MPLS networking at PSP Co

Multi-Protocol Label Switching

Presented by:

Hamid Sheikhghanbari

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MPLS networking at PSP Co

• PSP Co.'s networking needs• How MPLS service meets the needs• Motivation• MPLS Basics• Operation• Advantages and Disadvantages• Alternatives to MPLS

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PSP Co.'s networking needs

• Establishing a online connection between Office and factories for application

• Establishing VOIP between office and factories Centralized the network

• Supporting and troubleshooting the network more efficiently

• Accelerate and enhance the company's efficiency

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Why MPLS?

• Needed a single infrastructure that supports multitude of applications in a secure manner

• Provide a highly scalable mechanism that was topology driven rather than flow driven

• Load balance traffic to utilize network bandwidth efficiently

• Allow core routers/networking devices to switch packets based on some simplified header

• Ultra fast forwarding• VPN

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Motivation

• IPo The first defined and used protocolo De facto the only protocol for global

Internet working

… but there are disadvantages

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Motivation (cont.)

• IP Routing disadvantages o Connectionless - e.g. no QoSo Large IP Header - At least 20 byteso Routing in Network Layer - Slower than Switchingo Usually designed to obtain shortest path - Do not take into account additional metrics

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Motivation (cont.)

• ATMo connection oriented - Supports QoSo fast packet switching with fixed length

packets (cells)o integration of different traffic types (voice,

data, video)

… but there are also disadvantages

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Motivation (cont.)

• ATM disadvantageso Complexo Expensiveo Not widely adopted

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Motivation (cont.)

• Idea: Combine the forwarding algorithm used in ATM with IP.

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MPLS Basics

• Multi Protocol Label Switching is arranged between Layer 2 and Layer 3

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MPLS Basics (cont.)

• MPLS Characteristicso Mechanisms to manage traffic flows of

various granularities (Flow Management)o Is independent of Layer-2 and Layer-3

protocols o Maps IP-addresses to fixed length labelso Supports ATM, Frame-Relay and Ethernet

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MPLS Basics (cont.)

• Generic label format

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MPLS Operation

• The following steps must be taken for a data packet to travel through an MPLS domain. o label creation and distribution o table creation at each router o label-switched path creation o label insertion/table lookup o packet forwarding

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MPLS Operation Example

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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 • Use of special services, such as traffic

engineering

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MPLS Disadvantages

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

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Alternative to MPLS

• Frame Relay• Point to Point• ATM• Leased Line

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Protocol Comparison

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References

• http://en.wikipedia.org/wiki/Multiprotocol_Label_Switching

• http://t1rex.blogspot.com/2010/06/ip-vpn-vs-mpls-vpn.html

• http://www.t1rex.com/mplsnetwork.html• http://www.ietf.org/rfc/rfc3031.txt

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MPLS networking at PSP Co

Q & A

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MPLS networking at PSP Co

Thank you!

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