ip migration technical write-up

IP MIGRATION

Technical Write-up

Version 1.0

13-June-2008

Table of Contents Introduction......................................................................................................................... 3

Need for IP Migration......................................................................................................... 4

Timelines and Phases.......................................................................................................... 5

Migration Activity Plan ...................................................................................................... 6

Existing Setup – X.25 without TAP .............................................................................. 6

Stage 1 Setup – X.25 with TAP...................................................................................... 7

Stage 2 Setup - IP and X.25 co-existence ....................................................................... 8

Final Stage Setup - IP Migrated...................................................................................... 9

Schedule for Migration ..................................................................................................... 10

Stage wise ..................................................................................................................... 10

Geography wise ............................................................................................................ 10

New Features & Benefits with IP ..................................................................................... 11

Multiple Member end Scenarios................................................................................... 11

Higher Throughput & Infrastructure Consolidation ..................................................... 11

Improved Market data................................................................................................... 12

Auto Failover ................................................................................................................ 12

BCP Connectivity ......................................................................................................... 12

New IP Wide Area Network ............................................................................................. 13

NSE’s Nationwide Network ......................................................................................... 13

NSE’s Satellite Network .............................................................................................. 14

IP Connectivity Options.................................................................................................... 15

VSAT Based ................................................................................................................. 15

Lease line Based ........................................................................................................... 16

Lease line and VSAT combined ................................................................................... 17

New Components in Member end setup........................................................................... 18

TAP Server & TAP IP .................................................................................................. 18

Market Data Server ....................................................................................................... 18

NSE Subnet................................................................................................................... 18

Router............................................................................................................................ 18

IP IDU........................................................................................................................... 18

Changes in NSE applications............................................................................................ 19

Changes in Terminology................................................................................................... 20

Location Locking .......................................................................................................... 20

Dual locking.................................................................................................................. 20

NSEIL IP Migration Technical Write-up Version 1.0 of 20

Introduction

NSE provides a platform for online trading to the trading community of the

country. Its infrastructure allows for fairness and transparency in the nation’s trading

activity, by utilizing modern satellite technology and terrestrial leased line network to

connect traders across the country.

The system currently uses the X.25 protocol over the WAN to allow for high

performance yet reliable communication for the purpose of securities trading.

With the slow, but steady outdating of the X.25 protocol, a need is seen for the migration

of the Exchange’s WAN protocol to an alternate. TCP/IP is proposed as it is an industry

standard with both hardware and software resources being well available.

The Application and the network infrastructure, in its entirety, is being migrated to the

TCP/IP protocol.

With implementation of Trading Access Point (TAP), member end software have been

migrated to TCP/IP thereby having half the trading path migrated to IP. This way only

NSE provided applications and Network infrastructure will undergo IP changes.


Need for IP Migration

• Limitation imposed by current infrastructure

– Bandwidth cannot be increased beyond 128kbps

– No Expansion & Scalability

– X.25 technology has become obsolete with no further developments and

support from Equipment Manufacturers

– Un availability of Technical Skill set for the X.25 protocol

• Consolidation of Member infrastructure

– Leased lines

– Servers

• Lower cost to maintain and operate IP Lines

– Standard and widely used IP devices

• Better Connectivity & Redundancy

– Better Connectivity and uptime with the new IP Backbone

– Transparent Connectivity to BCP Site

• More open standard based information technologies to aid in speedy development

of products

– Improved broadcast


Timelines and Phases

TAP X.25 CM & FO

IP Migration

Production begins

IP Migration

Complete

Q1 2008 Q2 2008 Q3 2008

X.25 Co-existence IP


Migration Activity Plan

During the migration from X.25 to IP a member end setup will go through several phases

to finally get to the IP Migrated stage. During each stage there are several contingencies

available to ensure that the members trading activities are not impacted at all and

alternative paths are available as and when needed.

Existing Setup – X.25 without TAP

Most of the members will be having a connectivity similar to the as show in above

diagram. In such a setup the member is using complete X.25 Infrastructure and Softwares


Stage 1 Setup – X.25 with TAP

Several members are in Stage 2 of IP Migration where they have TAP for X.25 installed

and configured. In this stage the Member end software like CTCL and NEAT for Cash

and F&O are migrated to TAP protocol which is on TCP/IP. For simplicity all the TAP

applications are hosted on a single TAP server.


