Method, device and snooping equipment for reestablishing binding table entry

Abstract

The invention discloses a method, device and listening device for re-establishing a binding table entry. The method includes: when the listening device receives an NS message sent by a host, if the IPv6 address prefix carried in the NS message is not legal prefix and the receiving time is within the valid prefix collection period after the listening device restarts, the binding table entry to be confirmed is generated according to the NS message; if the listening device determines the pending confirmation based on the valid prefix collected during the valid prefix collection period If the IPv6 address prefix contained in the binding table entry is a legal prefix, a legal binding table entry is generated according to the binding table entry to be confirmed; if the binding table entry to be confirmed cannot be confirmed when the legal prefix collection period expires If the prefix of the IPv6 address contained in it is a valid prefix, the binding table entry to be confirmed is deleted. This method avoids the problem that the binding table entry cannot be regenerated through the binding table entry to be confirmed, and does not waste system resources, thereby improving the use performance and security performance of the device.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method, a device and a listening device for re-establishing a binding entry after a listening device is restarted. Background technique [0002] RFC4862 describes the process of stateless address autoconfiguration in IPv6 system in detail. For example, the simple structure of IPv6 system in a stateless address autoconfiguration environment is as follows: figure 1 As shown, it includes: a host (Host), a neighbor discovery protocol snooping (Neighbor Discovery Protocol Snooping, ND Snooping) device, and a router (Router). The system IPv6 stateless address automatic configuration process is as follows: [0003] The host sends a multicast routing request (Router Solicitation, RS) message in the local link, and the message can carry the destination address FF02::2, and all routers in the local link will receive the RS message. [0004] After receiving the multicast R...

AI Technical Summary

Problems solved by technology

[0020] Embodiments of the present invention provide a method, device, and listening device for re-establishing binding entries, so as to solve problems such as waste of system resources, reduction of device performance and security, etc., existing in the prior art when re-establishing binding entries

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