Slides from a presentation to show the utility of MPLS and MPLS-TP to my classmates from the Master's Degree in Telecommunication Engineering at University of Extremadura. It is just a brief introduction, but you can find the references at the end of the file.

1. Multiprotocol Label Switching
Transport Prole
Alberto Serna, Andrea M. Urbano
Master's Degree in Telecommunication Engineering
Escuela Politécnica, University of Extremadura
Alberto Serna, Andrea M. Urbano MPLS-TP May 2014 1 / 33

2. Slides downloaded from:
www.albertosernait.es/docs/MPLS.pdf
Alberto Serna, Andrea M. Urbano MPLS-TP May 2014 2 / 33

3. 1 Introduction to MPLS-TP
Background and previous problems
MPLS, applications and evolution to MPLS-TP
2 Technological basis
Application MPLS
Concepts and elements of a generic MPLS network
3 Quality of Service
4 Other technologies
5 Conclussions
6 Bibliography
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4. Introduction
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5. MPLS - Background
ATM.
Level 2.
Based on switches and virtual cicuits.
Limitations.
Speed.
Integration with dierent technologies.
Alternative propietary solutions.
Cisco Tag Switching.
1997 - IETF Workgroup.
Development of MPLS.
Alberto Serna, Andrea M. Urbano MPLS-TP May 2014 5 / 33

6. MPLS - Previous problems
Redundant paths.
Unbalanced network.
Overloaded nodes.
Not connection oriented networks.
It was necessary to use the 4th level.
Monitorization and control.
Paths.
Delay.
Jitter.
etc.
It was dicult to assure certain QoS.
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7. Trac engineering
Flow classication.
QoS application.
Path control.
It uses labels.
Network conguration.
Backup paths.
Not only in the physical level.
Network monitorization.
Interesting for ISPs.
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8. Evolution to MPLS-TP
Backward compatibility with MPLS.
Increase of realiability and eciency.
It gets rid of negligible aspects of MPLS.
E.g. IP routing at level 3.
Focused on OAM.
Operation, Administration y Management.
It allows the management of SDH/SONET.
Full separation between Data and Control planes.
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9. Technological basis
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10. Protocol stack
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11. Encapsulation
Between levels 2 and 3.
It has a length of 32 bits.
Its parts will be shown later.
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12. The idea
LABELING THE TRAFFIC
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13. MPLS header
Label eld.
Exp eld.
S eld.
TTL eld.
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14. Concepts of a generic MPLS network [I]
Label.
It denes and associates some parameters to a data ow.
FEC [Forwarding Equivalence Class].
Data ows with the same label.
LSP [Label Switched Path].
Path assigned to a FEC.
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15. Concepts of a generic MPLS network [II]
LSR [Label Switching Router].
FEC routing.
LSRs from the edge of the network → LER [Label Edge Router].
LDP [Label Distribution Protocol].
Protocol for label assignation.
LIB [Label Information Base].
Equivalent to routing tables.
It relates labels with interfaces.
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16. Structure of a generic MPLS network
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17. Scope of application
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18. Examples of typical equipment
Juniper MX960 [Left] and Juniper QFX3000 [Right].
Prices over 60.000 euro.
Can integrate multiple technologies.
10GE, SONET/SDH, ATM, etc...
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19. Quality of Service
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20. Quality of Service
We must be able to dierentiate and guarantee sensitive trac [Voice
and video] from the rest.
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21. Quality of Service in MPLS - Experimental bits [I]
MPLS uses DiServ (Dierentiated Services).
In MPLS header there are 3 bits calledExperimental Bits.
Trac dierentiation.
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22. Quality of Service in MPLS - Experimental bits [II]
The experimental bits allow us to set the trac class.
Up to 8 trac classes.
Determined by LERs.
Through IP and TCP headers.
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23. Quality of Service in MPLS - Levels
3 dierent levels of Quality of Service.
1 It assigns the bandwidth agreed in the SLA.
2 The service obtains the necessary priority based on the path.
3 Each path obtains the necessary priority based on the LER.
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24. Quality of Service in MPLS - Application
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25. Other technologies
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26. Other technologies - MPLS-TE
Extension of MPLS.
Capacity to adapt to network conditions.
Trac routing based on those conditions.
Balance the network load.
Fault tolerant.
Re-routing and calculation of backup LSPs.
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27. Other technologies - RSVP-TE
Signaling protocol for resource reserve.
IP unicast and multicast ows.
It seeks QoS parameters for applications.
Extended in MPLS-TE.
It allows to set LSPs based on trac engineering.
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28. Conclusions
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29. Conclusions
The exponential growth of the Internet has increased the complexity
and requirements of the networks.
Higher bandwidths.
Higher reliability.
etc.
Technologies based on MPLS allow the integration of many dierent
technologies at the same time it makes easy to operate, administrate
and manage the networks.
Easy application of trac engineering and QoS.
Great performance and exibility through the use of labels.
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30. Final conclusion
This is just the tip of the iceberg...
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31. Bibliography
1 ITU-T: G.8010/Y.1355, G.8151/Y.1374, G.8113.x/Y.1373,
G.8121.1/Y.1382.1, G.8121.1/Y1382.2.
2 IETF RFCS 5994, 5586, 5718, 5654, 5860, 5951, 5921, 5950, 5960,
6215.
3 http://mpls-tp.com/
4 http://www.ramonmillan.com/tutoriales/mpls.php.
5 http://www.scribd.com/doc/62234395/Estado-Del-Arte-Mpls-TP
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32. Thanks for your attention
Alberto Serna, Andrea M. Urbano MPLS-TP May 2014 32 / 33

33. About us...
Alberto Serna Martín.
University of Extremadura.
mail@albertosernait.es
www.albertosernait.es
SernaOnline@twitter.com
Andrea María Urbano Cayuela.
University of Extremadura.
aurbanoc@alumnos.unex.es
UrbanoAndrea@twitter.com
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