Post on 10-Apr-2018
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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..