Method of detecting non-responsive network flows

Details Method of detecting non-responsive network flows Method of detecting non-responsive network flows

2005-08-23

2005-08-23

Vanderpuye, Kenneth (Department: 2667)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

C370S235100

Reexamination Certificate

active

06934256

ABSTRACT:
A network device identifies a non-adaptive flow as follows. The network device drops packets on a random basis using a Random Early Detection (RED) algorithm. A classifier reads indicia of a selected flow from at least one field of a header of a packet received by the network device. The network device calculates a drop interval for packets of the selected flow dropped by the RED algorithm, in response to a time at which the packets were dropped. The network device then applies a statistical test to drop intervals of a plurality of flows in order to identify the non-adaptive flow.

REFERENCES:
patent: 6646988 (2003-11-01), Nandy et al.
patent: 6690645 (2004-02-01), Aweya et al.
patent: 2002/0089930 (2002-07-01), Aceves et al.
Sally Floyd and Van Jacobson Random Early Detection Gateways for Congestion Avoidance Aug., 1993 pp. 1-22.
V. Jacobson, K. Nichols, K. Poduri Cisco Systems RED in a Different Light Sep. 30, 1999 pp. 1-38.
Van Jacobson Notes on using RED for Queue Management and Congestion Avoidance Jun. 8, 1998.

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