Techniques for detecting non-receipt of fault detection protocol packets

Active Publication Date: 2009-11-12
EXTREME NETWORKS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0013]Embodiments of the present invention provide techniques that assist in processing of failure detection protocol (FDP) packets. Techniques are provided that assist a CPU of a network device in processing incoming FDP packets. In one embodiment, a module is provided in a network device for detecting a

Problems solved by technology

For example, if a network device does not receive an FDP packet within a period of time associated with the FDP packet, then the network device may assume that there is a network failure somewhere in the network that prevented the expected FDP packet from reaching the network device.
However, due to the large periodic interval time values, the time required to detect network failures is also quite large (usually several seconds).
While this was acceptable in the past, it is no longer acceptable in today's larger and faster networks wherein a long failure det

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  • Techniques for detecting non-receipt of fault detection protocol packets
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  • Techniques for detecting non-receipt of fault detection protocol packets

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Embodiment Construction

[0039]In the following description, for the purposes of explanation, specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent that the invention may be practiced without these specific details.

[0040]Embodiments of the present invention provide techniques that assist in processing of failure detection protocol (FDP) packets. Techniques are provided that assist a CPU of a network device in processing incoming FDP packets. A failure detection protocol (or FDP) is intended to include any protocol, standard, procedure, or method in which packets are transmitted at periodic intervals for purposes of monitoring, detecting, or identifying a failure in a network. A packet transmitted according to an FDP is referred to as an FDP packet. Examples of FDPs that may be supported by embodiments of the present invention include OAM protocols such as Bidirectional Forwarding (BFD) protocol which is used to detect router link failures and

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Abstract

Techniques that assist in processing of failure detection protocol (FDP) packets. Techniques are provided that assist a CPU of a network device in processing incoming FDP packets. In one embodiment, a module is provided in a network device for detecting and flagging the non-receipt of FDP packets by the network device for one or more FDP sessions. In this manner, the task of detecting non-receipt of FDP packets is offloaded from the CPU of the network device. This enables the network device to support newer FDPs with shorter periodic interval requirements.

Description

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Claims

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Application Information

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Owner EXTREME NETWORKS INC
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