn’t beleived that need for public ip addresses will increase rapidly and today, IPv4 addresses are about to finish. That is why IPv6 was invented by IETF. Because […]

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Per VLAN Spanning Tree (PVST) Overview And Basics

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pvst

STP is the loop detection mechanism on the switches as you know. But STP has a brother whose name is PVST ( Per VLAN Spanning Tree ) ! Per-VLAN Spanning Tree (PVST) maintains a spanning tree instance for each VLAN configured in the network. It uses ISL Trunking and allows a VLAN trunk to be forwarding […]

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OSPF Configuration Example : Step By Step Guide

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ospf example

It is time to take a look to configuring OSPF ( Open shortest path first ) with an OSPF configuration example. In this article we will see “how to configure OSPF” step by step. In our example, we will examine the figure below deeply. 1 Configure OSPF for the network above. Router 1 should be a […]

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Layer-3 Switching (Inter VLAN Routing)

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mls

When you begin to network lessons, it is known that switching is layer – 2 ! Omg it is something like that 11 is not divided to 4. But after the pre school you learn it that it is divided to 4. So today we are gonna learn that Layer-3 Switching, what is inter vlan […]

CCNP

IPv6 Configuration Example : Step By Step Guide

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ipv6 configuration

IPv6 can work with static routing and dynamic routing protocols as well as IPv4. Configuration steps are similar, but there are a few differences too. RipNG, OSPFv3 and static routing configurations will be made for the figure below : * First , IPv6 should be activated on each router via “ipv6 unicast-routing” command. IPv6 CONFIGURATION […]