Patent ID: 9614753
Date: 2017-04-04
CPC Classifications: H04L

Claim:
1. A method for Bidirectional Forwarding Detection under a condition of parameter update, comprising: a first router establishing a link with a second router; the first router making a first modification to packet sending parameters and/or packet receiving parameters, and sending to the second router a first message with an identifier of the first modification; the second router returning to the first router a feedback message with an identifier of the first modification after receiving the first message with the identifier of the first modification sent by the first router; the packet sending parameters and/or packet receiving parameters which are modified in the first modification taking effect after the first router receives the feedback message with the identifier of the first modification sent by the second router; when the first router makes a second modification to the packet sending parameters and/or packet receiving parameters, the first router sending to the second router a second message with an identifier of the second modification, the identifier of the second modification being different from the identifier of the first modification; wherein the identifiers of the first and second modification are serial numbers, and every time the first router modifies the packet sending parameters and/or packet receiving parameters, the first router increases the serial number by one, the first router does not make the modified packet sending parameters and/or packet receiving parameters take effect unless the feedback message with the serial number corresponding to the first modification is received by the first router.