WO1997043869A1 - Method and apparatus for per traffic flow buffer management - Google Patents
Method and apparatus for per traffic flow buffer management Download PDFInfo
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- WO1997043869A1 WO1997043869A1 PCT/US1997/007839 US9707839W WO9743869A1 WO 1997043869 A1 WO1997043869 A1 WO 1997043869A1 US 9707839 W US9707839 W US 9707839W WO 9743869 A1 WO9743869 A1 WO 9743869A1
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- buffer
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- cell
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0478—Provisions for broadband connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/20—Traffic policing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2441—Traffic characterised by specific attributes, e.g. priority or QoS relying on flow classification, e.g. using integrated services [IntServ]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/30—Flow control; Congestion control in combination with information about buffer occupancy at either end or at transit nodes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/32—Flow control; Congestion control by discarding or delaying data units, e.g. packets or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/10—Packet switching elements characterised by the switching fabric construction
- H04L49/104—Asynchronous transfer mode [ATM] switching fabrics
- H04L49/105—ATM switching elements
- H04L49/108—ATM switching elements using shared central buffer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5638—Services, e.g. multimedia, GOS, QOS
- H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
- H04L2012/5651—Priority, marking, classes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5678—Traffic aspects, e.g. arbitration, load balancing, smoothing, buffer management
- H04L2012/5681—Buffer or queue management
- H04L2012/5682—Threshold; Watermark
Definitions
- the present invention relates generally to the field of cell switching network communications and, more specifically, to the efficient management of shared buffer resources within such a network.
- ATM traffic is switched and multiplexed in fixed length cells and an ATM network typically provides a number of interconnected nodes which are capable of receiving data from other network nodes and forwarding that data through to other network nodes to its ultimate destination.
- Nodes are interconnected by transmission paths, each of which supports one or more virtual paths.
- Each virtual path contains one or more virtual channels. Switching can be performed at the transmission path, virtual path or virtual channel level.
- Network nodes generally employ buffering schemes to prevent contention for switch resources (e.g., ports). In the past, this has included relatively unsophisticated solutions, such as a first-in-first-out (FIFO) queue at each port. This solution quickly leads to cells being dropped indiscriminately when the volume of network traffic is large.
- Other schemes involve "per connection” buffering where each logical connection (i.e., virtual path, virtual channel) is allocated its own cell memory. When the number of supported connections is large, however, the sum of the maximum buffer requirements for individual connections may drastically exceed the physical available memory.
- This and other objects of the invention are achieved by an effective method for managing oversubscription by dynamically changing the maximum buffer space allowed for a particular traffic flow or connection in response to the global utilization of a single buffer resource.
- a buffer utilization threshold for each of a number of various traffic flows is established. As new cells arrive, the global usage of the buffer resource is monitored. As the buffer fills, the individual thresholds for the various traffic flows are dynamically scaled based upon the global usage of the buffer.
- This method allows guaranteed buffer space for sensitive traffic flows despite the oversubscription. Aggressive buffer allocations are scaled back when necessary, thereby leaving space for traffic flows which are using only a small portion of their allocated buffer space.
- the present invention in effect maintains isolation between well behaved traffic flows, insuring that only flows which are using a disproportionate amount of memory are blocked from storing further cells or packets in the memory when the global resource usage approaches capacity.
- the thresholds are coded in mantissa and exponent form so that the scaling is accomplished by adjusting the exponent. This approach allows a minimum of memory to be used to store the flow thresholds and simplifies the mechanism for scaling the thresholds.
- Figure la is a flow diagram illustrating the initialization of various parameters according to one embodiment
- Figure lb is a flow diagram illustrating dynamic per traffic flow buffer management according to one embodiment
- Figure lc is a flow diagram illustrating a cell service routine according to one embodiment
- Figure 2 is a plot which graphically illustrates the number of cells stored in a common buffer by each of a number of traffic flows;
- Figure 3 is a plot similar to the plot shown in Figure 2 that further shows a number of buffer thresholds corresponding to the various traffic flows sharing the common buffer;
- Figure 4 is a plot similar to the plot shown in Figure 3 and shows the common buffer utilization at a later time
- Figure 5 is a plot similar to the plot shown in Figure 4 and illustrates the effect of dynamic buffer threshold scaling for one traffic flow according to one embodiment
- Figure 6 is a plot similar to the plot shown in Figure 4 and illustrates the effects of dynamic buffer threshold scaling for a different traffic flow according to one embodiment
- An improved method and apparatus to efficiently manage a common communications buffer resource shared by a large number of traffic flows, such as a cell memory shared by ATM virtual channels or paths, is described.
