W4-ch1

BSNL Data Network

• Objectives of this chapter: understand different projects for Data Network, Network Architecture, Project 1 and Project 3, Multiplay Broadband, and MNG PAN.

Network Architecture

• Node types: A1, A2, A3, and A4, with different numbers of cities and specific devices (Core router - Cisco 12416, Edge Router - Cisco 7613, etc.)
• MPLS network has 129 Core Routers and 459 Edge Routers.
• 2-layer centrally managed IP backbone network designed to provide reliable routes.

Network Architecture of Project 1

• Layer - 1 Core network (A1, A2, and A3 cities) has high-speed Backbone (STM-64) and high-end fully redundant Core routers.
• Layer - 1 nodes consist of high-end fully redundant Core routers and are interfaced to Edge routers through Gigabit Ethernet interfaces.
• The system supports provisioning, billing, customer care, accounting platform, and billing for the complete range of IP-based services.

Messaging Solution

• Components: Messaging, DNS, AAA, MMP, LDAP, SMTP IN & OUT, Messaging Servers, Address Book Servers, etc.
• Salient aspects: setting up a proven, robust, scalable Messaging Solution with best-in-class security components.

Storage Platform

• Components: SAN Switch & SAN Storage, Tape Library, Staging Servers, etc.
• Fast, Reliable & Scalable storage devices are required for storing user mailboxes, billing data, etc.
• Storage device should be compatible with servers from major companies like HP, IBM, SUN, Dell, etc.

System Dimensioning

• User base will be serviced through 5 Messaging and associated Storage systems in 5 cities.
• Associated messaging system will be upgraded in phases correspondingly.

Billing System

• Capable of providing electronic versions of bills to customers over the Internet.
• Creation/modification of service, processing Service requests in real-time and non-real-time, and accounting in real-time.

Security Systems

• Load Balancers, Firewall Appliances, Intrusion Detection System, Antivirus system, etc.

Network Operation Center (NOC)

• Provides facility for centralized Network Management and end-to-end Provisioning of multiple services.
• The NOC shall have a single view of the entire network services being delivered country-wide.
• The servers for the NOC shall be connected through a Gigabit Ethernet link from Core router with three zones of firewall within the Centre.

Multiplay Broadband

• Triple play service provides Data (Internet), Voice (VoIP), and Video.
• Components: L3PE (MCR / PE Router), BNG (Broadband Network Gateway), RPR Tier-1 Switch, RPR Tier-2 Switch, OC LAN Tier-2 Switch, DSLAM, and DSL Tester.

Metro Core Routers

• Providing access to the Broadband Multiplay NW at A1, A2 locations of NIB2.
• Total 12 routers implemented as Metro Ethernet Project.
• 2 routers each at 6 locations (Bangalore, Chennai, Kolkata, Pune, Hyderabad, and Ahmedabad).

JTO Phase II (DNIT) Overview

• JTO Phase II (DNIT) is a data network and IT project that provides a comprehensive network infrastructure for BSNL data network.
• The project aims to provide a common IP infrastructure that supports all smaller networks and sub-networks.

Network Architecture

• The network architecture consists of a 2-layer IP and MPLS network.
• The Core Network (Layer 1) is a high-speed backbone network that provides packet forwarding between core nodes.
• The Edge Network (Layer 2) provides customer access, enforces QoS, and supports MPLS edge functionality.

Services

• Direct Ethernet Access Services: provides broadband "always-on-internet" access using Fiber-to-the-building.
• Layer 2 MPLS VPN Services: provides point-to-point connectivity between corporate LAN sites.
• Layer 3 MPLS VPN Intranet and Extranet Services: provides LAN interconnectivity between multiple corporate LAN sites.
• Managed Customer Premises Equipment (CPE) Services: provides managed CPE services to customers.
• Value Added Services: includes encryption, firewall, and network address translation (NAT) services.

Data Centre Services

• Data centre services are available at Bangalore, Delhi, and Mumbai.

Network Infrastructure

• The network infrastructure is designed to provide IP network access, both on retail and wholesale basis, to DSL and leased access customers.
• The network supports data, voice, and video applications over Layer 2 and Layer 3 MPLS VPNs.
• The network provides a common IP infrastructure that supports all smaller networks and sub-networks.

Node Configuration

• There are 4 types of nodes: A1, A2, A3, and A4, each with different capabilities and configurations.
• The nodes are configured in a full mesh with link bandwidths of STM-64.
• The Edge routers in cities are connected to the Core layer either locally through Gigabit Ethernet interfaces or remotely through dual homed STM-16/STM-1 links.

Messaging Services

• The messaging services are provided through 5 messaging and associated storage systems that will be set up in 5 cities.
• Each city is connected through the IP backbone.

Security Systems

• The security systems include load balancers, firewall appliances, intrusion detection systems, and antivirus systems.

Network Operation Center (NOC)

• The NOC provides a centralized network management and end-to-end provisioning of multiple services.
• The NOC is connected to the Core router through a Gigabit Ethernet link with three zones of firewall within the Centre.
• The NMS of NIB-II project 1 is the comprehensive NMS for entire NIB-II, including NIB-I, MPLS VPN.

Service Level Agreement (SLA)

• The network supports SLA, which ensures a certain level of service quality and performance.

Project 1 Overview

• Project 1 is an MPLS-based IP network infrastructure that initially covers 71 cities along with associated NMS, PMS, firewall, and caching platforms.
• The project provides a cost-effective way to enhance customer networking quality by providing a single connection from the customer's office router to a service-provider edge router.

JTO Phase II Data Network & IT

• JTO Phase II (DNIT) Version 1.0 was released in Sep 2021 and is for restricted circulation.

