Bidirectional forwarding detection (BFD) parameter negotiation method, apparatus and chip

A Bidirectional Forwarding Detection (BFD) parameter negotiation method, comprising:

• receiving, by a second apparatus, a BFD negotiation packet sent by a first apparatus and used for negotiating BFD parameters to be negotiated, wherein the BFD parameters to be negotiated comprise:
• Detect Mult, Desired Min Tx Interval, and Required Min Rx Interval;
• the BFD negotiation packet comprises a Required Min Echo Rx Interval field, a Detect Mult field, a Desired Min Tx Interval field, and a Required Min Rx Interval field, wherein the Required Min Echo Rx Interval field carries a first verification value generated by the first apparatus according to at least one of the BFD parameters to be negotiated, and the Detect Mult field, the Desired Min Tx Interval field, and the Required Min Rx Interval field respectively carry the BFD parameters to be negotiated;
• completing, by the second apparatus, negotiation of the BFD parameters to be negotiated according to the BFD negotiation packet;
• and
• upon successful negotiation, writing, by the second apparatus, the first verification value into a Required Min Echo Rx Interval field of a BFD negotiation response packet as a second verification value, and returning, by the second apparatus, the BFD negotiation response packet to the first apparatus, so as to instruct the first apparatus to check whether the first verification value and the second verification value match each other, determine, in response to a case that the first verification value and the second verification value match each other, that the BFD negotiation response packet is a response to the BFD negotiation packet and the negotiation of the BFD parameters is not an erroneous negotiation caused by BFD packet disorder, and determine, in response to a case that the first verification value and the second verification value do not match each other, that the BFD negotiation response packet is not the response to the BFD negotiation packet and the negotiation of the BFD parameters is an erroneous negotiation caused by BFD packet disorder.

A Bidirectional Forwarding Detection (BFD) parameter negotiation apparatus applied to a first apparatus, comprising a memory storing instructions and a processor in communication with the memory, wherein the processor is configured to execute the instructions to:

• generate a first verification value according to at least one of BFD parameters to be negotiated, wherein the BFD parameters to be negotiated comprise:
• Detect Mult, Desired Min Tx Interval, and Required Min Rx Interval;
• write the first verification value into a Required Min Echo Rx Interval field of a BFD negotiation packet used for negotiating the BFD parameters to be negotiated, wherein the BFD negotiation packet further comprises a Detect Mult field, a Desired Min Tx Interval field, and a Required Min Rx Interval field respectively carrying the BFD parameters to be negotiated;
• send the BFD negotiation packet to a second apparatus;
• receive a BFD negotiation response packet returned by the second apparatus upon successful negotiation, wherein a Required Min Echo Rx Interval field of the BFD negotiation response packet carries a second verification value;
• and
• check whether the first verification value and the second verification value match each other;
• determine, in response to a case that the first verification value and the second verification value match each other, that the BFD negotiation response packet is a response to the BFD negotiation packet and negotiation of BFD parameters is not an erroneous negotiation caused by BFD packet disorder;
• and determine, in response to a case that the first verification value and the second verification value do not match each other, that the BFD negotiation response packet is not the response to the BFD negotiation packet and the negotiation of the BFD parameters is an erroneous negotiation caused by BFD packet disorder.