What Are The Best enterprise Applications For Mpls (Multi-Protocol Label Switching)?

Segregation Jim - What Are The Best enterprise Applications For Mpls (Multi-Protocol Label Switching)?

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Given a scenario that you are developing the network architecture for a company (single or multi-site)....what would be the best application(s) where you would choose Mpls as the (or part of the) solution? This may not be as easy as it sounds.....thus the dissatisfaction faced by many responsible for a company network infrastructure solution.

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First, I advise reading "Mpls Enabled Applications: Emerging Developments and New Technologies". A easy Google hunt will find the best source to secure a copy.

For further resources check out one of these books:

Mpls and Vpn Architectures, Volume I & Volume Ii

by Jim Guichard; Ivan Pepelnjak; Jeff Apcar

Definitive Mpls Network Designs

by Jim Guichard; François Le Faucheur; Jean-Philippe Vasseur

Traffic Engineering with Mpls

by Eric Ccie #4122 Osborne; Ajay Ccie #2970 Simha

Internet Routing Architectures, Second Edition

by Sam Halabi; Danny McPherson

Generally, Mpls is often concept of when considering replacing an existing frame relay network. Mpls is best at supporting the QoS needed for supporting integrated VoIp and data. Plus, Mpls is significantly easier for to engineer and roll out than say a new frame relay cloud.

A good scenario would be an company Wan with many aid delivery needs, teleconferencing, VoIp, video, and data. Each of these services has different data delivery requirements. VoD needs bandwidth but after the introductory push it is not time sensitive, data is not in any reasonable sense time sensitive, VoIp and video conferencing are both extremely time sensitive applications.

In this situation Mpls is an exquisite option as transport. Not only is it fast, not requiring deep packet inspection beyond the ingress point to prioritize traffic, it also allows for many levels of aid which puts you in a position to future proof your network to some extent.

Mpls is also referred to as tag switching. The way that it works is at the network ingress point each packet is 'tagged', or a header put on the packet, which gives it a network identifier and a aid level if aid levels have been implemented. When switching within the network each router needs only seek the tag to prioritize and forward the packet.

In addition, network aid providers are involving to Mpls because of its ease of implementation and the potential to transparently provision many customers on the same network, as opposed to frame relay which requires a separate network for each customer, and keep those customers perfectly digitally segregated. So, it's a case of faster, cheaper, good for the aid provider.

QoS for Voip and video is the big thing. Mpls gets used a fair bit for bandwidth guarantees and limits for things like Disaster salvage (Dr). A good example is when a company has two offices in different geographical areas, and wants to use a data-syncing solution (San replication, for example) between them for disaster recovery. But they have small bandwidth, and don't want the Dr traffic to swamp the general or Voip traffic. Being able to label your traffic and set guarantees (for both minimum and maximum bandwidth) is pretty powerful. This also offers guarantees for in-order packet delivery (very leading for Voip/voice).

For a single-site business, I would probably not deploy Mpls unless there was a serious estimate of bandwidth in use, or if the campus was significantly large enough to account for using label switching for speed / QoS considerations. Unfortunately, there's no easy reply for this scenario.

For a multi-site, geographically diverse business, I would strongly think Mpls as part of the solution, particularly if I am using a aid provider such as Sprint, Level 3, Bt, or any others to supply the meat of the network. This arrangement allows me to leverage the availability, redundancy, and scalability of their network to take the shortest path between sites.

Most fellowships involving to Mpls were previously operating their private-line networks with whether direct connections between offices, or utilizing frame-relay connections. A hub-and-spoke architecture is only efficient if all the data flows to/from the central location. However, most frame networks are meshed together, to facilitate office-to-office networking without amazing the hub site. It's very easy for a large estimate of sites to turn into involved and unwieldy collections of frame circuits and Pvcs. If the company's Igp is not set up properly, traffic patterns can come to be carport at best, and down right chaotic at worst.

Using Mpls with a provider eliminates the need to worry about any of the meshing that would have been handled by many inexpressive lines or frame-relay networks. Usually, routing is exchanged with a provider via Bgp, or in the case of smaller networks, statically routed.

An exquisite application of Mpls seen in custom is that with a Bgp-connected network, it is potential to set up a disaster salvage scenario at any other site associated to the network by a easy matter of involving the routing declaration for the original location's Ip block to the Dr location. It's potential to do this on frame relay as well, but it can get involved if the network is not configured properly.

For application-specific items, Mpls can deal with any variety of traffic classifications, which make it an ideal candidate for multi-site voice traffic to go along with your data.

The downside of Mpls is that you're at the mercy of your provider if there's a configuration mistake or if their redundant network doesn't redirect colse to an outage properly. Additionally, routing can come to be involved if there is a inexpressive network on the back end connecting two or more sites that also share an Mpls connection.

As an overview of Mpls.......

The Pros:

* Site to Site Routing

* Enhanced Carrier Aware QoS

* Reduced Deployment Complexities

* enhancing High Availability

* Quickened Disaster salvage Readiness

The Cons:

* introductory Architectural organize Cycles

* Reduced Visibility of converyance Network

* Enhanced security Concerns

In overview Mpls is absolutely just one alternative for the Wan transportation backbone. The advantages are clear over a Frame Relay network.....as are the pitfalls. whether you choose Mpls as all or part of your network infrastructure solution must takes those into account.

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