Fast connection protection in a virtual local area network based stack environment
L Shabtay, Y Kluger, Y Raz - US Patent 7,093,027, 2006 - Google Patents
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 …
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 …
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