A Physical Topology Discovery Method Based on AFT of Downstream Constraint[J]. Acta Electronica Sinica, 2016, 44(8): 1864-1872. DOI: 10.3969/j.issn.0372-2112.2016.08.014.
Network physical topology discovery is very important for network management and application
the physical topology discovery based on AFT is a hot topic on current study.However
the incomplete AFT of network nodes in real network leads to the hardness of physical topology discovery.Based on decreasing the demand for the completeness of AFT in topology discovery
this paper defines three constraints of AFT
and proposes a tree-chopping algorithm based on AFT satisfying downstream constraint to discover the physical topology of a subnet.The proposed algorithm decreases the constraints for the completeness of AFT greatly
and demands the loosest constraint in physical topology discovery relying solely on downstream ports.The correctness and efficiency of the proposed algorithm is verified by the simulation experiment
and the algorithm applicability to real network is verified by deploying the algorithm in a real network management system.