Availability analysis of a broadband IP network in Taiwan

A broadband IP network has been implemented by Chunghwa Telecommunication Co. to provide customers better Internet services in Taiwan. The network backbone is mainly based on Nortel Passport ATM Switches and Service Selection Gateways. This paper proposes a method to measure the availability of Internet service and an approach to predict the availability of IP-VPN end-to-end service for the broadband IP network in Taiwan. According to the availability analysis and prediction, the results show that the IP network meets the requirement of Service Level Agreement (SLA) and actually, the IP network is operated in a stable and reliable status.