MNG-PAN

• MNG-PAN (MPLS-Based Next Generation Packet Aggregation Network) incorporates MPLS-TP (MPLS-Transport Profile) technology for transport network of telecom services.
• It is an advanced packet aggregation network solution designed for efficient multi-service aggregation of voice, video, and data traffic from various access technologies.
• MNG-PAN collects customer traffic from different access broadband networks (e.g., DSL, FTTH, MSAN, 3G Node B, Wi-Max) and hands it over to the IP-MPLS core network.
• The equipment supports bridging functionality between MPLS-TP and IP/MPLS domains.

MNG-PAN Architecture

• The typical architecture of MNG-PAN consists of PAN-COAU (Packet Aggregation Network – Central Office Aggregation Unit) switch and OC-PAN (Other City Packet Aggregation Network) switch.
• The PAN ring aggregates traffic from all nodes and hands it over to the upper MNG-PAN ring.
• The COAU switch of the PAN ring aggregates traffic from all PAN nodes and hands it over to the IP-MPLS core.

Project 1

• Project 1 involves deploying an MPLS-based IP network infrastructure covering 71 cities along with associated NMS, PMS, Firewall, and Caching platforms.
• The initial city-wise categorization of nodes under NIB-II Project 1 is given in Table.

Limitations of Existing Network

• The existing network has bottlenecks at the aggregation network layer due to heavy traffic from access network layer (e.g., cascaded DSLAMs, BSNL OLTEs, Third Party OLTEs, RNC Node-B, WiFi hotspots, ILLs, etc.) to aggregation network.
• Heavy traffic of OCLANs, cascaded OCLANs, and connected access network layer NEs aggregating to RPR also contributes to the bottleneck.

Why MNG PAN

• MNG PAN addresses the limitations of the existing network by:
  • Increasing redundancy and capacity of the network
  • Bandwidth up-gradation from 1GE to 10GE or 100GE with more number of uplinks to BNG
  • Rings of access network equipment are also possible
  • Stability in the network
  • Large network area coverage

Broadband Multiplay Project Components

• L3PE (MCR / PE Router of NIB-2 Project 1 – Supplied by HCL)
• BNG – Broadband Network Gateway-Connects Multiplay Network to NIB2 Backbone (Project 1)
• RPR Tier-1 Switch -Provides connectivity from BNG to RPR Tier-2 Switch
• RPR Tier-2 Switch
• OC LAN Tier-2 Switch
• DSLAM
• DSL Tester

Metro Core Routers

• Total 12 routers implemented as Metro Ethernet Project
• 2 routers each at 6 locations:
  • Bangalore (A1) – 112416 and 112410
  • Chennai (A1) – 112416 and 112410
  • Kolkata (A1) – 112416 and 112410
  • Pune (A2) – 2*12410
  • Hyderabad (A2) – 2*12410
  • Ahmedabad (A2) – 2*12410

JTO Phase II (DNIT) Overview

• JTO Phase II (DNIT) is a data network and IT project that provides a comprehensive network infrastructure for BSNL data network.
• The project aims to provide a common IP infrastructure that supports all smaller networks and sub-networks.

Network Architecture

• The network architecture consists of a 2-layer IP and MPLS network.
• The Core Network (Layer 1) is a high-speed backbone network that provides packet forwarding between core nodes.
• The Edge Network (Layer 2) provides customer access, enforces QoS, and supports MPLS edge functionality.

Services

• Direct Ethernet Access Services: provides broadband "always-on-internet" access using Fiber-to-the-building.
• Layer 2 MPLS VPN Services: provides point-to-point connectivity between corporate LAN sites.
• Layer 3 MPLS VPN Intranet and Extranet Services: provides LAN interconnectivity between multiple corporate LAN sites.
• Managed Customer Premises Equipment (CPE) Services: provides managed CPE services to customers.
• Value Added Services: includes encryption, firewall, and network address translation (NAT) services.

Data Centre Services

• Data centre services are available at Bangalore, Delhi, and Mumbai.

Network Infrastructure

• The network infrastructure is designed to provide IP network access, both on retail and wholesale basis, to DSL and leased access customers.
• The network supports data, voice, and video applications over Layer 2 and Layer 3 MPLS VPNs.
• The network provides a common IP infrastructure that supports all smaller networks and sub-networks.

Node Configuration

• There are 4 types of nodes: A1, A2, A3, and A4, each with different capabilities and configurations.
• The nodes are configured in a full mesh with link bandwidths of STM-64.
• The Edge routers in cities are connected to the Core layer either locally through Gigabit Ethernet interfaces or remotely through dual homed STM-16/STM-1 links.

Messaging Services

• The messaging services are provided through 5 messaging and associated storage systems that will be set up in 5 cities.
• Each city is connected through the IP backbone.

Security Systems

• The security systems include load balancers, firewall appliances, intrusion detection systems, and antivirus systems.

Network Operation Center (NOC)

• The NOC provides a centralized network management and end-to-end provisioning of multiple services.
• The NOC is connected to the Core router through a Gigabit Ethernet link with three zones of firewall within the Centre.
• The NMS of NIB-II project 1 is the comprehensive NMS for entire NIB-II, including NIB-I, MPLS VPN.

Service Level Agreement (SLA)

• The network supports SLA, which ensures a certain level of service quality and performance.

Project 1 Overview

• Project 1 is an MPLS-based IP network infrastructure that initially covers 71 cities along with associated NMS, PMS, firewall, and caching platforms.
• The project provides a cost-effective way to enhance customer networking quality by providing a single connection from the customer's office router to a service-provider edge router.