- oversubscription of a shared buffer resource is managed by dynamically changing the maximum buffer space allowed for each traffic flow in response to the global utilization of a single shared buffer resource.
- each node is interconnected to other network nodes by a variety of transmission paths.
- the apparent capacity of these transmission paths is increased using virtual connections.
- each node connects a source-destination pair only when information, in the form of a cell, is present.
- Cells are packets of fixed length and comprise both flow control (i.e., cell header) and payload information.
- any or each of the nodes in a telecommunications network may comprise a cell memory or buffer which is available to a number of traffic flows.
- These buffers may exist at various levels, for example, at the port level, the card level (where a single card supports multiple ports), the switch level, the class of service level, etc.
- per flow is meant to include any or all situations where a single buffer resource is shared by a number of traffic flows, regardless of the level on which the sharing may occur.
- an initialization procedure begins at step 10.
- a shared buffer is initialized and a buffer count and flow cell counts are reset to zero. The use of these counts is described below.
- Figure lb illustrates the operation of dynamic threshold scaling for a preferred embodiment
- die corresponding traffic flow is determined from the cell header information at step 16.
- the default threshold and buffer count for that flow are then retrieved from memory at step 18.
- the default threshold can be thought of as representing the maximum amount of buffer resources that a flow may use if no other flows are currently using the buffer.
- the default threshold represents the maximum number of cells a given flow may store in the buffer under the "ideal" condition where no other traffic flows or resources are using the buffer.
- These thresholds may be determined based on factors such as total available buffer size, customer requirements, traffic type, etc.
- the flow cell count represents the number of cells corresponding to the particular traffic flow of interest which are already stored in the buffer.
- the total buffer utilization is determined. That is, the total number of cells from all traffic flows which are stored in the buffer is determined.
- a scaling factor for the flow threshold is retrieved from a lookup table stored in memory at step 22.
- Dynamic Threshj the dynamic threshold for the i ⁇ traffic flow
- Threshi the default threshold for the i ⁇ traffic flow
- SFj the scaling factor for the i ⁇ traffic flow according to the global buffer utilization.
- a comparison is made to determine if the number of cells corresponding to the traffic flow of interest already stored in the buffer exceeds the dynamic threshold for that flow. If so, the process moves to step 28 and the new cell is dropped. Otherwise, the process moves to step 30 where the new cell is admitted and the buffer count for the flow of interest and the global buffer count are incremented.
- FIG. 2 a graph depicting the common usage of a single buffer resource by a number of traffic flows is shown.
- the horizontal axis of the graph of Figure 2 shows the traffic flows which are sharing the buffer.
- Figure 2 shows only five flows sharing the single buffer, those skilled in the art will appreciate that this is for purposes of clarity and simplicity only and that the buffer management methods of the present invention are equally applicable to situations where any number of traffic flows share a single common buffer.
- the vertical axis of the graph shown in Figure 2 is a count of the number of cells stored in the buffer by each flow. For the example shown in Figure 1, traffic flow 1 has 500 cells stored, traffic flow 2 has 1250 cells stored, traffic flow 3 has 750 cells stored, traffic flow 4 has 650 cells stored and traffic flow 5 has 1000 cells stored. Thus, for the example shown in Figure 2, a total of 4150 cells are stored in the shared buffer.
- FIG. 3 further illustrates the example begun in Figure 2.
- Each flow has the same number of cells stored in the shared buffer as in Figure 2.
- a number of default thresholds are shown.
- Each default threshold corresponds to a respective one of the traffic flows 1 through 5.