Stage 2 Setup - IP and X.25 co-existence

This is the stage where end to end IP Path will be made available to members. The X.25

and IP WAN will co exist during this stage. Members will be able to fall back to their

X.25 infrastructure in case the need for that arise. This will be a stability period for IP

changes. IP Router is a device used for Lease lines. Instead of IP Router a IP IDU will be

used for VSAT based connections.


Final Stage Setup - IP Migrated

The final stage end to end IP connectivity without any X.25 component will look as

shown above. Based on the migration progress and stability period for the IP components

NSE expects to have all the members in this stage by Q3 of 2008.


Schedule for Migration

Stage wise

Stage Start

Existing – X.25 without TAP Started

Stage 1 – X.25 with TAP Started

Stage 2 - X.25 and IP Co existence Aug 2008

Final Stage - IP Migrated Oct 2008

Geography wise

Area Start

Mumbai Aug 2008

Delhi Aug 2008

Amdavad Sept 2008

Kolkata Sept 2008

Chennai Sept 2008


New Features & Benefits with IP

Additional facilities available with the new IP Network.

Multiple Member end Scenarios

Different members have different trading needs. NSE has designed some member end

scenarios keeping in mind this varied need. The scenarios are explained in detail in the

section of IP Connectivity options.

The members will have following scenarios options to select from:

Single VSAT

Single Lease line

Single Lease line with VSAT backup

Dual Lease line terminating at One POP

Dual Lease line terminating at Two POPs

Higher Throughput & Infrastructure Consolidation

Since the X.25 bandwidth is limited, Member have invested in several 64kbps or 128kbps

links for meeting their trading volume needs. With introduction of IP 2 Mbps bandwidth

will be allowed. This will eliminate the need for multiple connects and the required

infrastructure to meet the volume requirements. By Consolidation of User IDs of multiple

X.25 media on a single IP Link with sufficient bandwidth member will save on

Infrastructure cost and improve manageability. Consolidation of multiple X.25 links is

advisable as IP has 2 Mbps links. Consolidation will be most feasible in a physical

location or premises of the Member where they have multiple X.25 links.


Improved Market data

NSE will provide a better quality Market Data with the commissioning of 2 Mbps IP

Links. This new market data will improve the rate refresh on the scripts being traded. The

new VSAT will also have capacity to transfer this high bandwidth Market Data.

Auto Failover

Uptime is very important in the trading business. To address this need NSE will allow

multiple service providers links to be terminated on the member end router. This router

will be configured to have connected lease lines in active passive auto failover mode.

This way the if one media fails the other media will start handling the traffic seamlessly.

BCP Connectivity

Business continuity is another important requirement in the securities trading industry.

NSE has a full fledged BCP site to ensure uninterrupted trading is available to the

members in case of any disaster at the Primary site at Mumbai. VSAT technology already

allowed members to connected to the BCP site for trading. With the new IP WAN even

the terrestrial lines will be able to connect to BCP seamlessly through the POPs. This will

further improve the uptime of business in case of adverse events man made or natural.


New IP Wide Area Network

NSE’s Nationwide Network

NSE is rolling out a new IP based Wide Area Network with Point of Presence (POP) at key

Trading centers like Mumbai, Delhi, Chennai, Kolkata etc.

A PoP is a place where leased line services are available to NSE members. NSE will have nine

(9) PoP’s spanned across the country. Members will have the option to subscribe to the nearest

PoP in the respective location.

The distribution of PoP’s spanned across the country is as below.

1. Mumbai (3 PoPs)

2. Delhi (2 PoPs)

3. Chennai (1 PoP)

4. Kolkata (2 PoPs)

5. Amdavad (1 PoP)

All the PoPs across the country will be connected to NSE Data Center located in Mumbai as well as the BCP site located in Chennai.

POPs


Service Provider is an entity that provides services (e.g Leased Line Services) to other entities.

The various Service Providers who will deliver services to NSE Members are as mentioned

below:

1. Tata

2. Reliance

3. Bharti

4. MTNL

5. BSNL

NSE’s Satellite Network

NSE will upgrade the current VSAT backbone to the advanced SkyEdge technology with

IP upgrade. This up gradation will allow members a 256 kbps interactive traffic capacity

and 2 Mbps of broadcast capacity. With the improved bandwidth members will also get

improvement in throughput for interactive and broadcast.


