Link discovery method and device
A link discovery and device technology, applied in the field of network management, can solve problems such as device information leakage, and achieve the effects of saving link overhead, reducing device information leakage, and reasonable LLDP packets
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Embodiment 1
[0084] The embodiment of the present invention provides a link discovery method, see Figure 5 , the method includes:
[0085] 101: When the LLDP packet sent by the directly connected device received by the network device is the first LLDP packet, determine the security level of the directly connected device according to the authentication TLV in the first LLDP packet, and the security level includes security and non-secure Security, the first LLDP message includes an authentication TLV and a minimum security level TLV, where the minimum security level TLV includes: Chassis ID TLV, Port ID TLV, Time to Live TLV and End of LLDPDU TLV.
[0086] 102: If the security level of the directly connected device is security, determine the device type of the directly connected device according to the first LLDP message, and send a second LLDP message to the directly connected device according to the device type of the directly connected device, and the second LLDP message is sent to the d...
Embodiment 2
[0089] In this embodiment of the present invention, the link discovery method provided by the present invention will be further described by taking the first network device and the second network device directly connected to the first network device as examples, see Figure 6 , the method includes:
[0090] 201: The first network device receives the LLDP packet from the second network device.
[0091] Wherein, the LLDP message includes several TLVs. As mentioned above, several TLVs include at least the lowest security level TLV, and the lowest security level TLV includes: Chassis ID TLV, Port ID TLV, Time to Live TLV and End of LLDPDU TLV.
[0092] 202: Determine whether the authentication TLV is carried in the LLDP packet. If the authentication TLV is carried in the LLDP packet, the LLDP packet is the first LLDP packet, and go to 203; if the LLDP packet does not carry the authentication TLV, go to 204.
[0093] 203: Determine the security level of the second network device ...
Embodiment 3
[0126] see Figure 7 , an embodiment of the present invention provides a link discovery device, which is suitable for the link discovery method provided in Embodiment 1, and the device includes:
[0127] The first determining module 301 is configured to determine the security level of the directly connected device according to the authentication TLV in the first LLDP message when the received LLDP packet sent by the directly connected device is the first LLDP packet, the security level Including security and non-security; the first LLDP message includes an authentication TLV and a minimum security level TLV, and the minimum security level TLV includes: Chassis ID TLV, Port ID TLV, Time to Live TLV and End of LLDPDU TLV;
[0128] The second determining module 302 is configured to determine the device type of the directly connected device according to the first LLDP message when the first determining module 301 determines that the security level of the directly connected device ...
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