The backbone data network provides a wide variety of connectivity services for University institutions. The network itself is known as the Cambridge University Data Network and often referred to as the 'CUDN'.
Note: Much of the information here is written for IT staff with a background in data networking; it is not likely to be of much interested to the casual user.
At a basic level, the CUDN connects institutions within the Collegiate University with each other, as well as central services provided by the UIS and other institutions (such as central email and filestore services), and also to Janet. Janet is the UK education and research network, which interconnects higher and further education establishments within the UK and provides connectivity to these organisations to the internet through a number of providers.
However, the CUDN also offers a number of additional services, as well as basic network connectivity. These services are described here (along with links to more information):
- Routed IP data network connection
The basic, routed IPv4 and (optional) IPv6 connection to the University backbone network and Janet / the internet. An institution's main staff, student and research network will typically use this. A connection has a number of options. It can:
- be supplied via a PoP switch or a directly-routed BGP connection (or a combination of both).
- support multicast.
- use public and private IP addresses; the latter will be linked to Janet via the NAT service.
- MPLS virtual private network (VPN) service
The MPLS service allows private networks to be built using the existing CUDN infrastructure but traffic to be kept logically separate from the normal internet-routed space, except where explicitly interconnected. This is useful to support wholly-private networks (such as a security system) or internal institutional networks to be extended over the CUDN backbone.
- Infrastructure service networks
These support infrastructure other than traditional computer connections for equipment such as CCTV, BMS (Building Management Systems) as well as the University Telephone Network.
- VLAN services
To support switched / layer 2 connectivity, the CUDN supports a number of VLAN-based services.
Last updated: 6th January 2017