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Method for Ethernet switchboard data frame partitioning virtual local area network and transmitting

A virtual local area network and data frame technology, applied in the field of Ethernet communication, to achieve the effect of accurate VLAN, clear forwarding process, and small broadcast domain

Inactive Publication Date: 2008-01-23
ZTE CORP
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  • Abstract
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Problems solved by technology

[0012] Obviously, the existing data frame VLAN division and forwarding method is difficult to satisfy this demand very conveniently, because the division of the VLAN that data frame enters switch all is according to the port that data frame enters switch and data frame in this case. Determined by the VLAN value in the VLAN tag of the frame or whether it has a VLAN tag

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  • Method for Ethernet switchboard data frame partitioning virtual local area network and transmitting
  • Method for Ethernet switchboard data frame partitioning virtual local area network and transmitting

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Embodiment Construction

[0033] Below in conjunction with the accompanying drawings, a brief description will be given of the method of dividing VLANs on the Ethernet switch according to the VLAN tags carried by the ports and the data frames and the layer-2 forwarding process under this VLAN division method.

[0034] Fig. 1 is a schematic diagram of the Ethernet switch and ports mentioned in the present invention, which has three ports.

[0035] The division method of the QinQ VLAN table on the Ethernet switch is illustrated with an example:

[0036] Case 1, the data frame with only VLAN 10 tag entering from port 1 of the switch is still only tagged with VLAN 10 when it goes out from port 2;

[0037] Case 2: The data frame with only VLAN 100 tag entering port 1 is sent out from port 2 with QinQ double-layer tag, the inner tag is VLAN 100, and the outer tag is VLAN 20;

[0038] Situation 3: The data frame with QinQ double-tagged, inner VLAN 2000 and outer VLAN 1000 double-tagged data frame entering po...

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Abstract

The present invention relates to a method of an Ethernet switch data frame dividing and forwarding the VLAN. The present invention operates the VLAN division and realizes the forwarding according to a QinQ VLAN table established by a VLAN tag carried when the data frame enters into the switch and a port value when the data frame enters into the switch. By adopting the technical proposal of the present invention, when the switch operates the division of the data frame, the VLAN tag of the data frame entering into the switch PORT and the VLAN tag formerly carried by the data frame and the VLAN value in the VLAN tags are referenced at the same time, the division method of the data frame makes the VLAN value of the data frame more accurate, and more flexible, thereby, the broadcast domain is made smaller, the bandwidth wasted by the broadcast packet and the flood range of the broadcast packet are reduced, and the forwarding procedure is made more clear, the network is safer and the positioning of the fault is easy. More importantly, through the VLAN division method, the different services entering the switch can be distinguished with more details, and the different management and service grade division can be operated according to the different VLAN tags.

Description

technical field [0001] The invention relates to the Ethernet communication technology, in particular to a method for dividing data frames into different VLANs (Virtual Local Area Network, Virtual Local Area Network) on an Ethernet switch and forwarding them. Background technique [0002] With the rapid development of the Internet, the Ethernet network has gradually become an indispensable tool in people's daily work and life. As an essential device to form an Ethernet network, the number of Ethernet switching devices in the network is increasing day by day. With the increase of the number of Ethernet switching devices, the networking of the network is becoming more and more complex and the scale is getting larger and larger, which may cause the broadcast domain to become larger and larger, which is very easy to form a broadcast storm, and the use of VLAN is the most commonly used isolation method broadcast domain method. [0003] At the same time, at present, the Layer 2 s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L12/00H04L12/947
Inventor 杨自鹏
Owner ZTE CORP
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