Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2005-07-18
2009-12-29
Ton, Dang T (Department: 2419)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S230000, C370S400000, C713S152000
Reexamination Certificate
active
07639688
ABSTRACT:
A method and system for protecting valuable resources within an autonomous system network. Address prefixes within the system are designated as valuable and a flag bit is associated with the address within routing tables of routers of the network. Interfaces to border routers are identified and when packets are received at those interfaces, the packets are flagged with a flag or tag bit. The destination address of the received packet is compared to the flag bit associated with the valuable resource prefix, and if the packet is directed to that resource the packet is dropped and/or logged, but the packet is not forwarded to that resource. In specific cases an interface from an external source may be configured to not create the flag or tag bit, wherein that packet will be delivered to the destination prefix of the packet.
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Filsfils Clarence
Previdi Stefano B.
Scudder John Galen
Ward David D.
Cesari and McKenna LLP
Cisco Technology Inc.
Kamara Mohamed
Ton Dang T
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