Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2005-08-23
2005-08-23
Pham, Chi (Department: 2663)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S395530
Reexamination Certificate
active
06934292
ABSTRACT:
A system and method for emulating a single router in a switch stack is described. The switch stack is connected to virtual local area networks (VLANs) and comprises a number of stack devices that can include routing devices (RDs) having interfaces to the VLANs and non-routing devices (NRDs). All of the interfaces of the RDs share the same router and VLAN configuration addresses, including router Media Access Control addresses. One RD is appointed as a master in the switch stack and all other RDs use the configuration addresses of the master. Each NRD is owned by a corresponding routing device according to an ownership algorithm. The shared configuration addresses allow the switch stack to appear as a “virtual router” to nodes belonging to VLANs connected to the switch stack.
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Ferris Derrick W
Pham Chi
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