DESIGN OF LEASED LINE NETWORK USING VMUX

Presented by:- XHITESH KUMAR THAKUR ROSHAN LAL SAHU BRAJENDRA KUMAR SINGH HARSHIT BORWANKAR SHREEKAR WAGHELA

INTRODUCTION - LEASED LINELeased line are basically point to point connection

given on lease basis.

To transmit the data between computer and electronic information device we uses a leased line.

Leased circuits are provided to subscribers for internal communication between their offices/factories at various sites within a city/town or different cities/town on point to point basis, or on a network basis interconnecting

LEASED LINELeased lines

Limited to point-to-point communication Limits who you can talk to

Carriers offer leased lines at an attractive price per bit sent to keep high-volume customers

Leased Line

TYPES OF LEASED LINEPoint to point connection.

Multi-label-protocol-switching(MPLS) VPN.

Internet Leased Line.

POINT TO POINT CONNECTIONA dedicated link through the service providers’ network.

This link is not shared with other customers, and provides a dedicated circuit between two locations

it is a permanently established circuit through the service provider’s switched network, similar to what is illustrated in the figure below.

FIGURE DEPICTING POINT TO POINT CONNECTION

Point to point connection using vmux

MPLS VPNMPLS VPN stands for MULTIPROTOCOL

LABEL SWITCHINGVIRTUAL PRIVATE NETWORK.

An MPLS Network is formed by connecting each location with a single link to a service provider MPLS network.

MPLS VPN NETWORK

BSNL – VPN Core Network

STM1 LinksM40e Router

Chennai

KolkattaMumbai

Pune

Ernakulam

Delhi

Hyderabad

Lucknow

Ahmedabad

Bangalore

BSNL – MPLS VPN Network POP Layout

Core Router (M40e)

Gigabit Ethernet Switch

Edge Router (M40e/M20)STM-1 Link

Gigabit Ethernet

E3 Link

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MPLS BenefitsThe performance characteristics of layer 2

networksThe connectivity and network services of

layer 3 networksImproves the price/performance of

network layer routingImproved scalability

Advantage of MPLS VAN over POINT TO POINT CONNECTIONQuality of Service: Since MPLS network enables traffic engineering, it is possible

to send (for example) – data traffic over a lower priority path and real time delay sensitive voice/ video packets over a high priority/ lesser used/ shorter path. This enables network convergence (The Wide Area Network becomes more suitable for introduction of new services like voice, video, multicast traffic, hosting etc).

Connection oriented network: MPLS is a connection-oriented network unlike connection less networks like IP. So, it is more reliable.

Bandwidth Allocation: MPLS networks allow for dynamic bandwidth allocation and hence can be used to provide bandwidth on demand (for a specific period etc) to customers. Further, rate limiting and other bandwidth management parameters allow a certain bandwidth to be dedicated for mission critical applications.

DISADVANATAGEMPLS port and loop rates were higher

than expected. Had the network been more geographically diverse, this factor would have been less noticeable, but for sites that were all close together and yet some distance from the closest POP, the pricing was out of line.

MPLS requires greater IT overhead to manage all of the routers at each site. The customer was looking to decrease the IT burden, not increase it.

MPLS VPN USING VMUX

INTERNET LEASED LINEAn Internet Leased Line is usually a

dedicated line which offers direct connectivity to the Internet.

This is done by connecting the nearest service provider nodal point and the customer premises with a dedicated copper line, optical fiber cable, radio links

INTERNET LEASED LINE(CONTD.)Internet Leased Lines are preferred over

broadband connections for providing internet connectivity to larger organizations like colleges, corporate offices, hospitals, etc.

BASIC MODEL FOR INTERNET LEASED LINE

ADVANTAGE

Internet Leased Lines offer same speed for both uploads and downloads

(symmetric connectivity), while in broadband (through DSL technology) the

speeds are always optimized for downloads and the upload speeds are much

lesser. etc. all of which are used by medium and large businesses regularly.

Generally, broadband connectivity is shared with multiple users in a locality.

Broadband plans generally denote the best bandwidth that can be attained and

not the assured bandwidth levels. But a 2 Mbps Internet Leased Line should

give 2 Mbps of performance as it is a dedicated connection without any

sharing.

ADVANTAGE(CONTD.)There is a wider choice of bandwidth selection (64 Kbps, 128

Kbps,… 2 Mbps,… 155 Mbps etc) with Internet Leased Lines. With broadband, the selection is more restricted.

Internet Leased lines are provided through multiple media – Copper, Fiber, Radio links or a combination of the above. Optical media communication is more reliable and offers better fault tolerance/ performance/ monitoring abilities, especially for higher bandwidths.

Internet Leased Lines offer a pool of permanent IP addresses which enables organizations to run their own mail servers, web servers and other applications.

TYPES OF LEASED CIRCUITG-4 MUX

MLLN VMUX

G-4 MUX

MLLN VMUXThe MLLN is an integrated, fully managed, multi-service digital network

platform through which service provider can offer a wide range of services at an optimal cost to Business Subscribers. Backed by a flexible Network Management System with powerful diagnostics and maintenance tools, the MLLN can be used to provide high-speed leased lines with improved QoS (Quality of Service), high availability and reliability. The Network Management System also supports Service Provisioning, Network Optimization, Planning and Service Monitoring.

The system offers features such as end to end circuit creation and monitoring, Circuit Loop Test and fault isolation, Alternate re-routing of traffic in case of trunk failure, Software programmability of NTUs, etc.

MLLN USING VMUX

ADVANTAGE

Circuit fault reports generated proactively.

On demand the bandwidth can be increased.

 Protection against the failure of the circuit.

 Centrally managed from Network Management

System.

Easy re-routing and configuration

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