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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(shù)領(lǐng)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, various selection methods can be applied by switch modules of different stages within the switch fabric 700 to select a switch module of a subsequent stage or an edge device connected to the switch fabric 700 to send data cells. For example, switch modules 712 of the first stage, switch modules 713 of the second stage, and switch modules 714 of the third stage can apply the random selection method described with respect to FIGS. 3-5 to select an egress port to send data cells to a switch module of a subsequent stage; switch modules 715 of the fourth stage can apply a hash function method, as described with respect to FIG. 2, to select an egress port to send data cells to a switch module 716 of the fifth stage; and switch modules 716 of the fifth stage can apply a round robin selection method, as described with respect to FIG. 2 and FIG. 6, to select an egress port to send data cells to an edge device connected to the switch fabric 700.

權(quán)利要求

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