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

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This article takes a look at the available routing protocol authentication options for the most often used routing protocols: The configuration of authentication with BGP is very simple as it requires only a single configuration command. To configure MD5 authentication use the message-digest keyword. Routing algorithms ef are designed to be as simple as possible.

Routing Basics – DocWiki

About Affiliates Cisco Systems, Inc. All other things being equal, a Mbps Ethernet link would be preferable to a kbps leased line. Path length is the most common routing metric. Routed protocols are protocols that are routed over an internetwork.

The preceding discussion describes switching between a prtoocoles and a destination end system. Regardless of which of these options is selected there are also two different methods of authentication exchange that can be configured for each, these include: Personal tools Log in.

If the router knows how to forward the packet, however, it changes the destination physical address to that of the next hop and transmits the packet. In the routing loop displayed in Figure: 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. Packets from nonbackbone routers travel to the backbone routers, where they are sent through the backbone until they reach the general area of the destination.

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The integrity of routing information inside a network is of rourage utmost importance as it can influence how traffic reaches specific destinations. In other words, the routing algorithm cisdo offer its functionality efficiently, with a minimum of software and utilization overhead.

Load can be calculated in a variety of ways, including CPU utilization and packets processed cnocepts second. But how, specifically, are routing tables built? Link-state algorithms, doncepts, can be more expensive to implement and support.

For example, a route for traffic could be changed to route through a device that is able to capture the traffic and resend it leaving few footprints of attack. Any reliability factors can be taken into account in the te of the reliability ratings, which are arbitrary numeric values usually assigned to network links by network administrators. Distance vector algorithms also known as Bellman-Ford algorithms call for each router to send all or some portion of its routing table, but only to its neighbors.

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. If not, the next hop is usually another router, which executes the same switching decision process.

The configuration required to setup a key chain are shown in Table 4. Because routers are located at network junction points, they can cause considerable problems when they fail. Finally, routing algorithms use a variety of metrics that affect calculation of optimal routes.

They can provide substantially better throughput and reliability. In source-routing systems, routers merely act as store-and-forward devices, mindlessly sending the packet to the next stop.

A – Static, dynamic, flat, hierarchical, host-intelligent, router-intelligent, intradomain, interdomain, link-state, and distance vector. The next hop may be the ultimate destination host.

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Dynamic routing algorithms can be supplemented with static routes where appropriate. Second, various types of routing algorithms sucrit, and each algorithm has a different impact on network and router resources.

Routing Protocol Authentication Concepts and Configuration

Routing involves two basic activities: Link-state protocols are generally more scalable than distance vector protocols.

Other routing protocols define hop count, a metric that specifies the number of passes through internetworking products, such as routers, that a packet must take en route from a source to a destination. Routing tables contain information used by switching software to select the best route.

This article introduces the underlying concepts widely used in routing protocols. With certain protocols, routing domains can be divided into routing areas, but intradomain routing protocols are still protocole for switching both within and between areas.

The best routing algorithms are often those that have withstood the test of time and that have proven stable under a variety of network conditions.

Each router, however, sends concets the portion of the routing table that describes the state of its own links. In the latter system, routers have the routing intelligence. Dynamic routing adjusts to changing network circumstances by analyzing incoming routing update messages without administrator intervention. 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.

In most cases, a host determines that it must send a packet to another host.

Some network links might go down more often than others. The configuration required to setup RIP authentication is shown in Table 6.