Local network exchange method and local network exchanger

A switch and frame mapping technology, applied in data exchange network, data exchange through path configuration, network interconnection, etc., can solve the problem that users cannot fully enjoy the benefits of Ethernet, and achieve the effect of easy development and operation

Inactive Publication Date: 2004-02-25
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, users cannot fully enjoy the benefits originally provided by Ethernet

Method used

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  • Local network exchange method and local network exchanger
  • Local network exchange method and local network exchanger
  • Local network exchange method and local network exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment (1

[0148] Embodiment (1): VLAN mapping as required

[0149] Figure 7 The embodiment (1) of the LAN switch 100 according to the present invention is shown. The LAN switch 100 is equivalent to, for example, the edge switch 100_1, and the edge switch 100_1 receives data from figure 1 The frame 800 of the user terminal 300_1 in the network 500.

[0150] The LAN switch 100 is provided with: an input interface 11, a flow controller 12, a frame analyzer 13, an ID / header distribution unit 16, a switching fabric (switching fabric) 17, and an output interface 18, which are cascaded together to sequentially receive The arrived frame 800 is processed.

[0151] The LAN switch 100 is also provided with a VLAN group mapping section 14, a VLAN group table 50a, a VLAN mapping section 15, and a VLAN table 60a.

[0152] Figure 8 An example of the VLAN group table 50a for mapping VLAN groups using the port method is shown. In this table 50a, the input port 51, the VLAN group ID 52, and the validity...

Embodiment (2

[0179] Embodiment (2): VLAN mapping based on line failure

[0180] Picture 11 The embodiment (2) of the LAN switch 100 according to the present invention is shown. The LAN switch and Figure 7 The difference of the LAN switch 100 of the illustrated embodiment (1) is that a line failure detector 19 is further provided, and the VLAN table 60a is replaced with a VLAN table 60b.

[0181] The basic operation of the LAN switch 100 in the embodiment (2) is the same as that of the LAN switch 100 in the embodiment (1). Therefore, the following will mainly describe operations different from those of the embodiment (1).

[0182] It should be noted that the basic operations will also be briefly described in the following embodiments (3) to (10).

[0183] In the present embodiment (2), the line failure detector 19 detects the line failure, and the VLAN table 60b shows the VLAN using the line in which the failure has occurred, so that it may not be used.

[0184] Picture 12 One embodiment of...

Embodiment (3

[0204] Embodiment (3): Sequence switching of VLAN mapping

[0205] Figure 14 The embodiment (3) of the LAN switch 100 according to the present invention is shown. The LAN switch and Figure 7 The LAN switch 100 of the illustrated embodiment (1) is different in that the VLAN table 60a is replaced by the VLAN table 60c.

[0206] The LAN switch 100 of the embodiment (3) does not dynamically change / select VLANs as needed like the LAN switch of the embodiment (1), but sequentially selects VLANs.

[0207] Figure 15 One embodiment of the VLAN table 60c is shown. The VLAN table 60c and VLAN table 60a (see Picture 9 The difference of) is that the following items are added, that is, the subsequent activation 68 of the VLAN (VLANID 63) to be selected subsequently ("1": VLAN to be selected subsequently, "0": VLAN not to be selected). It should be noted that VLAN group table 50a and Figure 8 The VLAN group tables of the illustrated embodiment (1) are the same.

[0208] The operation proc...

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PUM

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Abstract

In a LAN switch capable of recognizing a VLAN, a plurality of paths are associated with a VLAN having a plurality of same members as components, and frames from the members are mapped to a predetermined path selected from among the paths. Also, a plurality of different VLAN's are associated with a single group composed of a plurality of members, and frames from the members are mapped to a predetermined VLAN selected from among the VLAN's. Furthermore, information of a frame is associated with the group to which a member having transmitted the frame belongs, and the received frame is mapped to the group to which the member having transmitted the frame belongs, based on the information of the frame.

Description

Technical field [0001] The present invention relates to a LAN (local area network) switch, in particular to a LAN switch capable of identifying a virtual LAN (hereinafter referred to as VLAN). Background technique [0002] Recently, with the development of communication technology, the speed of the LAN has been increased, thereby realizing a LAN with a speed on the order of Gbps. Furthermore, as a bridge for connecting to a LAN, a layer 2 LAN switch has become very important and has been widely used. For such high-speed LAN switches, the quality of service becomes more and more important. [0003] Figure 26 An example of an Ethernet 500 using a LAN switch defined by IEEE 802.3 is shown. [0004] The network 500 includes: a LAN switch 100a, which is connected to the user terminal 300a through a link 400a; a LAN switch 100c, which is connected to the user terminal 300b through a link 400e; and a LAN switch 100b. The switches 100a, 100b, and 100c are connected in this order throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L12/70
CPCH04L49/351H04L12/4691H04L49/354H04L12/4641H04L49/602
Inventor 织田壮太郎北田敦史
Owner FUJITSU LTD
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