CN1456004A - Method for layer 3 address self learning capable of programming in network exchanger - Google Patents
Method for layer 3 address self learning capable of programming in network exchanger Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/60—Software-defined switches
- H04L49/602—Multilayer or multiprotocol switching, e.g. IP switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/742—Route cache; Operation thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/59—Network arrangements, protocols or services for addressing or naming using proxies for addressing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
- H04L49/3009—Header conversion, routing tables or routing tags
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
- H04L49/352—Gigabit ethernet switching [GBPS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
Abstract
A packet identifier module is configured for determining whether a received data packet originated from a router. If the packet identifier module identifies the received data packet as being from a network node other than the router, the switch module selectively stores the layer 2 address and the associated layer 3 address of the data packet as an associated layer 2-layer 3 address pair in an address table. The selective storing of the associated layer 2-layer 3 address is also referred to as learning the internet protocol (IP)-media access control association (MAC) of the data packet. By selectively learning the IP-MAC associations of selected data packets from the non-router ports, the likelihood of overflowing the address table is reduced. Furthermore, by using the learned IP-MAC associations, the network switch may switch layer 3 data packets bypassing the router and reducing latency.
Description
Invention field
The present invention relates to the network address of learning data bag in the non-blocking network switch, this non-blocking network switch configuration is used in sub-network and router exchange data packets.
Background technology
Local area network (LAN) uses network cable or other medium to be linked at the platform on the network.Each LAN architecture is used media interviews control, and (media access control MAC), thereby makes that at each network node Network Interface Unit can the accesses network medium.
Make Ethernet protocol IEEE 802.3, stipulated to be used for the half-duplex medium access mechanism and the full-duplex media access mechanism of data packet transmission.The full-duplex media access mechanism for example between network node and switch hub, provides two-way, point-to-point communication link between two networking components.
Switched LAN is faced with more at a high speed connection, more flexible switching performance and adapts to the more requirement that increases day by day of the ability of complex network architecture.For example, transfer the same assignee's of the present invention United States Patent (USP) the 5th, announced a kind of network switch (networkswitch) for 953, No. 335, this network switch configuration is used for Ethernet (IEEE 802.3) packet of exchange second layer type between different network nodes; The packet that receives can comprise VLAN (virtual lan) marker frame according to the IEEE802.1q agreement, and IEEE 802.1q agreement has been stipulated the designated group of another sub-network (via router) or platform.Because exchange betides on the second layer level, usually must be by router transmits data packets between sub-network.
Usually need be thereby the switching performance of strengthening the network switch comprises the work of the 3rd layer (for example Internet protocol) processing to of the control of network address list do, so that carry out the study of layer 3 address based on CPU.For example, router can be carried out three layers of association of the second layer-Di based on the address resolution protocol of appointment.Usually, because the current second layer exchanges best configuration operation in clog-free state, wherein packet can be from the network switch to receive the phase same rate output of this packet, so router is a kind of path bottleneck for LAN.Therefore, the use with switch of three layers of exchange capacity of the second layer-Di can alleviate the burden of router and reduce the stand-by period.In addition, because in the network switch, the 3rd layer of study is the overlay address table apace, and traditional learning art of media interviews control (" MAC ") address of the packet of each reception of study is in the 3rd layer of exchange and impracticable in second layer exchange.
Summary of the invention
Need a kind of scheme, make the network switch can be provided for the automatic study of the network address of the second layer and the 3rd layer of exchange, link with 100 megabits (Mbps) and the kilomegabit (gigabit) of carrying out the free of data packet congestion.
Also need a kind of scheme, make the non-blocking network switch can be under line speed the optionally second layer address and the relevant layer 3 address of the packet that enters of study, and can overlay network switch address table.
The present invention can satisfy these needs and other needs, and the network switch that wherein is used for exchange data packets comprises a plurality of ports that are used to receive and send a plurality of packets.The packet that enters is assessed by the package identifier module, is received by the router that is connected to the network switch with the packet that judges whether to receive.If the packet that received is from network node but not this router, Switching Module promptly optionally stores the second layer source address and the 3rd layer of relevant source address of the packet that receives, as being associated in the address table the second layer-layer 3 address is right.Therefore, because address table comprises less project, the possibility of overflowing situation in this address table will reduce.
One object of the present invention is the method that is provided at network switch port exchange data packets.The port that this method comprises by the network switch receives packet, and judges whether that this port receives the packet from router.This method also comprises based on this port and receives from network node but not the judgement of the packet of this router, optionally will from the second layer source address of this packet and relevant the 3rd layer of source address as be associated the second layer-layer 3 address is right, be stored in the address table.Therefore, this address table contains less project, thereby has reduced the possibility of overflowing in the address table.
