AnApplicationofVoIPandMPLS Advisor: Dr. Kevin Ryan

1
An Application of VoIP and MPLS Advisor Dr.
Kevin Ryan
For Jitesh Inc.

• By
• Jitesh Kunder

2
Overview

• Introduction
• Setup at Jitesh Inc.
• Introduction to MPLS
• Project Description
• Project Status
• Experience at Jitesh Inc.

3
Introduction

• Leading player in the field of expertise
• Two Major departments in IT are
  1)Networking Provision and maintenance of
  computer and network support
• 2)Telecommunication Provision and maintenance
  of telephone service and communication

4
Current Setup IT Department

• Roles Responsibilities
• 1) Networking Team
• Provision and maintenance of computers
• Providing network support to the users
• Maintenance and upgrade of the various Servers
• Taking data backup and providing this data
  whenever required
• Ensuring data security by making data available
  to authorized users
• Installing various application soft wares like
  antivirus, office soft wares and providing timely
  updates
• Continue

5
Current Setup IT Department

• 2) Telecommunication Team
• Setting up the infrastructure and providing
  telephone service to all the employees
• Creating a communication link between distant
  locations like conference bridges to keep these
  offices connected at all times
• Maintenance and upgrades when required

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Current Network Structure

• There are separate dedicated lines for Voice and
  Data communication between each locations

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Current Network Structure

• Advantages
• - Both departments can handle their own issues
  and hence management is simpler
• - Any upgrades required, need not be done on
  both the networks

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Current Network Structure

• Disadvantages
• - The expense to maintain two separate lines for
  voice and data is much higher
• - There are separate vendors for both these
  lines and co-ordination becomes difficult

9
Proposed Network Structure

• Goal of the Company Provide single line for
  Voice communications and for data between
  different locations using MPLS connection.

10
Introduction
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Label Switch Routers

• Ingress LSR
• Ingress LSRs allow an IP packet to enter the MPLS
  network by adding to them a MPLS label. These
  routers receive a packet that is not labeled yet,
  insert a label (stack) in front of the packet,
  and send it on a data link.
• Egress LSR
• Similarly Egress LSRs remove the MPLS labels from
  the packet thus, indicating the end of MPLS
  network. Ingress and egress LSRs are edge LSRs.
• Intermediate LSR
• Intermediate LSRs receive an incoming packet that
  is already labeled by ingress or another
  intermediate LSR. It is here that label stacking
  actually takes place. MPLS labels are either
  stacked or removed as per the requirement and
  then transported to the desired destination.

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Description

• Multi-protocol label switching (MPLS)
• MPLS is a technique and not a service
• Embedded on an existing layer like the IP layer
• Uses the technique of packet forwarding based on
  labels
• Routers just have to check the labels and not the
  destination IP address
• Packets are forwarded by switching the labels and
  not touching the IP addresses

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Advantages

• Advantages of MPLS
• The use of one unified network infrastructure
• Better IP over ATM integration
• Border Gateway Protocol (BGP)-free core
• The peer-to-peer model for MPLS VPN
• Optimal traffic flow
• Traffic engineering

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MPLS Header
15
MPLS Header

• The Header is broken into 20-3-1-8 bits
• First 20 bits form the label value and their
  value can be 0 to or 1,048,575
• Bits 20 to 22 are the three experimental (EXP)
  bits. Quality of service (QoS) can be set using
  these bits.
• Bit 23 is the Bottom of Stack (BoS) bit
• Bits 24 to 31 are used for Time To Live (TTL)

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Basic Operation
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Label Stacking

• MPLS-capable routers do not break the IP packets
• More than one packet required to understand the
  actual destination of the packet
• BS bit is set to 1 indicating it to be the last
  label

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Class and Path

• Forward Equivalence Class
• Class assigned every time a packet enters the
  MPLS network
• All packets belonging to the same FEC have the
  same label
• Decided by the Ingress LSR
• Label Switched Path
• Series of routers through which the packets have
  a medium to reach the destination
• Packets belonging to the same FEC have the same
  label

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Project Description

• Jitesh Inc. has a wide range of products, the
  call center for product support is located in UK
  and all the customers are based in the US
• Call route
• Call on toll free number? call routed to the PBX
  office in US ? PBX in US connects the PBX at UK
• Dedicated T-1 lines are provided by the ATT.

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Current Network Set-up

• Company pays for Toll free calls as well as
  dedicated T-1 lines.

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Current Network Set-up

• Advantages
• - Cost effective
• The company would otherwise have to pay for an
  international Toll Free number which would be
  very expensive

22
Current Network Set-up

• Disadvantage
• Quality of service (QOS)
• Down-time for the connection
• Bandwidth
• Required more bandwidth
• Cost Savings
• Expensive compared to the proposed MPLS
  solution

23
Proposed Network Structure

• Single dedicated MPLS connection for Voice and
  Data

24
Proposed Network Structure

• Advantages over conventional set-up
• Better QoS
• Faster communication
• Single dedicated line for Voice communication
  and Data communication
• Annual reduction in costs by approx. 60
• Disadvantage over conventional set-up
• - High initial investment cost of network set-up

25
Proposed Network Structure
Break-even Point
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Project Status

• Currently deployed in phases
• Over budget
• Quality of Service - average
• Approval from management

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Responsibilities at Jitesh Inc.

• Call Analysis (Feasibility Study)
• Cost Analysis
• Interaction with prime vendors
• Presentation to the management

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Experience at Jitesh Inc.

• Enhanced technical skills
• Telecommunication
• Network Infrastructure
• Software tools
• Communication with vendors and upper management