RFI I Brie iefin ing Converged Communications 7 August 2020 - - PowerPoint PPT Presentation

RFI I Brie iefin ing

Converged Communications 7 August 2020

SITA SOC Ltd 2

Content – SIT SITA Network Archit itecture

❖ Executive summary ❖ SITA MPLS network current state

➢ Layer-3 ➢ Layer-2 ➢ Current network architecture

❖ RFI Requirements ❖ SITA proposed SDN Architecture ❖ New SITA Layer-2 topology ❖ SITA internet perimeter ❖ End

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Executiv ive Su Summary ry

Cur urrent Sta tate te of

• f the

he Network 2 The he futu uture sta tate te of

• f Netw

twork? 3 2007/2008 – Whe Where it sta tarte ted? 1

• The existing SITA Core network (known as

the SITA NGN) was designed in 2007 and built in 2008 to fulfill requirements set out during that period.

• At the time the following hardware was

deployed:- 1. Cisco 7609 routers 2. Cisco 12000 series routers

• In 2015 SITA refreshed hardware to Cisco

ASR9010 router.

• There are still Cisco 7609 routers that have

remained on the network.

• Overall Layer-2 topology remained the same.
• SITA is embarking on a network

transformation programme to modernise its Core network to Software Defined Network (SDN). SITA is faced with a challenge related to cashflow and it cannot invest on upfront capital expenditure (CAPEX) to fund its strategic infrastructure modernisation programmes.

SITA SOC Ltd 4

SIT SITA MPLS S curr rrent state

La Layer-3 state:

❖ 4 x Super PoPs and 21 Aggregation

PoPs spread across the country.

❖ 54 X Cisco ASR 9010 routers. ❖ 13 X Cisco 7609 routers (End-of-Life) ❖ 2 x Cisco 7200 routers (BGP Route

Reflectors) – (End-of-Life)

❖ 49 X Channelized E1s ❖ 5 X Data Centres (Centurion, BETA,

Cape Town, George and Pietermaritzburg) La Layer-2 state:

❖ 55 Core links ❖ Single Points of Failure

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SIT SITA MPLS S network rk archit itecture

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Curr rrent La Layer-2 2 topolo logy (Sin Single le Poin int of failu ilure)

NC NC EC

❖ Cap

ape Town PoP

• P is

is Sin ingle le Poi

• int of
• f Fail

ailure for th three Provin inces.

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Proposed new Layer-2 topolo logy

❖

Introduction of

• f Na

Nation

• nal an

and Regi egion

• nal

l ri rings gs (Me (Metro-Ethernet)

❖

Com Complete el elimination of

• f

Si Singl ngle Poi

• ints

s of

• f Failu

lure.

❖

Not Not pa part of

• f the

he RFI FI, but but thi his s is to

• gi

give ve bi bidders s a view of

• f wh

what SIT SITA A is wor

• rkin

ing g on

• n from
• m a

Layer-2 tr transmis issio ion pe persp spectiv ive.

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SIT SITA In Internet perim rimeter c curr rrent state

Cen Centurion

• n:

❖ Internet router is Cisco 6509E with 10gbps line cards ❖ Government Internet Exchange (GIX) router is Cisco

6509E with 10Gbps line cards

❖ Provider Edge router is Cisco 6506 – 10Gbps line cards

Cap Cape Town wn:

❖ Internet router is Cisco 7604 with 10Gbps line cards. ❖ Government Internet Exchange (GIX) router is Cisco

6509E with 10Gbps line cards

❖ Provider Edge router is Cisco 6506 with 10Gbps line

cards KZ KZN:

❖ Pietermaritzburg has Cisco 6509E ❖ Provider Edge router is Cisco 6506. ❖ Two internet breakout points in Centurion

and Cape Town.

❖ Upstream links to transit provider are

10Gbps.

❖ SITA has its own ASN, its own public IP

address space and is in the process of implementing peering with various networks

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SIT SITA In Internet and DMZ archit itecture

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SIT SITA Requir irements

❖ A proposed detailed design that will transform the current SITA MPLS network to a Software Defined

• Network. The SDN solution should provide resiliency, scalability, and high availability. SITA is currently

executing several critical in-flight programmes, detailed below, that are directly dependent on the network being highly available and able to scale:

• Cloud and legacy based mainframe and midrange services
• E-Government services
• SA-Connect and other provincial broadband projects to enable connectivity to services

❖ The response needs to propose options of strategic partnership and funding model/s such as,

Consortiums, Joint Ventures, Rent to Own or other types of models that industry has the appetite for in the context of shared risk and return. The underpinning principle of the proposed models is that SITA must have full control of key assets to ensure that the state is not at risk. The partnership and any related funding model/s should incorporate a plan of action for the SP/s to layout capital upfront and look at a joint recoupment model together with a robust onboarding programme of implementation. This must include risk and reward sharing, detailed cost, cashflow, sustainability and other financial views over the period of partnership as well as value to SITA beyond this period. The proposed options of the industry partnership and related funding model/s must cover:

• Five (5) year model; and
• Ten (10) years model.

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Proposed SD SDN Archit itecture

Questions?