Another object of the present invention is for providing a kind of network switch, in order to the packet that receives in the exchange of network switch port.This network switch comprises a plurality of ports that are used to receive and send a plurality of packets, and a port in wherein a plurality of ports is connected to router, package identifier module and Switching Module.The packet that the configuration of package identifier module is used to judge whether to receive is from router.Switching Module is configured to based on the packet that receives from network node and non-router, optionally will from the second layer source address of the packet that receives and relevant the 3rd layer of source address as be associated the second layer-layer 3 address is right, be stored in the address table.The result reduces the possibility of overflowing in the address table.
Attendant advantages of the present invention and novel feature propose part in the following description, and part can become apparent after having examined following content or recognize by utilization the present invention to those skilled in the art.Advantage of the present invention especially can realize by scheme pointed in appended claims and combination thereof.
The accompanying drawing simple declaration
Referring to accompanying drawing, wherein have assembly identical assembly of expression in full specification of identical reference numerals, and wherein:
Fig. 1 is the block diagram that comprises the packet-switched network of a plurality of network switchs, and this network switch is used for according to embodiments of the invention exchange data packets between the sub-network of correspondence.
Fig. 2 is a block diagram, the network switch of key diagram 1 according to embodiments of the invention.
Fig. 3 is a flow chart, and the study in the network switch of Fig. 1 is described according to embodiments of the invention.
Fig. 4 is another flow chart, and the study in the network switch of Fig. 1 is described according to embodiments of the invention.
Fig. 5 is another flow chart, and the study in the network switch of Fig. 1 is described according to embodiments of the invention.
Best mode for carrying out the invention
Fig. 1 is the block diagram of explanation packet-switched network 10, and packet-switched network 10 for example is Ethernet (IEEEE a 802.3) network.This packet-switched formula network comprises integrated (for example single-chip) multi port switch 12 that packet is communicated by letter between network platform 14.Each network platform 14, for example client workstation all disposes according to IEEE 802.3 agreements usually, is used for sending and receive packet with 10 Mbps or 100Mbps.Each integrated multi port switch 12 interconnects through Gigabit Ethernet link 16, makes that packet can (or subnet subnet) transmits between 18a, 18b and the 18c in sub-network.Therefore, each sub-network comprises switch 12 and relevant network platform 14 groups.
Each switch 12 comprises switching port 20, is also referred to as package identifier module, and this switching port 20 comprises media interviews control (MAC) module 22 and port filter 24.MAC module 20 sends and receives packet by 10/100Mbps physical layer (PHY) transceiver (not shown) to relevant network platform 14 according to IEEE 802.3u agreement.Each switch 12 also comprises Switching Module 25, and Switching Module 25 is configured to the packet that is received is made frame forward direction decision (frame forwarding decision).Especially, according to source MAC, target MAC (Media Access Control) address and the vlan information in Ethernet (IEEE 802.3) title, Switching Module 25 configurations are used for second layer exchange decision; According to the assessment of the IP data division in the Ethernet package, this Switching Module 25 also disposes and is used for optionally the 3rd layer of exchange decision.
As shown in Figure 1, each switch 12 has relevant host CPU 26 and the buffer storage 28 of SSRAM for example.The overall operation of the switch 12 that host CPU 26 controls are corresponding comprises the programming of Switching Module 25.When Switching Module 25 was handled the forward direction decision of the packet that is used to receive, corresponding switch 12 used buffer storage 28 to come the storage data frame.
Each switch 12 also comprises memory 30, this memory configurations be used for packet Internet protocol (internet protocol, IP)-the related limited storage of media interviews control (MAC), and with it as address table.
As mentioned above, Switching Module 25 configurations are used to carry out second layer exchange decision and optionally the 3rd layer of exchange decision.If the end station 14 in sub-network 18a is wished send Email message to the selected network platform in sub-network 18b, the 18c, the availability of the 3rd layer of exchange decision may be effective especially.Because sub-network 18b, 18c are on the different sub-network, the main frame in the sub-network 18a can't be known the second layer address of the main frame on sub-network 18b and/or the 18c.The Switching Module 25 of switch 12a will send Email message be given router one 9, and this can cause extra delay.Switching Module 25 uses the 3rd layer of exchange decision, just makes the Switching Module 25 can to how to handle package (comprising further forward direction decision) and whether package should be considered as the high priority package in the purposes (such as video or audio frequency) to latency-sensitive and make intelligent decision.Because for LAN, router is the path bottleneck normally, and Switching Module 25 can alleviate the burden of router and improve the delay of round trip.
