Method and Device for Bidirectional Forwarding Detection under Condition of Parameter Update

A device for Bidirectional Forwarding Detection under a condition of parameter update, comprising a first router and a second router which establish a link, wherein

• the first router is configured to:
• modify packet sending parameters and/or packet receiving parameters;
• and send to the second router a message with an identifier of the modification of this time;
• wherein packet sending parameters and/or packet receiving parameters which are modified this time take effect after the first router receives a feedback message with an identifier of the modification of this time sent by the second router;
• the second router is configured to:
• return to the first router the feedback message with the identifier of the modification of this time after receiving the message with the identifier of the modification of this time sent by the first router.