The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2020
Filed:
Jun. 27, 2018
Amazon Technologies, Inc., Seattle, WA (US);
Srinivasan Ramabadran, Sunnyvale, CA (US);
Amazon Technologies, Inc., Seattle, WA (US);
Abstract
A network switch having hardware thereon for transmitting probes to neighbor devices for exercising forwarding states (e.g., layer 2 and layer 3) on the switch. A light-weight agent resides on one or both of neighbor network devices and can be used to control the testing. One or more probes originating from the source network device (device A) from a local CPU are routed on the same network device A in hardware and sent out on a link towards a peer device (device B). The probes purposefully include a time-to-live (TTL) parameter designed to expire when the probe reaches the peer. Peer device B captures the probe using layer 3 hardware because of the TTL parameter generates an error, which causes the probe to be transmitted to a CPU. The CPU transmits the probe back to network device A as a TTL expiration error.