Abstract:
A failover transition system for a VLAN is disclosed in which a master switch and a standby switch are designated, as in the case of ESRP. When a network failure is detected, the master switch "bounces" or restarts auto-negociation of a set of physical ports on the VLAN. In this way, ports are forced to re-ARP to update their forwarding database information immediately rather than wait until expiration of an ARP max age timer, resulting in a decreased failover transition time.
Abstract:
An iterative method of correcting errors in a data block (164). Bad bytes are first identified using information derived from an 8B/10 encoding/decoding of the data block (164). Within each identified bad byte, suspect bits are subsequently identified using information derived from parity encoding of a row of the data block (164) in which the bad byte is located. Each suspect bit is then classified as either a confirmed error bit or as an unconfirmed error bit using information derived from parity encoding of a column of the data block (164) in which the suspect bit is located. Confirmed error bits are then corrected, the parity bits corresponding to the confirmed error bit reset, and the bad byte cleared. The process is then repeated if one or more bad byte remain in the data block (164).
Abstract:
A method and system for providing joint IP/Optical Layer restoration mechanisms for the IP over Optical Layer architecture, particularly for protecting against router failure within such architecture, includes any one of plural node elements participating in the detection and restoration of the joint IP/Optical Layer architecture upon the failure of a router in one of the nodes. The plural node elements may include, but are not limited to, one of plural routers and an optical cross-connect.
Abstract translation:一种用于为IP over Optical Layer架构提供联合IP /光层恢复机制的方法和系统,特别是用于防止这种架构内的路由器故障,包括参与联合IP /光纤的检测和恢复的多个节点元素中的任何一个 路由器在其中一个节点发生故障时的层架构。 多个节点元素可以包括但不限于多个路由器之一和光交叉连接。
Abstract:
A method of scheduling a processor to handle a plurality of connections with respective processing cycles. The method includes estimating, for at least one of the connections, whether the connection will receive a processing session during its current respective processing cycle if each of the connections which did not yet receive a processing session during its current processing cycle receives, during its current processing cycle, an unlimited processing session and scheduling one or more of the connections that did not yet receive a processing session in their respective processing cycle, to perform a limited processing session, responsive to results of the estimation.
Abstract:
A packet-switch system utilizes a linecard-to-switch (LCS) protocol to integrate linecards with a switch core. Since the linecards include a majority of the buffering of the system and are located physically away from switch core, the size of the switch core can be reduced in size. The LCS protocol is a label-swapping, credit-based, flow-control, which enables the system to operate without requiring such information as the number of port modules available within a switch core or what Qualities of Service (QoS) or multicast flows are available. In addition, the LCS protocol enables the linecards to contain and manage the majority of the buffers in the system, and also to control the data drop policy within the system.
Abstract:
A router fault tolerant network interface system (300) includes a switch circuit (302) configured to detect when a router fails in a multi-router local network. When a failed router (202) is detected, the switch circuit (302) waits for a time-out period to expire to allow convergence. The switch circuit (302) then intervenes when traffic from a server (106) to the failed router (202) is detected. The switch circuit (302) translates the MAC address of the failed router (202) to the MAC address of a functional router (104). Traffic from a server (106) originally directed to the failed router (202) is then redirected to a functional router (104). In a further refinement, the switch circuit (302) provides the MAC address of a functional router (104) in response to an ARP request from a server (106) to the failed router (202).
Abstract:
The invention relates to an ATM telecommunication switch for switching telecommunication connections, said telecommunication switch comprising incoming lines (304, 305), outgoing lines (330, 331), and a switching field (301) for switching any connection from an incoming line to a desired outgoing line, said switching field comprising inputs (306-309) for supplying connections to said switching field, and outputs (310-313) for supplying connections out of said switching field. The telecommunication switch of the invention is characterized in that it comprises a pre-selector (302) provided between said incoming lines (304, 305) and said inputs (306-309) for connecting a desired incoming line of said telecommunication switch to a desired input (306-309) of the switching field (301).
Abstract:
A fault-tolerant packet data switch comprising a butterfly switch and half-rings connecting outputs of the butterfly switch back to its inputs via a sequence of ring stations, augmented with secondary bypass links; and a method of adaptive routing in said switch.