Electrical computers and digital processing systems: multicomput – Computer-to-computer data routing – Alternate path routing
Reexamination Certificate
2006-08-15
2006-08-15
Dinh, Dung C. (Department: 2153)
Electrical computers and digital processing systems: multicomput
Computer-to-computer data routing
Alternate path routing
C370S216000, C370S395530, C714S004110
Reexamination Certificate
active
07093027
ABSTRACT:
A fast protection mechanism capable of maintaining end-to-end and fast local protection on the order of sub 50 ms for both VLAN only based connections and for connections that are based partially on VLAN technology and partially on MPLS technology. The present invention is suitable for use edge switches configured in a stack or ring topology. The NMS provisions both the main and alternative VLANs in each edge switch in the stack portions of the network. When a link failure occurs, the edge switches on either end of the failed link immediately switch all protected traffic going through that link to the alternative VLAN. The packets are then returned on the links over which they were received. Hello messages are used to signal the remote end that a link failure has occurred and that protected traffic must be switched to the main or alternative VLAN in accordance with the VLAN the Hello message was received on.
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Kluger Yoav
Raz Yaron
Shabtay Lior
Atrica Israel Ltd.
Dinh Dung C.
Zaretsky Howard
Zaretsky & Associates PC
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