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Distributive multi-protocol label switching router and management of its labels

A multi-protocol and router technology, applied in data exchange through path configuration, data exchange network, instrument, etc.

Inactive Publication Date: 2005-07-27
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, there arises another problem of assigning unused labels

Method used

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  • Distributive multi-protocol label switching router and management of its labels
  • Distributive multi-protocol label switching router and management of its labels
  • Distributive multi-protocol label switching router and management of its labels

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Experimental program
Comparison scheme
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Embodiment Construction

[0035] figure 1 Indicates the format of an MPLS adjustment header.

[0036] Now refer to the attached figure 1 , the adjustment header of MPLS is composed of Ethernet header, adjustment header, and layer 3 header, wherein the adjustment header has 32 bits, and includes: label (20 bits), EXP (for testing, 3 bits), stack bits ( bottom of the stack, 1 bit), and TTL (time to live, 8 bits).

[0037] Each label includes 20 bits, and the theoretically usable range is between 0 (zero) and 1048575 (220-1). Thus, except for the range between 0 and 15 which has been reserved for special purposes, the remaining range is between 16 and 1048575, which is usually allocated by the label manager.

[0038] Thus, the label range of each line card = 1048575 / number of line cards.

[0039] For example, for 12 line cards, there are:

[0040] 1048575 / 12 = 87381

[0041] linecard 0 = {16, 87396}...

[0042] However, when the label range is allocated in this way, the label switching path determi...

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PUM

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Abstract

A distributed multi-protocol label switching router determines whether at least one extra label exists in a local label pool having information on allocated labels stored therein and requests allocation of the labels in preset units in a switching control card in response to a determination that no extra labels exists in response to a label allocation request to establish at least one label switched path in a subscriber line card. The labels are allocated at a label pool have information on all labels capable of being allocated in a distributed multi-protocol label switching router stored in preset units therein in response to the label allocation request of the subscriber line card in the switching control card, and the information of the allocated labels is transmitted to the subscriber line card. A label pool in the subscriber line card is updated according to information of the allocated labels transmitted from the switching control card, and the labels are allocated in the updated label pool in response to the label allocation request in the subscriber line card.

Description

technical field [0001] The present invention relates to Multiprotocol Label Switching (MPLS) systems, and more particularly, the present invention relates to distributed MPLS routers and management of labels therein. Background technique [0002] Currently, the number of Internet subscribers is increasing dramatically. In turn, subscribers demand a wide variety of services, from general data services based on best effort services currently characterization of the Internet, to multimedia services requiring voice, moving picture, etc. to guarantee "quality of service" on the Internet. As a technology suitable for transferring general-purpose data, the Internet is mainly based on Ethernet, such as "File Transfer Protocol (FTP)". [0003] "Multiprotocol Label Switching (MPLS)" has been developed to meet subscriber requirements, such as real-time data transmission within the Internet environment. Multiprotocol Label Switching is a protocol between layer 2 and layer 3 of the com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28G06F15/173H04L12/56H04L29/06
CPCH04L45/50H04L45/507E06B9/262E06B9/60E06B2009/2622E06B2009/785
Inventor 黄喆焄崔炳求朴容奭
Owner SAMSUNG ELECTRONICS CO LTD