ADVANCED SERVICES

A distribute-list is typically used to filter routing updates either inbound or outbound from a router perspectives usually running some form of dynamic routing protocol. Even though there is the keyword “distribute”, this is not to be confused with route distribution. Again, I think the choice of the terms here could have been better but that’s my [ Read More ]

Route Maps are characterized as one of the most powerful tool in Cisco IOS toolkit and the reason for it is because they can do a large number of things for us. If you are familiar with the “IF then ELSE” statements in Programming Language then understanding Route Maps will be a breeze for you. IF a [ Read More ]

Redistribution is basically the injection of routes learned from one routing domain, static routes or directly connected routes to another routing domain. The reason for redistribution is to have end to end connectivity between routing domains which then could serve different purposes such as backup path to a specific destination for instance. Redistribution can be [ Read More ]

It’s already no secret that organizations differ in terms of governance policies and regulations. An organization may need to route 3rd party vendor traffic for instance via a T1 to reach specific destinations as opposed to a default path. PBR provides us with the ability to implement packet forwarding and routing via a specific next [ Read More ]

DMVPN stands for Dynamic Multipoint VPN and it is a dynamic tunneling form of a virtual private network (VPN). It represents an effective solution for dynamic secure overlay networks by forming a partial dynamic mesh network. Okay ! That’s a lot of ‘dynamic” but let’s move on. In this post, I will show you the [ Read More ]

In this section, we will discuss securing your data while transmitting through a GRE tunnel. If you are unfamiliar with GRE tunnels, please take the time to read this post here first. We will use the same topology as the one used in the GRE post. We will just add encryption on top. It is [ Read More ]

GRE stands for Generic Routing Encapsulation. As the name implies, it is a mechanism or tunneling protocol that permits the encapsulation of many different IP protocols inside an arbitrary transport protocol. It can be used for a number of things such as: *Provide multi-protocol local networks over a single-protocol backbone *Provide workarounds for limited hop counts networks. A [ Read More ]

In this post, we will talk about MPLS (Multiprotocol Label Switching) which is an open standard base protocol capable of transporting different type of either L2 or L3 payloads. We will look at facts in terms of the origin of the protocol, some of the different design options we have available today and how to [ Read More ]