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On-switch policy rule caching for data communication switch

A data communication and switch technology, applied in data exchange network, data exchange through path configuration, electrical digital data processing, etc., can solve problems such as low efficiency

Inactive Publication Date: 2008-01-23
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the same policy rule can be applied to different flows seen on the switch, the requirement to contact a directory server and download a policy rule for each flow is very inefficient

Method used

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  • On-switch policy rule caching for data communication switch
  • On-switch policy rule caching for data communication switch
  • On-switch policy rule caching for data communication switch

Examples

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Embodiment Construction

[0019] Figure 1 shows a network where on-switch policy rule caching is combined with in-band QoS provisioning. QoS provisioning in conjunction with path establishment protocols, such as Resource Reservation Protocol (RSVP), may include QoS provisioning in conjunction with data packet forwarding processing. The network includes switch 140 having switch modules 150 , 160 , and 170 that support external devices including end stations 110 and 112 , devices in backbone network 120 , and directory server 130 . The switch 140 includes a management module 180 linked to the switching modules 150, 160 and 170 via a data bus 187 for sending data traffic. The management module 180 is also linked to the switching modules 150, 160, and 170 via a management bus 188 for sending management traffic including QoS information for the various flows. Management module 180 includes QoS mapper-classifier 181 , QoS manager 182 , policy manager 183 , QoS driver 184 , source learning module 185 and pol...

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Abstract

On-switch rule caching for facilitating quality of service (QoS) provisioning. Policy rules downloaded from a directory server (330) are cached on a switch (340) for a determinate duration to enable application in provisioning QoS for multiple flows. Active policy rules are aged-out in response to expiration of a time-to-live value associated with a policy rule. If the time-to-live has expired, a "stale" policy rule is removed from a rule cache (386), and a "fresh" policy rule is downloaded from the directory server (330). A time-to-live value may be increased in response to each application of a policy rule. On-switch rule caching may be applied in conjunction with out-of-band QoS provisioning, i.e. QoS provisioning conducted in connection with a path set-up protocol such as Resource Reservation Protocol (RSVP) (385), or in-band QoS provisioning, i.e. QoS provisioning conducted in connection with the data packet forwarding process.

Description

[0001] related application [0002] This application claims priority to U.S. Provisional Patent Application Serial Nos. 60 / 160560, "Quality of Service Policy Manager," 60 / 160520, "Quality of Service System Architecture," and 60 / 160483, "Quality of Service Manager," which All three applications were filed on October 20, 1999, and are incorporated herein by reference in their entirety. technical field [0003] The present invention relates generally to data communications switches, and more particularly to on-switch policy rule caching for data communications switches. Background technique [0004] Datacom switches are getting smarter. While traditional data communications switches often provide indiscriminate first-in-first-out (FIFO) packet delivery, more recent data communications switches often deviate from FIFO packet order in providing different quality of service (QoS) for different flows. QoS first became popular in cell-switched ATM networks, but quickly moved to pa...

Claims

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Application Information

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IPC IPC(8): G06F13/00H04L12/28H04L12/801H04L12/851
CPCH04L47/2441H04L47/10
Inventor 艾伦·K·巴特基托马斯·蒂斯·贾丁斯D·布赖恩·埃金顿L·米歇尔·古德温克里斯托弗·马丁迈克尔·E·希伊
Owner ALCATEL LUCENT SAS
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