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Methods and apparatus for randomly distributing traffic in a multi-path switch fabric

專利號
US10097479B1
公開日期
2018-10-09
申請人
Juniper Networks, Inc.（US CA Sunnyvale）
發(fā)明人
Philip A. Thomas; Sarin Thomas; Jean-Marc Frailong; Pradeep Sindhu
IPC分類
H04L12/947; H04L12/707; H04L12/935
技術領域
egress,switch,indicator,module,schedule,status,fabric,stage,data,port
地域： CA CA Sunnyvale

摘要

In some embodiments, an apparatus comprises a schedule module within a switch fabric system. At a first time, the schedule module is configured to access a list of status indicators associated with a group of egress port indicators. The list of status indicators includes a set of status indicators each of which has a value greater than a threshold. The schedule module is configured to randomly select a status indicator from the set of status indicators and configured to reduce the value of the selected status indicator. The schedule module is then configured to send the egress port indicator associated with the selected status indicator such that a data cell is sent from an egress port associated with that egress port indicator. At a second time, when the value of every status indicator from the list of status indicators is not greater than the threshold, the schedule module is configured to increase the value of every status indicator above the threshold.

說明書

In some embodiments, data cells can be routed through the switch fabric 200 using a random data path, including a second stage switch module 214 that is randomly selected by a first stage switch module 212, and/or a third stage switch module 216 that is randomly selected by the second stage switch module 214. Specifically, after receiving a data cell, a first stage switch module 212 can randomly select an egress port from a list of egress ports within the first stage switch module 212 to send the data cell to one of the second stage switch modules 214. An approach for randomly selecting an egress port from a list of egress ports is described in detail below with respect to FIGS. 4-5. Furthermore, in some embodiments, the second stage switch module 214 that receives the data cell can randomly select an egress port from a list of egress ports within the second stage switch module 214 to send the data cell to one of the third stage switch modules 216. In some other embodiments, the second stage switch module 214 that receives the data cell can send the data cell to a particular third stage switch module 216 from a particular egress port within the second stage switch module 214.

權利要求

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