Apparatus and method for detecting network failure

Details Apparatus and method for detecting network failure Apparatus and method for detecting network failure

2005-09-20

2009-06-09

Ngo, Ricky (Department: 2416)

Multiplex communications

Diagnostic testing

Fault detection

C370S235000, C370S244000, C370S252000

Reexamination Certificate

active

07545750

ABSTRACT:
The network failure detection apparatus is realized as a function of a terminal in a network. The network failure detection apparatus acquires packet reception statistic information on a port-by-port basis of a relay unit, and extracts a port having a large amount of packet reception per unit time. When there is one port having a large reception amount in a certain relay unit, the network failure detection apparatus decides that the L2(layer2) loop is occurred in the downstream direction of the port concerned. Also, when there are two ports having a large reception amount in a certain relay unit, the network failure detection apparatus decides that a loop is formed at the relevant two ports, in which the L2loop is occurred.

REFERENCES:
patent: 6836462 (2004-12-01), Albert et al.
patent: 2005/0099949 (2005-05-01), Mohan et al.
patent: 2001-197114 (2001-07-01), None
patent: 2004-360305 (2004-12-01), None

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