Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2008-04-22
2008-04-22
Pham, Chi (Department: 2616)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S352000, C370S401000
Reexamination Certificate
active
10184483
ABSTRACT:
A method for hitless restart of layer3packet forwarding includes replicating some but not all state information from a master management service module to a slave management service module. The master management service module builds a layer3routing table by participating in layer3routing protocols. The layer3routing table is stored in memory. The master management service module builds a first layer3forwarding table and stores the forwarding information in hardware. A slave management service module receives a copy of the first layer3forwarding table from the master management service module. When the master management service module fails, the slave management service module initiates construction of a routing table by participating in layer3routing protocols. Packet forwarding is not interrupted because forwarding using hardware entries continues. The slave management service module links entries in the newly constructed routing table to those stored in the forwarding table.
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Frick John Kevin
Grosser Donald B.
Mroz Michael D.
Extreme Networks, Inc.
Jenkins Wilson Taylor & Hunt, P.A.
Mills Donald L
Pham Chi
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