IT Blogtorials

Imagine Site A-1 is in Georgia, A-2 is in Illinois and A-3 is in New York. Full connectivity between all Site A-#s is required. What are our...

We've already laid out the ground work in my previous blogtorial " Configuring BGP - Dual Homed Design ". So all we are going ...

In "Configuring BGP - Dual Homed Design (Part 1)" we saw how we can configure R1 and R2, however R3 in the enterprise core still c...

In this blogtorial we will discuss how to implement a Dual Homed BGP design. So let's begin by defining what is a Dual Homed BGP design?...

This blogtorial is a continuation from my previous "Configuring BGP - Single Homed" . The topology now has a new ISP (ISP B) conne...

BGP is a highly complex routing protocol -- so complex that there are exams dedicated to just this protocol. Therefore, I will not dwell on ...

In this blogtorial we are going to talk about how to configure a IPSEC VPN between a linux machine (CentOS) and a Cisco router . I  had to ...

In this blogtorial we are going to talk briefly about OSPFv3. I will not be going into much detail and writing paragraphs explaining the det...

In this blogtorial we are going to talk about OSPF Not-So-Stubby-Area (NSSA). So we learned from my previous blogtorial that we can turn an ...

In this blogtorial we are going to talk about OSPF Totally Stubby Areas. If an area does not connect to any other areas or if the area is re...

In this blogtorial we are going to talk about OSPF Stub Areas. We can use stubby areas to limit the size of the OSPF database and when you h...

In this blogtorial we are going to talk about inbound route filtering meaning we will not take a certain "route". We are going to ...

In this blogtorial we are going to discuss on how to link an OSPF area which is not directly connected to Area 0 using GRE tunnels. Why woul...

In this blogtorial we are going to talk about OSPF virtual links. As you already know all areas must connect to area 0. However, if you have...