- Threshi is set at 3000 cells
- Thresh 2 is set at 9000 cells
- Thresh 3 is set at 4000 cells
- Thresh is set at 5000 cells
- Threshs is set at 7000 cells.
- the default thresholds represent the maximum amount of buffer resources that each particular flow may use if no other connections are currently using the buffer.
- the thresholds have been determined based on factors such as total available buffer size, customer requirements, traffic type, etc.
- FIG 4 the graph of buffer utilization for the shared buffer is shown at a later point in time than was depicted in Figures 2 and 3.
- flows 2 and 4 have added a number of cells to the common buffer.
- Traffic flow 2 now has 5,500 cells stored in the buffer and traffic flow 4 has 1250 cells stored in the buffer.
- Flows 1, 3 and 5 have neither added nor removed cells from the buffer.
- a total of 9000 cells are stored in the buffer for the instant of time shown in Figure 4.
- the common buffer is capable of storing a maximum of 10,000 cells total, for the example depicted in Figure 4 the buffer is at 90% capacity.
- the new cell's corresponding traffic flow information is determined.
- the default threshold and buffer count for flow 2 are retrieved from memory.
- Thresh 2 is 9000 cells and the global buffer count is 9000 cells (i.e., 90% of capacity).
- the appropriate scaling factor for the flow 2 threshold is retrieved from a lookup table stored in memory. For this example, suppose the flow 2 threshold is to be scaled back to one-half of its default value when global buffer utilization reaches 90% of capacity (the very situation depicted in Figure 4).
- the default threshold (3000 cells) and current buffer count (500 cells) for flow 1 are retrieved from memory.
- the appropriate scaling factor for the flow 1 threshold is retrieved from the lookup table stored in memory. For this example, suppose that like flow 2, the flow 1 threshold is to be scaled back to one-half of its default value when global buffer utilization reaches 90% of capacity.
- flow 1 is only storing 500 cells in the common buffer. This is less than the number of cells permitted by the dynamically scaled threshold for this flow. As a result, the new cell is admitted to the buffer and the global buffer count and flow 1 buffer count are incremented.
- scaling Class 1 might be used for UBR traffic
- Class 2 might be for ABR traffic
- Classes 3 and 4 used for more sensitive traffic such as VBR and CBR.
- Table 1 shows some exemplary settings, although it will be appreciated mat other scaling factors could be used.
- the per flow thresholds for ABR and UBR traffic are likely to be set aggressively high as these classes can tolerate scaling back early.
- Other traffic types (such as CBR and VBR) would generally have smaller per flow thresholds but would be more sensitive to scaling back.
- the 1 % increments, the starting value of 90%, and the scaling fractions are all examples only.
- the contents of the table are, in general, configurable. For example, to provide a safety margin for CBR and VBR queues, it may be desirable to move the scale table lower, that is, replacing the 9X% with 8X% or 7X%. Also, the scaling factors can be made user selectable based on network conditions and/or requirements.
- the thresholds are preferably stored in a format having a 4-bit mantissa (M) and a common 4-bit exponent (E).
- M mantissa
- E 4-bit exponent
- the dynamic threshold scaling method has several performance advantages over existing techniques.
- the method is scalable to a large number of traffic flows and for a large number of per flow queues.
- Sensitive traffic flows can be isolated from “memory hogs”.
- the method further ensures "fair" allocation of resources between flows in the same scale and class. Note that "fair” does not necessarily mean equal (at 90% buffer utilization, flow 2 was permitted to store 4500 cells while flow 1 was only allowed 1500), rather, resource allocation may be determined by individual customer needs.
- Dynamic scaling further allows preferential treatments of groups of traffic flows via the selection of scaling classes. Global resource overflows are avoided and, hence, the performance degradation that accompanies these events is avoided.
- CLP cell loss priority
- each node in a network maintains information regarding each traffic flow (e.g., VP and/or VC) it supports. To implement per flow dynamic scaling management options, additional info ⁇ nation would be maintained by these nodes. Then, for each cell, the cell header is used to generate a flow indicator that indexes a lookup table that contains information regarding the traffic flow of interest.
- the lookup table may be stored in a memory associated with the network node of interest and would store a number of thresholds which could be dynamically scaled.