IP Connectivity Options

VSAT Based

Figure above shows the basic setup and connectivity at the members office for a VSAT

connection. All the components to the Left of the TAP server is already existing at the

members premises. Apart from these even the VSAT ODU at member location will be

reusable for IP Connectivity. A Server with two Network interface card (NIC) will be

used to host the TAP and NSE UDP server applications. NEAT and CTCL Applications

will interface with the TAP server on the Member LAN while the TAP server will

interface with NSE on the WAN using the NSE provided IP address. Each TAP server

will be assigned an WAN IP address by NSE. The WAN side IP address of TAP server is

also referred to as TAP IP address. The applications on the TAP server will be provided

by NSE. Also, NSE will provide the IP IDU. Please note that the once converted the

VSAT will not be usable for the X.25 communications.

Member Front Office LAN

CTCL Server

CTCL TWS

NEAT

Member’s TAP Server & VSAT Subnet

TAP Server

for

TAP CM /FO

& UDP Server

Application

Member Office

VSAT ODU

IDU - IP


Lease line Based

This is another option of member end scenarios available with IP. In this scenario we

have 2 medias terminating on a single router. NEAT, CTCL and other member front

office application need not undergo any changes if the member is in stage 2 or higher. A

TAP server with two NIC cards will be used to allow TAP to connect to Front office

applications and the NSE Host over the WAN. The router (provide by NSE) will have

one or more lease lines terminating. In case of multiple medias auto failover option will

be available for the members. In the above configuration a link will be primary for a

particular type of traffic (Interactive or Market Data). When the primary link for a traffic

fails the same traffic will seamlessly start flowing on the other link which is

preconfigured as backup for that traffic. This way both links will be usable and have a

backup in case of any failure. Member may opt for a slightly modified scenario with just

a single lease line too. This will cost the member auto failover facility as there is no

backup path.


Lease line and VSAT combined

This is a scenario for members who want VSAT as backup and Lease line as their

primary link for trading activities. In this scenario both lease line and VSAT will

terminate on the member end router. Router will be configured to use lease line as long as

the link is up and failover to the VSAT when the lease line faces some issues. This way

the VSAT is used as a pure backup only.


New Components in Member end setup

TAP Server & TAP IP

The server machine on which the TAP applications will be running is called as the TAP

server. Member can install the NSE provided TAP application on recommended

configuration machines. The TAP server is required to have 2 Network Interface Cards

(NICs). One NIC will be used to connect on the WAN and with the NSE provide TAP IP

address while the other one will be connected on the member office LAN for NEAT and

CTCL applications to connect. Location locking for a member will be done on the basis

of TAP IP. Each user will be allowed to be locked to one or more TAP IP.

Market Data Server

The server machine on which the NSE provided UDP server application will be running

is called as the Market Data server. This server has the same requirements as that of a

TAP server. Members may host both the NSE UDP Server application and TAP

applications on the same TAP server.

NSE Subnet

Every Member end scenario will be assigned a set of IP addresses. This set of IP

Addresses is called at the NSE Subnet and will be used for allocation of TAP Server IP

Address.

Router

For communication on IP Network using the lease lines, member end scenario will

require a Router. Scenario which do not have a single Lease line wont need a Router.

IP IDU

For communication on IP Network using the VSAT, member end scenario will require to

replace the X.25 IDU (Indoor Unit) with a IP IDU. Outdoor unit (ODU) for the VSAT

will be the same as X.25 and wont require a replacement.


Changes in NSE applications

NSE will provide IP Version of Trading Access Point (TAP) and NSE Broadcast Server.

The applications interfacing with these two software will not undergo any changes.

IP enabled TAP will use only the IP connectivity to the Exchange for communication.

Members in Stage 2 of IP Migration will be well verse with the TAP and its benefits.

Members can refer TAP circular dated 13 March 2008 available on NSE India website

[http://www.nseindia.com/content/circulars/faop10453.zip].

NSE UDP server will also connect to exchange on the IP link and relay the Market Data

on the members local LAN over the UDP protocol as always. NEAT and CTCL can be re

configured to receive the Market data received via the IP links easily.


Changes in Terminology

Location Locking

Location locking will be based on TAP IP address. Each NSE user id will be locked to at

least one TAP server. Based on the Member end scenario a TAP server may be connected

to one or more media (Lease line or VSAT). Thus, even though the TAP is connected to

more than one media, locking to one TAP IP will be considered as one locking only.

Dual locking

Current understanding of Dual Locking will change slightly. With IP, location locking

will be done on a TAP Server IP address. Dual locking will thus be across TAP IPs. A

TAP Server will be connected to a Member end router or IDU based on the scenario

selected by member.

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