Method and device for preventing flow from breaking

Abstract

The invention discloses a method for preventing a flow from breaking, comprising the following steps: when determining that a wireless terminal roams to the equipment, roamed wireless control equipment sends an MAC address of the wireless terminal to a two-layer exchange port on exchange equipment corresponding to the roamed wireless control equipment; the exchange equipment stores a correspondingrelationship of the two-layer exchange port corresponding to the roamed wireless control equipment and the MAC address of the wireless terminal; and the exchange equipment sends the flow to the wireless terminal through the two-layer exchange port according to the MAC address of the wireless terminal. In the invention, when a Station finishes roaming in AC, AC equipment replaces the Station to send MAC address information to the exchange equipment to enable the flow not to be broken.

Description

technical field [0001] The invention relates to the field of communication technologies, in particular to a method and device for preventing flow interruption. Background technique [0002] WLAN (Wireless Local Area Networks, wireless local area network) provides a wireless connection service of the local area network, which can provide high-speed wireless data access. Compared with the traditional wired access method, the wireless local area network makes the use of the network more free It eliminates the shackles of cables and port locations, and the wireless local area network has the advantages of being easy to carry and move, eliminating or reducing complicated network wiring, and only needing to place one or more AP (Access Point, access point) devices. Create a local area network that covers an entire building or region. Wherein, in a wireless local area network, an AC (Access Controller, wireless controller) is used to control and manage APs in the wireless local ar...

AI Technical Summary

Problems solved by technology

[0011] Step S305, for roaming to the Station under AC2, when the Layer 3 switching device needs to send traffic to the Station, it will forward it through Port1, but the Station cannot receive traffic from Port1, thus forming a short interruption of traffic

Among them, since the Station can only recognize that the AP has been switched (for example, switched to AP2), but cannot determine whether roaming within the AC or between ACs has occurred, the Station will not actively broadcast its own ARP information when there is no traffic to upload , that is, Port2 of the Layer 3 switching device cannot learn the ARP entry of the Station

At this time, the traffic forwarded by the layer-3 switching device to the Station, because there is no ARP entry of the Station on the Port2 port, and the ARP entry is on the Port1 port, the traffic will be forwarded through the Port1 port, and the Station cannot receive the traffic from the Port1 port. resulting in a brief interruption of traffic

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