- CLP 1
- the CLP thresholds can be dynamically scaled according to the procedure described above.
- logic associated with the node containing the common buffer would keep track of end-of- frame (EOF) indicators in arriving cells. In this way, frames could be distinguished.
- EEF end-of- frame
- Various state information determined from die EOF indicators and a dynamically scaled early packet discard threahold could then be used to trigger frame discarding.
- Per flow buffer management can also be used to set the EFCI bit in cell headers to allow for the use of other congestion management processes.
- the EFCI threshold is checked as cells are serviced. If the buffer count for the traffic flow of interest is greater than the EFCI threshold for diat flow, the EFCI bit in die cell header set Again, the EFCI threshold can be dynamically scaled according to the above described process.
Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09540952A JP2000510308A (en) | 1996-05-15 | 1997-05-09 | Method and apparatus for buffer management per traffic flow |
EP97924631A EP0898855A1 (en) | 1996-05-15 | 1997-05-09 | Method and apparatus for per traffic flow buffer management |
AU30010/97A AU730804B2 (en) | 1996-05-15 | 1997-05-09 | Method and apparatus for per traffic flow buffer management |
CA002254104A CA2254104A1 (en) | 1996-05-15 | 1997-05-09 | Method and apparatus for per traffic flow buffer management |
Applications Claiming Priority (2)
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US08/648,556 US6034945A (en) | 1996-05-15 | 1996-05-15 | Method and apparatus for per traffic flow buffer management |
US08/648,556 | 1996-05-15 |
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WO1997043869A1 true WO1997043869A1 (en) | 1997-11-20 |
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PCT/US1997/007839 WO1997043869A1 (en) | 1996-05-15 | 1997-05-09 | Method and apparatus for per traffic flow buffer management |
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US (2) | US6034945A (en) |
EP (1) | EP0898855A1 (en) |
JP (1) | JP2000510308A (en) |
AU (1) | AU730804B2 (en) |
CA (1) | CA2254104A1 (en) |
WO (1) | WO1997043869A1 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2321820A (en) * | 1997-01-17 | 1998-08-05 | Tadhg Creedon | A method for dynamically allocating buffers to virtual channels in an asynchronous network |
EP0920235A2 (en) * | 1997-11-28 | 1999-06-02 | Newbridge Networks Corporation | Congestion management in a multi-port shared memory switch |
FR2775546A1 (en) * | 1998-01-19 | 1999-09-03 | Nec Corp | Asynchronous transfer mode switch for traffic control |
US5987507A (en) * | 1998-05-28 | 1999-11-16 | 3Com Technologies | Multi-port communication network device including common buffer memory with threshold control of port packet counters |
US6151323A (en) * | 1997-01-17 | 2000-11-21 | 3Com Technologies | Method of supporting unknown addresses in an interface for data transmission in an asynchronous transfer mode |
EP1056245A2 (en) * | 1999-05-27 | 2000-11-29 | Newbridge Networks Corporation | Buffering system employing per traffic flow accounting congestion control |
WO2000074432A1 (en) * | 1999-05-28 | 2000-12-07 | Network Equipment Technologies, Inc. | Fair discard system |
US6163541A (en) * | 1997-01-17 | 2000-12-19 | 3Com Technologies | Method for selecting virtual channels based on address priority in an asynchronous transfer mode device |
US6208662B1 (en) | 1997-01-17 | 2001-03-27 | 3Com Technologies | Method for distributing and recovering buffer memories in an asynchronous transfer mode edge device |
US6549541B1 (en) | 1997-11-04 | 2003-04-15 | Nokia Corporation | Buffer management |
US7139271B1 (en) | 2001-02-07 | 2006-11-21 | Cortina Systems, Inc. | Using an embedded indication of egress application type to determine which type of egress processing to perform |