According to described embodiment, the network switch 12 is configured and the IP-MAC association of learning the selected data bag.The package identifier module 24 of each network switch is configured and the packet that judges whether to receive is received by router one 9.If package identifier module 24 confirms that the packet that receives is from network node but not this router one 9, the Switching Module 25 of the network switch 12 is the second layer source address of storage data bag and the 3rd layer of relevant source address optionally, as be associated in the address table the second layer-layer 3 address is right.The selectivity of the second layer-layer 3 address that is associated stores the study that also is called the IP-MAC association of packet.By optionally learning IP-MAC association, reduced the possibility that address table overflows from the selected data bag of non-router port.In addition, by using the IP-MAC association of being learnt, the network switch can be carried out the 3rd layer of exchange, thereby can walk around the router that links to each other between the sub-network, thereby reduces the stand-by period.
Fig. 2 shows the more detailed block diagram of port filter 24 shown in Figure 1.Port filter 24 comprises and receives first in first out (FIFO) buffer 51, MAC queueing logic 52, memory 53, MAC and go out team (dequeing) logic 54, send FIFO 55 and processor interface module 57.
Receiving FIFO 51 is buffer, and this buffer configuration is used for that the receiving unit from port 20 is received the packet that enters and is responded, and temporarily stores the packet that this enters.
When MAC queueing logic 52 was provided with the RNETS_ENABLE signal, Switching Module 25 promptly obtained notice: the packet of reception is the part of the internal subnet operational network traffic of being carried out between the sub-network that is connected directly to network switch 12a.
When MAC queueing logic 52 is provided with L3RC_LEARN, Switching Module 25 will be learnt the IP-MAC address correlation of the packet that is used to receive.
MAC goes out the processing that 54 pairs of Switching Modules 25 of group logic are carried out and is responded, and the packet that receives from SSRAM 28 retrievals is provided and sends this packet to suitable port.
Sending FIFO 55 provided before port 20 sends, and was used for the buffer of the packet that will send.
Receive the money Tu package that enters and in reception FIFO 51, make the money Tu package that enters obtain buffering at port 20.MAC queueing logic 52 is sent to external memory interface 56 with packet, is stored in the SSRAM 28 through data/address bus 59.
Title and the frame data and the packet that receive in search three layer information, for example IP packet of MAC queueing logic 52 by the check data bag.Utilize the 3rd layer of information, by purpose IP address in the IP title and the numerical value that is stored in the register of memory 53 are compared, MAC queueing logic 52 can judge whether that the packet that receives is the part of internal subnet operational network traffic.
Especially, if the packet that receives is to receive from router port, the IP destination address will be to the SUBNET_MASK mask (mask) of all the other ports.The SUBNET_ID register that subsequently result of mask operation is contrasted all the other ports compares.If the result of compare operation is successful, MAC queueing logic 52 promptly is provided with the RNETS_ENABLE signal to Switching Module 25.
Also configurable MAC queueing logic 52, so that judge when package is arrived by non-router port, sub-network is connected directly under the situation of network switch 12a, and whether for the IP address in the sub-network, Switching Module 25 needs the source IP-MAC address correlation of the packet of study reception.Host CPU 26 is responsible for making each register programming in memory 53, make Switching Module 25 know that what port is connected to router.
Also configurable MAC queueing logic 52 makes that judging when the MAC of port identifier module 24 queueing logic 52 that the packet that receives is predetermined issues this router and may be internal subnet operational network traffic a part of the time, learn the IP-MAC association.
In addition, the MAC queueing logic 52 of configurable package identifier module 24 makes and to issue this router and during for internal subnet operational network traffic a part of when the packet that receives is predetermined, learns the IP-MAC association of the package that received.
Especially, the MAC Address of the MAC destination address of the packet that relatively received of MAC queueing logic 52 and stored router in memory 53.If the result of compare operation is successful, the packet of this reception promptly is predetermined this router of issuing.Then, the MAC queueing logic of port identifier module 24 52 notice Switching Modules 25, optionally with second layer source address and relevant the 3rd layer of source address as be associated the second layer-layer 3 address is right, be stored in the address table 30.
Can be according to communication flows in the network switch 12 or user's preference, the MAC queueing logic 52 of configuration package identifier module 42 is to realize the arbitrary function in these functions.Also configurable MAC queueing logic 52, thus realize that the user thinks necessary various other functions.
Fig. 3 is the flow chart of the study carried out of the package identifier module 24 shown in the key diagram 2.In step 310, receive packet from a port 20 at port identifier module 24 places.
