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MULTIPROTOCOL LABEL SWITCHING

MULTIPROTOCOL LABEL SWITCHING. PRESENTED BY:- VIVEK SINGH THAKUR VIVEK MISHRA HEMANT GUPTA TARANMEET SINGH KAKKAR VIVEK GUPTA. CONTENTS. Basics Working & MPLS components MPLA operators Advantages Disadvantages MPLS does not provide Summary. IP:-

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MULTIPROTOCOL LABEL SWITCHING

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  1. MULTIPROTOCOL LABEL SWITCHING

  2. PRESENTED BY:- VIVEK SINGH THAKUR VIVEK MISHRA HEMANT GUPTA TARANMEET SINGH KAKKAR VIVEK GUPTA

  3. CONTENTS • Basics • Working & MPLS components • MPLA operators • Advantages • Disadvantages • MPLS doesnot provide • Summary

  4. IP:- -The first defined protocol & used protocol -Many disadvantages MPLS:- -Multi Protocol Label Switching -High speed , less complexity -It directs and carries data from one network node to the next with the help of labels. - MPLS is mainly used to forward IPdatagrames and Ethernet traffic. -Major applications of MPLS are telecommunications traffic engineering and MPLS VPN

  5. Working & MPLS Components :- -MPLS works by prefixing packets with an MPLS header, containing one or more "labels". This is called a label stack. -Each label stack entry contains four fields -Multi Protocol Label Switching is arranged between Layer 2 and Layer 3

  6. -A 20-bit label value. • -A 3-bit Traffic Class field for QOS (quality of service) priority (experimental) and ECN (Explicit • Congestion Notification). • -A 1-bit bottom of stack flag. If this is set, it signifies that the current label is the last in the stack. • -An 8-bit TTL (time to live) field. LABEL EDGE ROUTER(LER) -responsible for assignment and removal of labels -Supports the multi protocol connected to dissimilar n/w (ATM , Ethernet)

  7. LABEL SWITCHING ROUTER(LSR) -High speed router operates in core of MPLS LABEL SWITCHING PATH(LSP) -Path from source to destination FORWARD EQUIVALANCE CLASS(FEC) -Group of packets that share same requirement LABEL DISTRIBUTION PROTOCOL(LDP) -Protocol for explicit the signalling

  8. -Control the entire path of a packet without explicitly specifying the intermediate routers. • -Creating tunnels through the intermediary routers that can span multiple segments

  9. MPLS OPERATORS SERVICE PROVIDERS:- BSNL , Reliance Info communication , Bharti Telecom. HARDWARE SUPPLIERS:- Cisco , Nortel , Alcatel , Huawei ....

  10. MPLS Advantages • Improves packet-forwarding performance in the network • Supports QOS and COS for service differentiation • Supports network scalability • Integrates IP and ATM in the network • Builds interoperable networks

  11. MPLS Disadvantages • An additional layer is added • The router has to understand MPLS

  12. MPLS doesn’t provide:- Protection against a)Mis-configuration in the core b)Attacks within core c)Customer n/w security

  13. Summary of MPLS • Simplify packet forwarding based on a fixed length label • Enable explicit routing in IP networks • Can be used for traffic management, QOS routing • Enable fast restoration from failures.

  14. Thank you !

  15. Doubts?

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