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Network system, learning bridge node and learning method

A node and network technology, applied in the field of network systems, can solve problems such as the decrease of frequency band utilization efficiency, the time-consuming setting operation, and the ineffectiveness of the learning process.

Inactive Publication Date: 2008-12-31
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when an asymmetric flow is flowing as shown in Document 3, which is related to the direction and the nodes the flow passes through are different, the learning process will not work. Although the frame reaches the recipient, it is also transmitted to the unnecessary recipients, so there is a problem of causing confusion in the network and reducing the efficiency of bandwidth utilization
[0013] Second, even in the prior art shown in Document 3, there is a problem that setting operations take a lot of effort.
[0014] In order to use the technology of Document 3, it is necessary to set the extension label (forwarding label) to be added on each node in advance according to the recipient MAC address (MAC DA), but because the number of MAC addresses depends on the network, it is thousands or tens of thousands. Such a number, so the setting operation takes a lot of effort

Method used

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  • Network system, learning bridge node and learning method
  • Network system, learning bridge node and learning method
  • Network system, learning bridge node and learning method

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Experimental program
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no. 2 Embodiment

[0552] Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

[0553] In the second embodiment of the present invention, instead of sending the learning frame in the first embodiment, an extension tag storing the address of the source node is added to the addressee unknown unicast frame, broadcast frame, or multicast frame, and the above-mentioned additional extension is received. Each node of the tag frame uses the extended tag to learn the association between the MAC address and the tag address, and that it does not transmit the learned frame to the remaining items that have not been erased by aging when the aging is completed. In this embodiment, since MAC→label learning is performed using a broadcast frame to which an extension label (hereinafter referred to as a source label) storing the address of the transmission source node is added, transmission of a learning frame can be omitted.

[0554] Figure 41 It is a bl...

no. 3 Embodiment

[0686] Next, a third embodiment of the present invention will be described in detail with reference to the drawings.

[0687] In the third embodiment of the present invention, in the case where the relationship between the client MAC address and the address of the node to which the client belongs has already been learned by setting the state of stopping the transmission of the learning frame in the second embodiment, the table searcher 203 determines It is different whether the hit bit is used to insert the recipient tag or to insert the source tag.

[0688] Figure 47 It is a block diagram showing in detail the configuration of the table search unit 203 described in FIG. 10 of the first embodiment.

[0689] of the second embodiment Figure 42 The table retriever 2031A described in , when a unicast frame arrives, retrieves the MAC forwarding table, has learned the association between the MAC address of the addressee client and the address of the node to which the client belo...

no. 4 Embodiment

[0756] Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings.

[0757] The fourth embodiment of the present invention differs from the configurations shown in the first to third embodiments in that an input port table memory for determining a destination tag from an input port and an input VLAN (VMAN) tag without learning is added. of.

[0758] Figure 49 It is a block diagram showing in detail the structure of the table search unit 203C in the fourth embodiment.

[0759] In the table searcher 203C in the fourth embodiment, compared with the table searcher 203 described in FIG. 10 in the first embodiment, the table manager 2031 is changed to a table manager 2031C, and the information comparator 2032 is changed to an information comparison The device 2032C is different.

[0760] The table manager 2031C searches the key information 20131 from the table, and issues a search instruction to any one of the label forwarding t...

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Abstract

The present invention relates to a network system, a learning bridge node, and a learning method. The network system of the present invention in a network connected with a plurality of nodes transmits a node of a learning frame, which comprises: a table high-speed buffer storage for storing address of a client attended to the node for sending requirement to an implement learning frame, an MAC transmitting table storage for storing an addressee label information corresponding to the addressee MAC address or an addressee port information corresponding to the addressee MAC address, a learning frame manager for determining a frame needed by a learning action according to the table high-speed buffer storage, and a table manager for determining transmission destination of the learning frame according to the MAC transmitting table storage. Wherein, the treatment needed of determining learning action by the learning frame manager and the treatment needed of determining transmission destination of a learning frame by the table manager, are processed independently.

Description

[0001] This application is a divisional application of [0002] Application number: 200480010503.1 [0003] Application date: January 9, 2004 [0004] Invention name: network system, learning bridge node, learning method and its program technical field [0005] The present invention relates to a network system, and particularly relates to a learning action that can be performed even for a bidirectional flow passing through an asymmetric path, and an additional forwarding label can be added when learning forwarding, a network system, a learning bridge constituting node, a learning bridge Formation method and its procedure. Background technique [0006] Hitherto, such learning bridges are used to decide forwarding paths in Ethernet(R) and the like. As prior art related to this learning bridge, there are the following technologies listed below. [0007] For example, in the standardized document issued by IEEE entitled "1998, IEEE Standard 802.1D (IEEE Std 802.1D)", it is st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L12/44
CPCH04L12/4625H04L12/4666H04L45/742H04L49/201H04L49/351H04L49/354H04L12/28
Inventor 榎本敦之飞鹰洋一厩桥正树岩田淳
Owner NEC CORP