Path active measurement method based on open shortest path prior message Internet protocol
An open shortest path, Internet protocol technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of passive measurement methods such as powerlessness, and achieve the effects of ensuring novelty, expanding measurement space, and enhancing detection capabilities
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[0030] Example 1:
[0031] An active measurement method for IP paths based on OSPF packets. Set the value of the measurement process or thread identification variable ident to 3, set the path maximum hop threshold Max_hop to 30, and set the threshold max_p_hop of the number of probe packets sent per hop to 3;
[0032] For a given detection target address D, set the initial value of the message number variable p_seq to 1, and set the initial value of the survival time variable TTL to 1;
[0033] Construct an IP message encapsulating an OSPF Hello message as a probe message. The time-to-live TTL field in the IP message header records the value of the time-to-live variable TTL, and the protocol number field records a value of 89, indicating that the encapsulated OSPF protocol message is. The source IP address field records the IP address of the host that sent this message, the destination IP address field records the given detection target address D; the IP message identification IP_ID fie
Example Embodiment
[0038] Example 2:
[0039] An active measurement method for IP paths based on OSPF packets. Set the value of the measurement process or thread identification variable ident to 5, set the maximum hop threshold of the path Max_hop to 32, and set the threshold max_p_hop of the number of probe packets sent per hop to 2;
[0040] For a given detection target address D, set the initial value of the message number variable p_seq to 1, and set the initial value of the survival time variable TTL to 3;
[0041] Construct an IP message encapsulating an OSPF Link State Acknowledgment message as a probe message. The time-to-live TTL field in the IP message header records the value of the time-to-live variable TTL, and the protocol number field records the value 89, indicating The OSPF protocol message is encapsulated. The source IP address field records the IP address of the host sending the message, the destination IP address field records the given detection target address D; the IP message identi
Example Embodiment
[0046] Example 3:
[0047] An active measurement method for IP paths based on OSPF packets. Set the value of the measurement process or thread identification variable ident to 2, set the path maximum hop threshold Max_hop to 33, and set the threshold max_p_hop of the number of probe packets sent per hop to 5;
[0048] For a given detection target address D, set the initial value of the message number variable p_seq to 3, and set the initial value of the survival time variable TTL to 1;
[0049] Construct an IP message encapsulating an OSPF Hello message as a probe message. The time-to-live TTL field in the IP message header records the value of the time-to-live variable TTL, and the protocol number field records a value of 89, indicating that the encapsulated OSPF protocol message is. The source IP address field records the IP address of the host that sent this message, the destination IP address field records the given detection target address D; the IP message identification IP_ID fie
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