Dynamic routing for multi-homed enterprise gateways
Alexander A. Kist · University of Southern Queensland ePrints (University of Southern Queensland) · 2006
Small and medium sized businesses often operate local area networks that connect via service providers to the Internet. If multiple connections are required, there are two options available: A gateway router that operates the border gateway protocol or a simpler gateway appliance that mostly uses load balancing and often network address translation. However, there is no simple way to multi-home small networks, when access links have diverse performance parameters, capacities or costs. Dynamic overflow routing addresses this issue in a straightforward way. This paper discusses dynamic routing and details, how bandwidth resources can be managed. It gives a simple estimate that helps to forecast resources for routing decisions and it underlines the need for a bidirectional gateway routing mechanism, accounting simultaneously for upstream as well as downstream traffic.