Multiplex communications – Diagnostic testing – Path check
Reexamination Certificate
2007-08-21
2007-08-21
Nguyen, Chau (Department: 2616)
Multiplex communications
Diagnostic testing
Path check
C370S249000
Reexamination Certificate
active
10326352
ABSTRACT:
A method for actively detecting link failures on a high availability backplane architecture. The backplane system includes redundant node boards operatively communicating with redundant switch fabric boards. Uplink ports of the node boards are logically grouped into trunk ports at one end of the communication link with the switch fabric boards. A probe packet is sent, and a probing timer is set whenever either a specified number of bad packets are received, or an idle timer expires. If a response to the probe packet is received before the probe timer expires then the link is deemed valid, otherwise the link is presumed to have failed. Preferably, either the node boards or the switch fabric boards are configured to properly handle a probe pack, which preferably has identical source and destination addresses.
REFERENCES:
patent: 5649100 (1997-07-01), Ertel et al.
patent: 6038219 (2000-03-01), Mawhinney et al.
patent: 6088328 (2000-07-01), McKnight
patent: 6246666 (2001-06-01), Purcell et al.
patent: 6285656 (2001-09-01), Chaganty et al.
patent: 6298039 (2001-10-01), Buskens et al.
patent: 6308282 (2001-10-01), Huang et al.
patent: 6381218 (2002-04-01), McIntyre et al.
patent: 6546425 (2003-04-01), Hanson et al.
patent: 6975587 (2005-12-01), Adamski et al.
patent: 2002/0004843 (2002-01-01), Andersson et al.
patent: 2003/0012222 (2003-01-01), Rinchiuso
patent: WO-00/79711 (2000-12-01), None
patent: WO 02/10930 (2002-02-01), None
PCI Industrial Computer Manufacturers; “CompactPCI Packet Switching Backplane Specification”; Sep. 5, 2001; Sections 1-5.4 and Appendices.
Cisco Systems Inc; “Configuring UDLD”; Online exerpt; URL:http://web.archive.org/web/20021002142321/www.cisco.com/universed/cc/td/doc/product/lan/cat5000/rel—5—2/config/udld.htm; Oct. 1, 1999.
Chang Rong-Feng
Lin Eric
Wang Linghsiao
Yik James Ching-Shau
Conexant Systems Inc.
Laubscher, Jr. Lawrence E.
Nguyen Chau
Park Jung
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