US7286566B1 (en) | 2001-05-08 | 2007-10-23 | Cortina Systems, Inc. | Multi-service segmentation and reassembly device that maintains reduced number of segmentation contexts |
US9008109B2 (en) | 2011-10-26 | 2015-04-14 | Fujitsu Limited | Buffer management of relay device |
Families Citing this family (89)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6034945A (en) | 1996-05-15 | 2000-03-07 | Cisco Technology, Inc. | Method and apparatus for per traffic flow buffer management |
US5991265A (en) * | 1996-12-02 | 1999-11-23 | Conexant Systems, Inc. | Asynchronous transfer mode system and method |
US6246687B1 (en) * | 1997-03-27 | 2001-06-12 | Massachusetts Institute Of Technology | Network switching system supporting guaranteed data rates |
US6430191B1 (en) | 1997-06-30 | 2002-08-06 | Cisco Technology, Inc. | Multi-stage queuing discipline |
US6487202B1 (en) | 1997-06-30 | 2002-11-26 | Cisco Technology, Inc. | Method and apparatus for maximizing memory throughput |
US6912224B1 (en) | 1997-11-02 | 2005-06-28 | International Business Machines Corporation | Adaptive playout buffer and method for improved data communication |
US6560198B1 (en) * | 1997-11-07 | 2003-05-06 | Telcordia Technologies, Inc. | Method and system for stabilized random early detection using packet sampling |
IL122271A (en) * | 1997-11-21 | 2001-01-11 | Eci Telecom Ltd | Apparatus and method for managing network congestion |
US6526060B1 (en) | 1997-12-05 | 2003-02-25 | Cisco Technology, Inc. | Dynamic rate-based, weighted fair scheduler with explicit rate feedback option |
US6434612B1 (en) | 1997-12-10 | 2002-08-13 | Cisco Technology, Inc. | Connection control interface for asynchronous transfer mode switches |
US6320845B1 (en) | 1998-04-27 | 2001-11-20 | Cisco Technology, Inc. | Traffic management and flow prioritization on a routed computer network |
US6377546B1 (en) * | 1998-05-12 | 2002-04-23 | International Business Machines Corporation | Rate guarantees through buffer management |
DE59914435D1 (en) * | 1998-05-29 | 2007-09-13 | Siemens Ag | Method for removing ATM cells from an ATM communication device |
US6438102B1 (en) | 1998-06-03 | 2002-08-20 | Cisco Technology, Inc. | Method and apparatus for providing asynchronous memory functions for bi-directional traffic in a switch platform |
US6483850B1 (en) * | 1998-06-03 | 2002-11-19 | Cisco Technology, Inc. | Method and apparatus for routing cells having different formats among service modules of a switch platform |
US6463485B1 (en) | 1998-06-03 | 2002-10-08 | Cisco Technology, Inc. | System for providing cell bus management in a switch platform including a write port cell count in each of a plurality of unidirectional FIFO for indicating which FIFO be able to accept more cell |
JP3141850B2 (en) * | 1998-07-10 | 2001-03-07 | 日本電気株式会社 | Time division switching device, time division switching method, and recording medium |
US6430153B1 (en) | 1998-09-04 | 2002-08-06 | Cisco Technology, Inc. | Trunk delay simulator |
US6999421B1 (en) * | 1998-10-26 | 2006-02-14 | Fujitsu Limited | Adjustable connection admission control method and device for packet-based switch |
JP3070683B2 (en) * | 1998-11-13 | 2000-07-31 | 日本電気株式会社 | Image transmission method and image transmission device using the method |
US6978312B2 (en) * | 1998-12-18 | 2005-12-20 | Microsoft Corporation | Adaptive flow control protocol |
US6658469B1 (en) * | 1998-12-18 | 2003-12-02 | Microsoft Corporation | Method and system for switching between network transport providers |
US6724756B2 (en) | 1999-01-12 | 2004-04-20 | Cisco Technology, Inc. | Method for introducing switched virtual connection call redundancy in asynchronous transfer mode networks |
