The GÉANT Automated Bandwidth Allocation across Heterogeneous Networks (AutoBAHN) system is a user-friendly tool for instantiating dynamic circuits over the global research and education (R&E) network infrastructures. The system has been developed as a pilot within the GN2 project and is a central unit to the next-generation GÉANT network. At the present AutoBAHN system is being developed and maintained under the GN3 project SA2.T5.
Networking resources are allocated, end-to-end, across multiple domains, creating a complex problem of coordination and dynamic re-configuration of resources within a number of administrative domains. The granularity of resource reservations in terms of bandwidth and duration is important, together with the required QoS parameters.
Because not all National Research and Education Networks (NRENs) deploy the same type of technologies, there are different ways of providing BoD services. AutoBAHN is being designed to support:
- Extended Layer 2 Virtual Local Area Networks (VLANs) based on gigabit-Ethernet (GE) connections.
- Point-to-point switched Layer 1 connections STM-1 to optical wavelengths, 1GE, 10GE).
Typically, an end-point in a NREN A needs to make a connection to an end-point in NREN B. To provide guaranteed end-to-end service with resource reservation, service requests must be co-ordinated across domains. This role is undertaken by instances of the AutoBAHN system deployed in each involved domain. The AutoBAHN system will not act as a replacement for existing control plane, signalling and provisioning capabilities. Instead it provides an integrated business layer for co-ordinated inter-domain provisioning, complementing existing control plane capabilities (where they exist) with AAI, inter-domain routing functionality,inter-domain monitoring, and so on.
AutoBAHN, acting as the intermediary between users (or applications) and the network, interprets user requests and translates them to requests to the network. The network itself must specify to the middleware what services are available and their corresponding quality parameters. Each network domain defines policies for use of networking resources as well as quality parameters and is able to express them through AutoBAHN. Users authenticated by identity and role may receive authorisation against the respective policies. The originality of AutoBAHN lies in ensuring that new network services are introduced to meet the requirements of next generation network users, overcoming the borders of physically and technically disjointed networks.
The emergence of GRID applications and peer-to-peer computing imposes new requirements on network services. The benefits of BoD services are most obvious where advanced requirements for network connectivity exist, especially when multiple domains are involved, capacity reservation needs to be supported in advance and circuits must be realised and released in a dynamic manner.
AutoBAHN has been deployed in the NRENs depicted in the following figure:
i2CAT is present in GÉANT project and participates in this task. The main role of i2CAT is to design improvements to AutoBAHN software as well as identify the current limitations to provide enhancements to them.
For further details please see the following web site:
This post was written by Steluta Gheorghiu