Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2008-07-29
2008-07-29
Garber, Charles D. (Department: 4144)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S389000
Reexamination Certificate
active
11045427
ABSTRACT:
A packet forwarding apparatus wherein a routing control packet received from a network is forwarded to both active and standby routing modules, the standby routing module executes predetermined routing control information processing and sends identification information of the routing control packet to the active routing module, the active routing module executes predetermined routing control information processing, returns a response packet to a sender of the routing control packet, and determines a state of the standby routing module depending on whether an internal control packet has been received from the standby routing module and its contents.
REFERENCES:
patent: 2002/0060986 (2002-05-01), Fukushima et al.
patent: 2003/0043737 (2003-03-01), Tada
patent: 2003/0056138 (2003-03-01), Ren
patent: 11-154979 (1997-11-01), None
patent: 11-355392 (1998-06-01), None
patent: 2002-084313 (2000-09-01), None
Chris Gunner, “Reliable Routing for the Internet”, IEEE HPSR, May 27, 2002, 16 pages.
“High-Speed, Large Capacity, Highly Reliable IP Switching Node” GeoStream R900 Series, Product Report vol. 1 (High Reliability Version) Nov. 2001, pp. 1-18, and partial English translation, 9 pages.
A. Marquez, Esq. Juan Carlos
Campbell Matthew
Fisher Esq. Stanley P.
Garber Charles D.
Reed Smith LLP
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