computer science

MPLS-TP

MPLS-TP is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand MPLS-TP rather than just read about it. In short: In telecommunications, Multiprotocol Label Switching - Transport Profile (MPLS-TP) is a variant of the MPLS protocol that is used in packet switched data networks. MPLS-TP is the product of a joint Internet Engineering Task Force (IETF) / International Telecommunication Union Telecommunication Standardization Sector (ITU-T) effort to include an MPLS Transport Profile within the IETF MPLS and PWE3 architectures to su…

Key takeaways

MPLS-TP belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect MPLS-TP to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of MPLS-TP from memory before moving on to harder problems.

Reference excerpt

In telecommunications, Multiprotocol Label Switching - Transport Profile (MPLS-TP) is a variant of the MPLS protocol that is used in packet switched data networks. MPLS-TP is the product of a joint Internet Engineering Task Force (IETF) / International Telecommunication Union Telecommunication Standardization Sector (ITU-T) effort to include an MPLS Transport Profile within the IETF MPLS and PWE3 architectures to support the capabilities and functionalities of a packet transport network.

Description MPLS-TP is designed for use as a network layer technology in transport networks. It will be a continuation of the work started by the transport network experts of the ITU-T, specifically SG15, as T-MPLS. Since 2008 the work is progressed in a cooperation between ITU-T and IETF. The required protocol extensions to MPLS being designed by the IETF based on requirements provided by service providers. It will be a connection-oriented packet-switched (CO-PS) application. It will offer a dedicated MPLS implementation by removing features that are not relevant to CO-PS applications and adding mechanisms that provide support of critical transport functionality. MPLS-TP is to be based on the same architectural principles of layered networking that are used in longstanding transport network technologies like SDH, SONET and OTN. Service providers have already developed management processes and work procedures based on these principles. MPLS-TP gives service providers a reliable packet-based technology that is based upon circuit-based transport networking, and thus is expected to align with current organizational processes and large-scale work procedures similar to other packet transport technologies. MPLS-TP is a low cost L2.5 technology (if the limited profile to be specified is implemented in isolation) that provides QoS, end-to-end OA&M and protection switching. In February 2008 the ITU-T and IETF agreed to work jointly on the design of MPLS-TP. Based on this agreement IETF and ITU-T experts will jointly work out the requirements and solutions. ITU-T in turn will update the existing T-MPLS standards based on the MPLS-TP related RFCs listed below.

ITU-T The following ITU-T Recommendations exist for MPLS-TP. Some of those Recommendations are superseding the ones that applied to T-MPLS before this work was ceased.

RFC or drafts The following IETF RFCs or drafts exist for MPLS-TP:

Solutions The solutions for the above requirements and framework are as mentioned below and is under development:

RFC 5718 An In-Band Data Communication Network For the MPLS Transport Profile RFC 5586 MPLS Generic Associated Channel- Defines GAL/G-ACH RFC 5462 "EXP field" renamed to "Traffic Class field" RFC 6435 MPLS Transport Profile Lock Instruct and Loopback Functions RFC 7087 A Thesaurus for the Interpretation of Terminology Used in MPLS Transport Profile (MPLS-TP) Internet-Drafts and RFCs in the Context of the ITU-T's Transport Network Recommendation MPLS-TP ACH TLV (IETF Draft) Proactive continuity and connectivity verification (Individual Draft) RFC 6291 Guidelines for the Use of the "OAM" Acronym in the IETF MPLS-TP OAM based on Y.1731 (Individual Draft) MPLS-TP Performance monitoring (Individual Draft) RFC 6427 MPLS Fault Management Operations, Administration, and Maintenance (OAM) RFC 6378 MPLS Transport Profile (MPLS-TP) Linear Protection RFC 7347 Pre-standard Linear Protection Switching in MPLS Transport Profile (MPLS-TP) MPLS-TP P2MP traffic protection (Individual Draft) MPLS-TP OAM Alarm suppression (Individual Draft) MPLS-TP & IP/MPLS Interworking (Individual Draft) MPLS-TP Ring Protection (Individual Draft) MPLS-TP LDP extension: No work MPLS-TP RSVP-TE extensions: No work

References

External links ITU-T series G recommendations IETF MPLS Charter MPLS-TP Mailing list archives Current mailing list (back to MPLS mailing list) Latest list of MPLS-TP standards

Worked examples

Example 1 — a first encounter with MPLS-TP

Start with the simplest possible case. Write down what MPLS-TP claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to MPLS-TP before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about MPLS-TP ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of MPLS-TP

In research: MPLS-TP appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses MPLS-TP in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: MPLS-TP is common in secondary-school and first-year university syllabi. It links to neighbouring topics Internet Standards, MPLS networking, Network protocols, so understanding it makes those chapters shorter.
In everyday life: Look for MPLS-TP outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study MPLS-TP in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what MPLS-TP means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain MPLS-TP out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is MPLS-TP in simple terms?

Why does MPLS-TP matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study MPLS-TP?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on MPLS-TP.