Method for realizing particular virtual local area network and device

Abstract

The invention discloses a method for realizing a particular virtual local area network, which comprises the steps of: setting the port type of the particular virtual local area network (PVLAN) of each port in an inlet VALN table and an outlet VLAN table of the built virtual local area network (PVLAN); and comparing the PVLAN port type of the inlet in the inlet VALN table with the PVLAN port type of the outlet in the outlet VALN table when two-stage date enters into switch equipment to be transferred; and transmitting the date when the transmission requirement is met. The invention further discloses a device for realizing the particular virtual local area network. The technical scheme of the invention can conveniently realize the PVLAN function and easily be dilated, and can save the resource overhead of hardware caused by finding complex port segregation tables.

Description

Technical field [0001] The present invention relates to virtual local area network technology in data communication, in particular to a method and device for realizing a dedicated virtual local area network. Background technique [0002] Virtual Local Area Network (VLAN, Virtual Local Area Network) was originally a technology generated to restrict broadcast messages on a Layer 2 network. VLAN divides a flat Layer 2 network into multiple Layer 2 subnets, and the subnets cannot communicate with each other. Limiting broadcast messages to one subnet increases the management performance and security performance of the Layer 2 network. [0003] With the rapid development of network applications, Ethernet has experienced the development of 10 Mbit Ethernet, 100 Mbit Fast Ethernet, 1 Gigabit Ethernet, and 10 Gigabit Ethernet. In this process, users are concerned about network scalability. Put forward higher and higher requirements. Nowadays, traditional VLAN technology can no longer solv...

AI Technical Summary

Problems solved by technology

[0004] (1) Limitation of VLAN: The number of VLANs inherent in the switch is 4096, and this resource is limited;

[0005] (2) Spanning Tree Protocol (STP, Spanning Tree Protocol) management limitation: VLAN spanning tree topology management needs to run the STP algorithm according to the STP, and the STP algorithm is very complicated;

[0006] (3) Limitation of IP addresses: the number of IP addresses is limited, and the division of IP subnets, each IP subnet will occupy the corresponding IP address, so it will cause a waste of IP addresses;

[0007] (4) Routing restrictions: each subnet needs to be configured with a default gateway, which in turn requires maintenance and management of a large number of routes;

[0010] As the number of ports supported by the switch increases, and a port can belong to multiple VLANs, the port isolation table also becomes larger, which brings difficulties in storage, management, and maintenance. The support of PVLAN is limited, and usually only supports a certain number of PVLANs. Obviously, this cannot meet the growing network requirements; at the same time, in order to achieve performance requirements, switches usually use hardware forwarding, and check the port isolation table to determine whether the packet is forwarded. , which will also take up a certain amount of hardware resource overhead

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