US7215641B1 (en) * | 1999-01-27 | 2007-05-08 | Cisco Technology, Inc. | Per-flow dynamic buffer management |
US6762994B1 (en) * | 1999-04-13 | 2004-07-13 | Alcatel Canada Inc. | High speed traffic management control using lookup tables |
EP1069801B1 (en) * | 1999-07-13 | 2004-10-06 | International Business Machines Corporation | Connections bandwidth right sizing based on network resources occupancy monitoring |
US6618378B1 (en) * | 1999-07-21 | 2003-09-09 | Alcatel Canada Inc. | Method and apparatus for supporting multiple class of service connections in a communications network |
US6724776B1 (en) * | 1999-11-23 | 2004-04-20 | International Business Machines Corporation | Method and system for providing optimal discard fraction |
US6788697B1 (en) * | 1999-12-06 | 2004-09-07 | Nortel Networks Limited | Buffer management scheme employing dynamic thresholds |
US6891794B1 (en) | 1999-12-23 | 2005-05-10 | Cisco Technology, Inc. | System and method for bandwidth protection in a packet network |
US6775292B1 (en) * | 2000-01-24 | 2004-08-10 | Cisco Technology, Inc. | Method for servicing of multiple queues carrying voice over virtual circuits based on history |
US7142558B1 (en) | 2000-04-17 | 2006-11-28 | Cisco Technology, Inc. | Dynamic queuing control for variable throughput communication channels |
US6904014B1 (en) | 2000-04-27 | 2005-06-07 | Cisco Technology, Inc. | Method and apparatus for performing high-speed traffic shaping |
US6738386B1 (en) * | 2000-05-11 | 2004-05-18 | Agere Systems Inc. | Controlled latency with dynamically limited queue depth based on history and latency estimation |
US20020018474A1 (en) * | 2000-06-01 | 2002-02-14 | Seabridge Ltd. | Efficient packet transmission over ATM |
US7126969B1 (en) * | 2000-07-06 | 2006-10-24 | Cisco Technology, Inc. | Scalable system and method for reliably sequencing changes in signaling bits in multichannel telecommunication lines transmitted over a network |
US7124440B2 (en) * | 2000-09-07 | 2006-10-17 | Mazu Networks, Inc. | Monitoring network traffic denial of service attacks |
US7043759B2 (en) * | 2000-09-07 | 2006-05-09 | Mazu Networks, Inc. | Architecture to thwart denial of service attacks |
US7702806B2 (en) * | 2000-09-07 | 2010-04-20 | Riverbed Technology, Inc. | Statistics collection for network traffic |
US7743134B2 (en) * | 2000-09-07 | 2010-06-22 | Riverbed Technology, Inc. | Thwarting source address spoofing-based denial of service attacks |
US7278159B2 (en) * | 2000-09-07 | 2007-10-02 | Mazu Networks, Inc. | Coordinated thwarting of denial of service attacks |
US7398317B2 (en) * | 2000-09-07 | 2008-07-08 | Mazu Networks, Inc. | Thwarting connection-based denial of service attacks |
US20020107974A1 (en) * | 2000-10-06 | 2002-08-08 | Janoska Mark William | Data traffic manager |
US6967921B1 (en) * | 2000-11-27 | 2005-11-22 | At&T Corp. | Method and device for efficient bandwidth management |
US7130267B1 (en) | 2000-12-29 | 2006-10-31 | Cisco Technology, Inc. | System and method for allocating bandwidth in a network node |
US6947996B2 (en) * | 2001-01-29 | 2005-09-20 | Seabridge, Ltd. | Method and system for traffic control |
US6990115B2 (en) * | 2001-02-26 | 2006-01-24 | Seabridge Ltd. | Queue control method and system |
US6831891B2 (en) * | 2001-03-06 | 2004-12-14 | Pluris, Inc. | System for fabric packet control |
US6950396B2 (en) * | 2001-03-20 | 2005-09-27 | Seabridge Ltd. | Traffic control method and system |
JP3598985B2 (en) * | 2001-03-21 | 2004-12-08 | 日本電気株式会社 | Queue assignment system and queue assignment method for packet switch |
US7450510B1 (en) | 2001-04-19 | 2008-11-11 | Cisco Technology, Inc. | System and method for distributing guaranteed bandwidth among service groups in a network node |
US7161905B1 (en) * | 2001-05-03 | 2007-01-09 | Cisco Technology, Inc. | Method and system for managing time-sensitive packetized data streams at a receiver |
