Communications of the ACM
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The routing function used for Burroughs Network Architecture (BNA) to determine the best routes for traffic through the network is known as the Burroughs Integrated Adaptive Routing System, or BIAS™1Based on the algorithm devised for the MERIT Computer Network [3], BIAS™ is a decentralized, deterministic system which adapts to changes in network topology automatically. The Current BIAS™ routing architecture incorporates improvements [1] in the original algorithm which significantly reduce the recovery time from failures of nodes or links and is virtually loop-free, even during recovery from those failures.BIAS™ automatically re-determines the best routes for traffic throughout the network in response to the following changes to the network topology:a node (an end system or intermediate system) is added to the network;a node is removed from the network;the cost of transiting a node is changed;a logical link (LAN, leased or switched circuit, X.25 virtual circuit) is added to the network;a link is removed from the network; and/orthe cost of transiting a link is changed.