As part of a broader organisational restructure, data networking research at Swinburne University of Technology has moved from the Centre for Advanced Internet Architecture (CAIA) to the Internet For Things (I4T) Research Lab.

Although CAIA no longer exists, this website reflects CAIA's activities and outputs between March 2002 and February 2017, and is being maintained as a service to the broader data networking research community.

BART (Broadband Access Research Testbed)

BART Testbed Capablities

Default Network Configuration

In its default configuration BART deploys a virtual Internet which is connected to three different ISPs.

  1. ISP-1 services ADSL customers through the BART DSLAM. Customers may be allocated any DSL Profile supported by the DSLAM (up/downstream rates). Customers connect to the ISP using PPPoE (PPP over Ethernet)
  2. ISP-2 also services its customers through the BART DSLAM. Customers may also be allocated any DSL Profile supported by the DSLAM. Customers connect to the ISP using PPPoE (PPP over ATM)
  3. ISP-3 services cable modem customers through the BART DOCSIS Cable Network. A single shared DOCSIS service is provided

Each ISP consists of an internal (ISP-side) network running at 100Mbps. Internal ISP networks are routed onto the virtual Internet network which is implemented as a 100Mbps switched Ethernet network. Access to the "real" Internet is provided by a NAT Router onto the Swinburne Network.

The result of the design is that servers can be placed within either an individual ISP network OR the Virtual Internet. Similarly, real Internet servers can be access by BART Clients via the NAT router. ISP-based servers can be rate limited via their implementation.


The default BART configuration is not permanent and BART can be re-modelled to suit the any individual experimental requirements. The default configuration allows for some flexibility through server deployment within individual ISP networks and the Virtual Internet. Similarly, the physical wiring of the BART equipment allows deployment of BART client and servers anywhere within the CAIA lab rooms (EN605b, EN605c and EN613).

Below is a list of some of the capabilities of the BART Testbed. This list is provided to give you an idea of what is possible under the current configuration and to get our researchers thinking of possible uses for the BART testbed.

  • The BART testbed consists of 10 DOCSIS Cable Modems.
  • The BART testbed consists of 12 ADSL Modems
  • The cable modems sit on a common coaxial cable tree off a single Cable Modem Termination System (CMTS).
  • The BART DSLAM offers a full choice of ADSL1 line rates in interleaved mode
  • It is possible to implement multiple, concurrently operating virtual ISPs and run independent, non-interfering experiments based around such virtual ISPs.
  • Servers can be built and configured to run at the virtual ISP, including DHCPD, DNS, Web, Mail, Proxy, RADIUS (or whatever is required).
  • Network configurations can include rate-limiting and traffic shaping.
  • For futher information, contact Jason But.
Last Updated: Friday 16-Mar-2007 20:08:54 AEDT | Maintained by: Jason But ( | Authorised by: Grenville Armitage (