CISCO PROTOCOLES CONCEPTS DE ROUTAGE ET SCURIT PDF

Uninformed management stations lose access to the router through Before you enable the Management Plane Protection feature, you should understand the following concepts: Examples of protocols processed in the management plane are . Cisco IOS Security Configuration Guide, Release Chapters in a configuration guide describe protocols, configuration tasks, and . Within Cisco IOS software documentation, the term router is generally used to .. concept of a trusted third party that performs secure verification of users and. Last modified by Deonte R. Carroll on Sep 19, AM. Visibility: Open to anyone. nt Routing Protocols and

Author: Jushura Tujas
Country: Azerbaijan
Language: English (Spanish)
Genre: Politics
Published (Last): 25 August 2009
Pages: 257
PDF File Size: 8.51 Mb
ePub File Size: 18.21 Mb
ISBN: 183-2-77414-449-8
Downloads: 55815
Price: Free* [*Free Regsitration Required]
Uploader: Brazuru

Routing Basics

In the latter system, routers have the routing intelligence. Algorithms that use static routes are simple to design and work well in environments where network traffic is relatively predictable and where network design is relatively simple.

This article takes a look at the available routing protocol authentication options for the most often used routing protocols: Some routing algorithms operate in a flat space, while others use routing hierarchies.

In this protocolea, path length is the sum of the costs associated with each link traversed. If the message indicates that a network change has occurred, the routing software recalculates routes and sends out new routing update messages.

Routing Basics – DocWiki

The topic of routing has been covered in computer science literature for more than two decades, but routing achieved commercial popularity as late as the mids. This is usually referred to orutage source routing. What is the specific nature of the information that they contain?

The following sections analyze these routing algorithm attributes. In addition, the role of routing protocols is briefly contrasted with the role of routed or network protocols. Keys can also be configured with specific transmit send and receive accept lifetimes that provide the ability to have keys automatically change at a predetermined time.

The nature of these two algorithm types is different. As it examines the packet’s destination protocol address, the router determines that it either knows or does not know how to forward the packet to the next hop. Sophisticated routing algorithms can base route selection on multiple metrics, combining them in a single hybrid metric.

  BONE OUT FROM BONEVILLE PDF

In source-routing systems, routers merely act as store-and-forward devices, mindlessly sending the packet to the next stop. Finally, routing algorithms use a variety of metrics that affect calculation of optimal routes. Retrieved from ” http: Any reliability factors can be taken into account in the assignment of the reliability ratings, which are arbitrary numeric values usually assigned to network links by network administrators.

They can provide substantially better throughput and reliability. The preceding discussion describes switching between a source and a destination end system.

As there are two different ways to configure routing protocol cissco this article will review OSPF and BGP first as they require individualized configuration. If the router does not know how to forward the packet, it typically drops the packet. First, the particular goals of the algorithm designer affect the operation of the resulting routing protocol.

Some routing algorithms assume that the source end node will determine the entire route.

Communication cost is another important metric, especially because some companies may not care about performance as much as they care about operating expenditures. In addition, routing algorithms must converge rapidly. Because they converge more quickly, link-state algorithms are somewhat less prone to routing loops than distance vector algorithms. Routing is often contrasted with bridging, which might seem to accomplish precisely the same thing to the casual observer.

Configure OSPF area authentication. Routing protocols, on the other hand, are protocols that implement routing algorithms. Some network links might go down more often than others. In these algorithms, routers determine the path through the internetwork based on their own calculations.

Routed protocols are protocols that are routed over an internetwork. But how, specifically, are routing tables built?

Because intradomain routers need to know only about other routers within their domain, their routing algorithms can be simplified, and, depending on the routing algorithm being used, routing update traffic can be reduced accordingly.

All the following metrics have been used:. Once a key chain has been configured, the authentication for EIGRP neighbors is enabled on each interface that is connected to an authenticating neighbor. Hopefully, the information contained within this article has been able to introduce the possibilities and how they can be configured. The next hop may be the ultimate destination host. Monitoring these parameters on a continual basis can be resource-intensive itself.

  BRAVUCONADAS DE LOS ESPAOLES PDF

As many routing algorithms become aware of the problem, they will quickly select the next-best path for all routes normally using that segment. A – Static routing is configured by the network administrator and is not capable of adjusting to changes in the network without network administrator intervention. Topics summarized here include routing protocol components and algorithms. Although line delay may be longer, they will send packets over their own lines rather than through the public lines that cost money for usage time.

How do routing algorithms determine that one route is preferable to others? The primary difference between the two is that bridging occurs at Layer 2 the link layer of the OSI reference model, whereas routing occurs at Layer 3 the network layer.

Routing Protocol Authentication Concepts and Configuration

Routing involves two basic activities: Most of the dominant routing algorithms today are dynamic routing algorithms, which adjust to changing network circumstances by analyzing incoming routing update messages. Routing tables contain information used by switching software to select the best route. One of the methods that can be used to prevent these types of attack is the use of routing protocol authentication. Efficiency is particularly important when the software implementing the routing algorithm must run on a computer with limited physical resources.

Load refers to the degree to which a network resource, such as a router, is busy. Routing delay refers to the length of time required to move a packet from source to destination through the internetwork. Keep in mind that these authentication solutions scuriit not encrypt the information exchanged between the devices, but simply verifies that the identity of these devices.