Post on 28-Dec-2015
transcript
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:--The first defined protocol & used protocol
-Many disadvantagesMPLS:-
-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 IP datagrames and Ethernet traffic.
-Major applications of MPLS are telecommunications traffic engineering and MPLS VPN
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
-A 20-bit label value.
-A 3-bit Traffic Class field for QOS (quality of service) priority (experimental) and ECN (ExplicitCongestion 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)
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
-Control the entire path of a packet without explicitly specifying the intermediate routers.
-Creating tunnels through the intermediary routers that can span multiple segments
MPLS OPERATORS
SERVICE PROVIDERS:-BSNL , Reliance Info communication , Bharti
Telecom.HARDWARE SUPPLIERS:-
Cisco , Nortel , Alcatel , Huawei ....
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
MPLS Disadvantages
An additional layer is added The router has to understand MPLS
MPLS doesn’t provide:-Protection against
a)Mis-configuration in the core
b)Attacks within corec)Customer n/w security
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.
Thank you !
Doubts?