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Project on.

MPLS TRAFFICENGINEERINGGuided byProf. Sarfraz Shaikh

Presented by

Mr. Suraj Raut

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Traffic Engineering

enhance quality of service

Traffic Manageengg. traffic in optimize resources use

order to..

enhance resilience

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Quality if Service

Three main constrains in order to be able to transport any Traffic:

Respect of the Signal

- same shape of the signal at ingress & egress

Interactivity

- delay is as short as possible

Integrity

-packet loss as low as possible

The aim is to get same

working condition as TDM

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QoS

ServicesShape

respect

Low

delay

Packet

loss

Audio, Video streaming

Telephony, video

conferencing.

Data

Gaming

...

xxx

xxx xxx

xxx

x

x

xxx

xx

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Reasons for QoS degradation:-

Shape respect Delay Variation

A common origin...

Excessive delay Buffer, excessive

store & foreword

Packet loss Excessive load

In router

QoS

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Singlen/welement-

1. Congestion management

2. Queue management

3. Link efficiency

4. Traffic shaping & policing

QoS

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QoS..

How to deal with Congestion??????

First In First Out (FIFO) queuing Priority queuing (PQ) Constant queuing (CQ)

Waited Faire queuing (WFQ) Class Base WFQ

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QoS..

How to deal with Queue??????

RED(random early detection) -Avoiding CongestionFlow RED -increase the probability of dropping a flow

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QoS..

How to deal with Traffic shaping & policing??????

CAR(committed access rate) -Managing Access Bandwidth Policyand Performing Policing

GTS(generic traffic shaping) -Controlling Outbound Traffic Flow

FRTS(frame relay traffic shaping) -Managing Frame Relay Traffic

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QoS policy control

Some applications or traffic can benefit from QoS-specific routing-

1.transferring stock records to a corporate office (for example, on a

higher-bandwidth, higher-cost link for a short time),

2. transmitting routine application data such as e-mail over a lower-

bandwidth, lower-cost link

QoS

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QoS..

Theeasiestwayto findapath betweenasource & adetestinationisto selectshortestpath.

Ifthedistanceismeasuredintermsofno.ofhope calledhopealgorithm.

Routingalgorithm suchas WSP,SWP & DAPhavetwoobjectives: minimizeno.ofhope

& maximize B.W.

MIRAalso consider path requestrejectionminimization & itisbasedonmax-flow

computation & min.

interface.

InMIRAthebackup pathis reducedto possibilityof reroutinginnetwork fault.

Other proposaldonotconsideranyscheme.

ROUTING & FAULT MANAGEMENT

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QoS..

PROTECTION ROUTING

1. Graphical weight computation module(GWCM)

2. Working path routing module(WRM)

3. Backup decision module(BDM)

4. Backup routing module(BRM)

5. Signaling WP & BP module

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QoS..PROTECTION ROUTING

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QoS..

ROUTING OFPACKETS

1. Hopebyhop routing

2. Explicitrouting

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Packetized Voice

QoS

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Resources Optimization

MPLS contribution forRouting.

MPLS is built on pre-determined path- path can be cal. In order to avoid hot-spot: explicit routing

MPLS routing = two steps- Ingress router chooses the best LSP & insert the label

- Intermediate router forward thepacket

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Resources Optimization

Signalingmechanisms

1. LDP(label distribution protocol).

2. CR-LDP

3. RSVP-TE(resource reservation protocol)

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Resources Optimization

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ResilienceIn case of failure n/w switch the traffic to self handling

Two ways-

1) Protection:

both the alternate as well as normal path are set up

& alternate path is in stand by mode.

2)Restoration:

alternate path is calculated after failure

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Resilience

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Resilience

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Resilience

Thank

you..