Configured port identifier module 24 makes it judge whether that in step 320 packet that receives is to receive from non-router port.Host CPU is responsible for which port programming is connected to router.
If in step 320, the packet that receives is just received by non-router port, then the MAC queueing logic 52 of port identifier module 24 is asserted (assert) learning signal,, in step 330, second layer address or MAC Address and related layer 3 address or IP address are stored in as the second layer-Di layer 3 address that is associated in the interior address table of memory 30 with notice Switching Module 25.
If in step 320, the packet of reception is just received by router port, and then the MAC queueing logic 52 of port identifier module 24 is not promptly asserted learning signal to Switching Module 25 in step 340.Thereby do not learn the IP-MAC association of the packet that received.
Fig. 4 is another flow chart of the study carried out of the package identifier module 24 shown in the key diagram 2.In this rule, when the packet that receives is from non-router port and has the target MAC (Media Access Control) address of this router, will learn the IP-MAC association.In step 410, receive packet through one of them port of port 20 and at port identifier module 24 places.
In step 420, if be successful relatively, then the packet of Jie Shouing is being router in step 430 at reception and target MAC (Media Access Control) address on the non-router port just.In step 430, the MAC queueing logic 52 notice Switching Modules 25 of port identifier module 24: second layer source address or mac source address and relevant the 3rd layer of source address or IP source address as the second layer-layer 3 address that is associated, are stored in the address table of memory 30.
If in step 420, one of them failure relatively or both all fail, and then in step 440, port identifier module 24 is obstructed bosom friend's die change piece 25.IP-MAC association with the packet not learning to receive.
Fig. 5 is another flow chart of the study carried out of explanation package identifier module 24 shown in Figure 4.In this rule, when the packet that receives is that a part and the target MAC (Media Access Control) address of internal subnet operational network traffic is router, then the IP-MAC association will be learnt.In step 510, receive packet from one of them of port 20 at port identifier module 24 places.
If by all of step 520 more all is successful, the MAC queueing logic 52 of port identifier module 24 is promptly notified Switching Module 25: in step 530, second layer source address or mac source address and relevant the 3rd layer of source address or IP source address as the second layer-layer 3 address that is associated, are stored in the address table in the memory 30.
If more all failed by all of step 520, in step 540, the MAC queueing logic 52 of port identifier module 24 will can not notified Switching Module 25.IP-MAC association with the packet that can not learn to receive.
According to described embodiment, the other device module of package be configured and the source data packet that is used to judge whether receive from router.If the packet that package identifier module identification is received is from network node and non-router, Switching Module is promptly optionally right as the second-Di layer 3 address that is associated with the relevant layer 3 address of second layer address and packet, is stored in the address table.By storing the IP-MAC association of selected data bag, when switch between commutation period during the reference address table, the network switch can reduce the search time in the address table.Therefore, the package identifier module makes the network switch that the 3rd layer of the link of 100Mbps or kilomegabit and second layer exchange capacity can be provided and does not have the obstruction of packet.
Though the present invention is described according to thinking the most feasible preferred embodiment at present, need be appreciated that the present invention is defined in described embodiment, otherwise, should think that the present invention contains various spirit that are contained in appended claims and change and the equivalent schemes in the scope.
Claims (14)
1. method that is used for the network switch, this method comprises:
A port by this network switch receives packet;
Judge whether that a described port receives the packet from router; And
Receive from network node but not the judgement of the packet of described router based on a described port, optionally will from the second layer address of this packet and relevant layer 3 address as be associated the second layer-layer 3 address is right, be stored in the address table.
2. method as claimed in claim 1, wherein:
Described optionally storing step comprises based on a described port and receives from network node but not the judgement of the packet of described router, and specify the judgement of described router according to being in purpose second layer address in this packet, will be from the second layer address of this packet and relevant layer 3 address as the second layer-layer 3 address that be associated to being stored.
3. method as claimed in claim 2, wherein:
Described second layer address and described relevant layer 3 address are source address.
4. method as claimed in claim 1, wherein:
The described network switch comprises second port and the 3rd port that is connected to first sub-network and second sub-network respectively.
5. method as claimed in claim 4 further comprises:
Judge whether that this packet comprises the address information of specifying the transmission of this packet between described second port and described the 3rd port.
6. method as claimed in claim 5, wherein:
Described optionally storing step comprises based on a described port and receives from network node but not the judgement of the packet of described router, and comprise the address information of specifying the transmission of this packet between this second port and the 3rd port according to this packet, with this second layer address and described relevant layer 3 address as the second layer-layer 3 address of described association to being stored.
