1. Multiprotocol Label Switching
Done by:
Sara M Alarfaj

2. Outline: Overview What is multi protocol label switching (MPLS)?
MPLS Background
MPLS Basics
Basic Model for MPLS Network
Benefits of MPLS
MPLS Video

3. Overview Multiprotocol Label Switching (MPLS):
is a mechanism in high-performance telecommunication networks that directs data from one network node to the next based on short path labels rather than long network addresses, avoiding complex lookups in a routing table.

4. What is multi protocol label switching (MPLS)?
Multi Protocol – supports protocols even other than IP
Supports IPv4, IPv6, IPX, AppleTalk at the network layer
Supports Ethernet, Token Ring, FDDI, ATM, Frame Relay, PPP at the link layer
Label – short fixed length identifier to determine a route
Labels are added to the top of the IP packet
Labels are assigned when the packet enters the MPLS domain
Switching – forwarding a packet
Packets are forwarded based on the label value
NOT on the basis of IP header information

5. MPLS Background: Integration of layer 2 and layer 3
Simplified connection-oriented forwarding of layer 2
Flexibility and scalability of layer 3 routing
MPLS does not replace IP; it supplements IP
Traffic can be marked, classified and explicitly routed
QoS can be achieved through MPLS

6. MPLS Basics: 1-A Label Switched Path (LSP) is set up for each route
A LSP for a particular packet P is a sequence of routers :
<R1,R2………..Rn>
2-Edge routers :
analyze the IP header to decide which LSP to use
add a corresponding local Label Switched Path Identifier, in the form of a label
forward the packet to the next hop

7. MPLS Basics Count.. 3-Subsequent nodes :
just forward the packet along the LSP
simplify the forwarding function greatly
increase performance and scalability dramatically
New advanced functionality for QoS, differentiated services can be introduced in the edge routers
Backbone can focus on capacity and performance
Routing information obtained using a common intra domain routing protocol such as OSPF

8. Basic Model for MPLS Network:
LSR = Label Switched Router
LER = Label Edge Router

9. Benefits of MPLS: Five reasons to move to MPLS: 1. Cost savings
2. QOS enablement.
3. Improved performance. 
4. Disaster recovery. 
5. Future proofing the network. 

10. The Primary Benefit of MPLS:
Is to eliminate dependence data link layer like technology like: ATM, Frame Relay, or Ethernet.

11. MPLS Video:

12. References: http://www.research.ibm.com/mplsws/publications/mpls1.p df
migration-reasons.html
_technology_home.html