computer division provides fast, reliable and robust communication network to the scientists/ engineers of RRCAT. RRCAT has implemented its own organization wide network named RRCATNet, which comprises of about 3800 nodes. All major buildings have their own internal network based on CAT5 / CAT6 and all these buildings are inter-connected over Gigabit Ethernet. Remote access has been provided using DSL technology.

Centralised authentication based Internet, email and intranet access has been provided on desktops. Protection against virus and spam has been provided on the network through a centralized antivirus solution.

Salient Features:

Physical Layer

• A 3800 node completely managed and switched network with 1400 PCs and other network devices.
  
• 1 Gbps backbones to 70 buildings using 100 managed switches.
  
• Ten OFC rings for connecting various buildings, with failover and load balanced configurations.
  
• Network Convergence time in a ring < 50 milli seconds.
  
• Network access using 8/2 & 24/1 Mbps DSL modems and 100Mbps/1Gbps Ethernet ports.
  
• Network Access control, in place on all the switched ports, thus allowing only registered devices to access the network.
  
• Loop detection on all edge ports.
  
• Two core switches (BD8810) commissioned in Fail-over and Load balancing mode.

• SPAM and VIRUS controlled, clustered Email services to 1900 users using IMAP/POP/SMTP protocols with QMAIL/POSTFIX as MTA and Outlook Express and web based ROUNDCUBE as MUA.
  
• Single Sign On setup with replicated LDAP based authentication servers.
  
• Internet access services for 2000 users using failover, load balanced and password protected proxy server setup.
  
• Secured DNS, WEB and MAIL services on Internet.
  
• Linux NAS based, password, virus protected and windows accessible drive on the network (ZDRIVE).
  
• Centralized automated high speed Backup Setup with four LTO-6 capacity tape drives and physical tape libraries of 60 slots and 2.5TB (Native) & 6.25 TB (Compressed) / slot capacity.
  
• Centralized antivirus update distribution.
  
• Anunet – Voice and Data/Email connectivity with other DAE units.
  
• DAEGRID – Computing services using grids in DAE.
  
• Video Conferencing – Over Internet/Anunet/DAEGRID networks.
  
• Secure VPN connectivity.
  
• All services provided using freeware and open source tools.

• Internet connectivity using failover and load balanced links of 34(1:4) Mbps and 100(1:2) Mbps links from BSNL.
  
• Connected to Anunet using 768Kbps VSAT link.
  
• Connected to DAE-Grid network using multiple 10/2 Mbps links.
  
• Connected to 34 Mbps (1:2) Internet links for providing Wi-Fi connectivity in Guest House.
  
• Connected to National Knowledge Network (NKN) using the 1 Gbps link, which also acts as additional Internet connectivity link.

• Physical layer management using Topology graphs and Network Management System (NMS).
  
• Network Access Control for device registration and authentication.
  
• Network status monitoring using in house developed Proactive Monitoring System with mail, screen popup and voice alerts.
  
• Internet traffic monitoring, logging, profiling and analyzing mechanism in place.
  
• Multiple layers of security for access of Intranet resources from Internet.
  
• Open Source and in house developed SIEM setup for Intrusion detection and prevention for all four layers. Provided using freeware and open source tools.

A data centre conforming to Rated-2/Tier-2 level of ANSI/TIA-942 data centre standard is commissioned. The data centre has been built by revamping/replacing the existing CPU hall and the associated capacity components. It has been designed using redundant capacity components. The data centre can accommodate 200 kVA of server load, distributed in 32 number of racks, with each rack of 42U size, capable of bearing 1200 Kgs of physical server loads. Each rack has also been equipped with metered Power Distribution Units (PDUs) for individual rack-wise load capacity monitoring and planning. The cooling of data centre has been achieved using five numbers of 15 TR Precision Air Conditioners (PACs), delivering cool air @110 Cubic Feet per Minute (CFM) per kW and operating in N+1 redundant mode. Two numbers of cold aisle containments have been created to house 16 numbers of racks per containment with cooling temperature of 20 ± 2 degrees centigrade maintained inside it. The input power supply to the PAC setup is provided using auto changeover setup connecting mains and the diesel generator power sources. The uninterrupted power supply to the server racks have been achieved using three numbers of 120 kVA UPS systems, working in N+1 redundant mode, with each UPS having a separate battery bank of 10 minutes backup time at full load. The input power supply to the UPS setup is provided using the auto changeover setup connecting mains and the diesel generator power sources. Very Early Smoke Detection Apparatus (VESDA) and Novec 1230 (FK-5-1-12 agent) gas based fire suppression systems have also been integrated in the data centre. Video surveillance and biometric access control setup has also been integrated in DCH-A for monitored access control of the servers hosted inside the data centre.

A data centre conforming to TIA-942 data centre standard is commissioned. It has been designed using redundant capacity components. The data centre can accommodate 200 kVA of server load, distributed in 16 number of racks, with each rack of 42U size, capable of bearing 1200 Kgs of physical server loads. The cooling of data centre has been achieved using four numbers of 18 TR Precision Air Conditioners (PACs), delivering cool air @14000 Cubic Feet per Minute (CFM) per PAC and operating in N+1 redundant mode. There is one cold aisle containment houses 16 numbers of racks maintains cooling at 20 ± 1 degrees centigrade maintained inside it. The input power supply to the PAC setup is provided using auto changeover setup connecting mains and the diesel generator power sources. The uninterrupted power supply to the server racks have been achieved using two numbers of 200 kVA UPS systems, working in redundant mode, with each UPS having a separate battery bank of 15 minutes backup time at full load. The input power supply to the UPS setup is provided using the auto changeover setup connecting mains and the diesel generator power sources. Early Smoke Detection system has been integrated in the data centre. Biometric access control setup has also been integrated in DCH-B for authorised access.