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Contents:
  1. MPLS explained | Network World
  2. IP Routing for Next Generation Network Services
  3. TOP FIVE BENEFITS OF HAVING THE RIGHT TECHNOLOGY SOLUTION
  4. Ready for the future with IP VPN

In order to deploy MPLS successfully in broadband networks, networking professionals must understand why and how today's broadband networks function. The book discusses MPLS and how its VPN service should be best used in a broadband environment, concentrating on key design issues and solutions, including how to manage tens of thousands of interfaces and host routes and hundreds of dynamic VPNs; why they need to use dynamic address assignment; and how routes should be summarized into the core.

Detailed descriptions of the technology, design principles, network configurations, and real-world case studies are provided throughout the book, helping readers develop a pragmatic understanding of MPLS-based broadband Access VPNs. Kumar has more than 10 years of industry experience and has a degree in Computer Engineering from Trinity College in Dublin, Ireland.


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He has 15 years of industry experience and was involved with DSL broadband at Cisco since some of the earliest deployments in Kumar contributed to broadband technology and product evolution at Cisco and worked on major customer designs, both in the U. Kumar is a recognized broadband expert with knowledge of the technologies, products, and trends that are driving the market.

He has worked directly with major customers and designs, both in the U. Kumar has also worked on MPLS deployments, as part of his role to support the Cisco aggregation product portfolio. Skip to: Bottom. Log In. My Account.

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The process is repeated at each hop along the route until the packet eventually reaches its destination. All of those hops and all of those individual routing decisions result in poor performance for time-sensitive applications like video-conferencing or voice over IP VoIP. Multi-protocol label switching MPLS , that venerable WAN workhorse launched at the turn of the century, addresses this problem by establishing pre-determined, highly efficient routes.

Instead, subsequent routers use the label as an index into a table that provides them with a new FEC for that packet. This gives the MPLS network the ability to handle packets with particular characteristics such as coming from particular ports or carrying traffic of particular application types in a consistent fashion.

The key architectural point with all this is that the labels provide a way to attach additional information to each packet — information above and beyond what the routers previously had. The most common use cases are branch offices, campus networks, metro Ethernet services and enterprises that need quality of service QoS for real-time applications. In fact, one of the key benefits of MPLS is that it separates forwarding mechanisms from the underlying data-link service.

MPLS explained | Network World

In other words, MPLS can be used to create forwarding tables for any underlying protocol. The Label: The label holds all of the information for the MPLS routers to determine where the packet should be forwarded. Experimental: Experimental bits are used for Quality of Service QoS to set the priority that the labeled packet should have.

This usually means the router is an egress router.

IP Routing for Next Generation Network Services

Time-To-Live: This identifies how many hops the packet can make before it is discarded. The benefits of MPLS are scalability, performance, better bandwidth utilization, reduced network congestion and a better end-user experience. MPLS itself does not provide encryption, but it is a virtual private network and, as such, is partitioned off from the public Internet.

Therefore, MPLS is considered a secure transport mode. And it is not vulnerable to denial of service attacks, which might impact pure-IP-based networks. On the negative side, MPLS is a service that must be purchased from a carrier and is far more expensive than sending traffic over the public Internet.

TOP FIVE BENEFITS OF HAVING THE RIGHT TECHNOLOGY SOLUTION

As companies expand into new markets, they may find it difficult to find an MPLS service provider who can deliver global coverage. Typically, service providers piece together global coverage through partnerships with other service providers, which can be costly. Garter raised that provocative question back in and answered itself by predicting that MPLS would continue to be a fundamental part of the WAN landscape, but that most enterprises would slowly transition to a hybrid environment consisting of both MPLS networks and the public Internet.

MPLS will continue to have a role connecting specific point-to-point locations, like large regional offices, retail facilities with point of sale systems, regional manufacturing facilities, and multiple data centers. And it is required for real-time applications.

Ready for the future with IP VPN

But, in fact, both technologies have a role to play in modern WANS. This means the deployment of SD-WAN edge devices that apply rules and policies to send traffic along the best path. By contrast, with MPLS predetermined routes need to be painstakingly provisioned and once the fixed circuits are up, making changes is not a point-and-click exercise.

But once an MPLS network is deployed, it delivers guaranteed performance for real-time traffic. SD-WAN can route traffic along the most efficient path, but once those IP packets hit the open Internet, there are no performance guarantees. The most sensible strategy going forward will be to offload as much MPLS traffic as possible to the public Internet, but continue to use MPLS for time-sensitive applications that require guaranteed delivery.

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