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US Patent 11805036 Detecting failure of layer 2 service using broadcast messages

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
11805036
Patent Inventor Names
Stephen Tan
Rahul Mishra
Akhila Naveen
Jayant Jain
Sami Boutros
Kantesh Mundaragi
Date of Patent
October 31, 2023
Patent Application Number
17346255
Date Filed
June 13, 2021
Patent Citations
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US Patent 11003482 Service proxy operations
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US Patent 11411863 Service chain header and metadata transport
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US Patent 11438257 Generating forward and reverse direction connection-tracking records for service paths at a network edge
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US Patent 11438267 Method and system for service switching using service tags
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US Patent 11467861 Configuring distributed forwarding for performing service chain operations
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US Patent 11496606 Sticky service sessions in a datacenter
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US Patent 11528213 Sharing routes using an in-memory data store in a distributed network system
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US Patent 11528219 Using applied-to field to identify connection-tracking records for different interfaces
...
Patent Primary Examiner
‌
Gbemileke J Onamuti
CPC Code
‌
H04L 43/0805
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H04L 41/0668
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H04L 43/10
Patent abstract

Some embodiments provide a method for detecting a failure of a layer 2 (L2) bump-in-the-wire service at a device. In some embodiments, the device sends heartbeat signals to a second device connected to L2 service nodes in order to detect failure of the L2 service (e.g., a failure of all the service nodes). In some embodiments, the heartbeat signals are unidirectional heartbeat signals (e.g., a unidirectional bidirectional-forwarding-detection (BFD) session) sent from each device to the other. The heartbeat signals, in some embodiments, use a broadcast MAC address in order to reach the current active L2 service node in the case of a failover (i.e., an active service node failing and a standby service node becoming the new active service node). The unidirectional heartbeat signals are also used, in some embodiments, to decrease the time between a failover and data messages being forwarded to the new active service node.

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