Data exchange method based on virtual local area network
A technology of virtual local area network and data exchange, applied in the field of computer communication network, it can solve the problems such as the inability to bear the data frame, the limitation of applicability, and the limitation of the Ethernet business capacity, and achieve the effect of expanding the multi-service bearing capacity.
Inactive Publication Date: 2005-10-05
HUAWEI TECH CO LTD
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[0020] However, in the data exchange process of the above-mentioned disclosed data exchange method based on label technology, because the destination MAC address and the source MAC address carried by the data packet are respectively the physical address of the data packet sending device and the physical address of the data packet receiving device, while the network When forwarding data packets, the Layer 2 Ethernet switching device in , only forwards and modifies them according to the input interface number and VLAN ID of the data packets; therefore, the following defects will be caused:
[0021] A. This label switching technology is limited to only carrying Ethernet data frames, but cannot bear data frames of other standard networks, thus limiting the performance of Ethernet business capabilities
[0022] B. Since some existing networking technologies, such as ring Ethernet networking technology or media sharing technology, rely on link MAC addresses to transmit uplink and downlink data streams, this label switching technology is carried out with these networking technologies In the network system of networking, its applicability is greatly restricted
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[0051] The data exchange method based on VLAN of the present invention needs to configure the label forwarding table in the existing Ethernet switching equipment, and the Ethernet switching equipment here is specifically the switching equipment of the two-layer (data link layer), such as a two-layer switch, Bridge equipment, etc.; the configured label forwarding table can be set to the following two mapping methods depending on the specific VLAN operation:
[0052] The corresponding relationship between the incoming interface number of the data frame_the physical address information for the next hop device_the outgoing interface number; or
[0053] The corresponding relationship between the incoming interface number of the data frame and the VLAN tag of the data frame_the physical address information for the next-hop device_the outgoing interface number.
[0054] Wherein, the above-mentioned physical address information may be link physical address information, and may also be...
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The method includes steps: in Ethernet exchange equipment, assigning label-forwarding table, which can index information of physical address and output interface port number of device for next hop of data frame based on input interface port number of data frame, or input interface port number of data frame and VLAN label; based on indexed physical address and output interface port number of device for next hop of corresponding data frame, source physical address and target physical address of the data frame are packed again and output from the corresponding output interface port. The invention makes Ethernet exchange equipment possible to carry format of data frame in multiple types. Thus, Ethernet exchange equipment is suitable to network system configured in multiple modes.
Description
technical field [0001] The invention relates to the field of computer communication networks, in particular to a data exchange method based on a virtual local area network. Background technique [0002] Virtual local area network (VLAN, Virtual Local Area Network) is an emerging technology that realizes virtual workgroups by logically rather than physically dividing devices in a local area network (LAN, Local Area Network) into individual network segments. VLAN technology allows network managers to logically divide a physical LAN into different broadcast domains (that is, into different VLANs). Each VLAN contains a group of computer workstations with the same requirements, and has the same properties. However, since VLANs are obtained by logically rather than physically dividing LANs, computer workstations in the same VLAN do not need to be placed in the same physical space, that is, these computer workstations do not necessarily belong to the same physical LAN segment. Th...
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Login to View More IPC IPC(8): H04L12/28H04L45/50
Inventor 庆武廖月明
Owner HUAWEI TECH CO LTD