7. method as claimed in claim 2 further comprises:
Judge that by the port identifier module in this network switch this packet comprises the address information of specifying the transmission of this packet between second port and the 3rd port, wherein this second port and the 3rd port are connected to first and second sub-network respectively.
8. network switch comprises:
A plurality of ports are used for receiving and transmitting a plurality of packets, and wherein one of them port of these a plurality of ports is connected to router;
The package identifier module, the packet that configuration is used to judge whether to receive is from router; And
Switching Module, be configured to based on the packet that receives from network node but not this router, optionally will from the second layer address of the packet of this reception and relevant layer 3 address as be associated the second layer-layer 3 address is right, be stored in the address table.
9. the network switch as claimed in claim 8, wherein:
This package identifier module configuration is used to judge whether that the packet of this reception comprises the address information of the destination address of specifying this router; And
This Switching Module is configured to based on the packet that receives from network node, and according to this address information of the destination address that comprises this router, optionally will be from the second layer address of the packet of this reception and relevant layer 3 address as the second layer-layer 3 address that is associated to being stored.
10. the network switch as claimed in claim 8, wherein:
This second layer address and this relevant layer 3 address are source address.
11. the network switch as claimed in claim 8, wherein:
Second port of described a plurality of ports is connected to first sub-network;
The 3rd port of described a plurality of ports is connected to second sub-network; And
This package identifier module configuration is used to judge whether that the packet of described reception comprises address information, and this address information is specified the transmission of packet between this first sub-network and this second sub-network of this reception.
12. as the network switch of claim 11, wherein:
This Switching Module based on the packet of this reception from network node, and this address information of between this first sub-network and second sub-network, transmitting according to the packet of specifying this reception, and this second layer address of the packet that optionally will receive and this layer 3 address of being correlated with as the described second layer-layer 3 address that is associated to being stored.
13. the network switch as claimed in claim 8 further comprises:
Second port of described a plurality of ports is connected to first sub-network;
The 3rd port of described a plurality of ports is connected to second sub-network; And
This package identifier module configuration is used to judge whether that the packet of described reception comprises address information, and this address information is specified the transmission of packet between this first sub-network and this second sub-network of this reception.
14. the network switch as claimed in claim 8, wherein:
Each port of described a plurality of ports is configured and comprises this package identifier module.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54861200A | 2000-04-13 | 2000-04-13 | |
| US09/548,612 | 2000-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1456004A true CN1456004A (en) | 2003-11-12 |
Family
ID=24189628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01807985A Pending CN1456004A (en) | 2000-04-13 | 2001-03-23 | Method for layer 3 address self learning capable of programming in network exchanger |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1273139A2 (en) |
| JP (1) | JP2004515088A (en) |
| KR (1) | KR20020091203A (en) |
| CN (1) | CN1456004A (en) |
| WO (1) | WO2001080493A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351995B (en) * | 2004-01-14 | 2011-02-02 | 利福斯通网络公司 | Managing processing utilization in a network node |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2858502B1 (en) * | 2003-08-01 | 2006-02-24 | Cit Alcatel | DEVICE AND METHOD FOR PROCESSING NETWORK TRAFFIC DATA FOR SELF CONFIGURATION OF A ROUTER |
| CN1304994C (en) * | 2003-08-27 | 2007-03-14 | 四川南山之桥微电子有限公司 | Exchanger and router chip drawn by running chip general stardards and core logic and method |
| JP4186971B2 (en) | 2005-09-01 | 2008-11-26 | 富士通株式会社 | Packet transfer device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6256314B1 (en) * | 1998-08-11 | 2001-07-03 | Avaya Technology Corp. | Apparatus and methods for routerless layer 3 forwarding in a network |
-
2001
- 2001-03-23 EP EP01922614A patent/EP1273139A2/en not_active Withdrawn
- 2001-03-23 WO PCT/US2001/009373 patent/WO2001080493A2/en not_active Application Discontinuation
- 2001-03-23 JP JP2001576622A patent/JP2004515088A/en not_active Withdrawn
- 2001-03-23 CN CN01807985A patent/CN1456004A/en active Pending
- 2001-03-23 KR KR1020027013752A patent/KR20020091203A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351995B (en) * | 2004-01-14 | 2011-02-02 | 利福斯通网络公司 | Managing processing utilization in a network node |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001080493A3 (en) | 2002-05-16 |
| EP1273139A2 (en) | 2003-01-08 |
| KR20020091203A (en) | 2002-12-05 |
| JP2004515088A (en) | 2004-05-20 |
| WO2001080493A2 (en) | 2001-10-25 |
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