GB2372172B (en) | 2001-05-31 | 2002-12-24 | Ericsson Telefon Ab L M | Congestion handling in a packet data network |
US7065581B2 (en) * | 2001-06-27 | 2006-06-20 | International Business Machines Corporation | Method and apparatus for an improved bulk read socket call |
US7225271B1 (en) | 2001-06-29 | 2007-05-29 | Cisco Technology, Inc. | System and method for recognizing application-specific flows and assigning them to queues |
US7218608B1 (en) | 2001-08-02 | 2007-05-15 | Cisco Technology, Inc. | Random early detection algorithm using an indicator bit to detect congestion in a computer network |
US7039013B2 (en) * | 2001-12-31 | 2006-05-02 | Nokia Corporation | Packet flow control method and device |
US7213264B2 (en) | 2002-01-31 | 2007-05-01 | Mazu Networks, Inc. | Architecture to thwart denial of service attacks |
US7743415B2 (en) * | 2002-01-31 | 2010-06-22 | Riverbed Technology, Inc. | Denial of service attacks characterization |
US7286547B2 (en) * | 2002-05-09 | 2007-10-23 | Broadcom Corporation | Dynamic adjust multicast drop threshold to provide fair handling between multicast and unicast frames |
US8504879B2 (en) * | 2002-11-04 | 2013-08-06 | Riverbed Technology, Inc. | Connection based anomaly detection |
US8479057B2 (en) * | 2002-11-04 | 2013-07-02 | Riverbed Technology, Inc. | Aggregator for connection based anomaly detection |
US7363656B2 (en) * | 2002-11-04 | 2008-04-22 | Mazu Networks, Inc. | Event detection/anomaly correlation heuristics |
US7421502B2 (en) * | 2002-12-06 | 2008-09-02 | International Business Machines Corporation | Method and system for storage-aware flow resource management |
US7929534B2 (en) * | 2004-06-28 | 2011-04-19 | Riverbed Technology, Inc. | Flow logging for connection-based anomaly detection |
US7760653B2 (en) * | 2004-10-26 | 2010-07-20 | Riverbed Technology, Inc. | Stackable aggregation for connection based anomaly detection |
US8909807B2 (en) * | 2005-04-07 | 2014-12-09 | Opanga Networks, Inc. | System and method for progressive download using surplus network capacity |
US20070058650A1 (en) * | 2005-08-09 | 2007-03-15 | International Business Machines Corporation | Resource buffer sizing under replenishment for services |
JP2007206799A (en) * | 2006-01-31 | 2007-08-16 | Toshiba Corp | Data transfer device, information recording reproduction device and data transfer method |
US20070198982A1 (en) * | 2006-02-21 | 2007-08-23 | International Business Machines Corporation | Dynamic resource allocation for disparate application performance requirements |
US7948976B2 (en) * | 2006-04-26 | 2011-05-24 | Marvell Israel (M.I.S.L) Ltd. | Efficient management of queueing resources for switches |
JP4129694B2 (en) * | 2006-07-19 | 2008-08-06 | ソニー株式会社 | Information processing apparatus and method, program, and recording medium |
US20080049760A1 (en) * | 2006-08-24 | 2008-02-28 | Gilles Bergeron | Oversubscription in broadband network |
TW200833026A (en) * | 2007-01-29 | 2008-08-01 | Via Tech Inc | Packet processing method and a network device using the method |
US7978607B1 (en) * | 2008-08-29 | 2011-07-12 | Brocade Communications Systems, Inc. | Source-based congestion detection and control |
EP2187580B1 (en) * | 2008-11-18 | 2013-01-16 | Alcatel Lucent | Method for scheduling packets of a plurality of flows and system for carrying out the method |
US9112818B1 (en) | 2010-02-05 | 2015-08-18 | Marvell Isreal (M.I.S.L) Ltd. | Enhanced tail dropping in a switch |
US8499106B2 (en) * | 2010-06-24 | 2013-07-30 | Arm Limited | Buffering of a data stream |
US8665725B2 (en) * | 2011-12-20 | 2014-03-04 | Broadcom Corporation | System and method for hierarchical adaptive dynamic egress port and queue buffer management |
US9485326B1 (en) | 2013-04-01 | 2016-11-01 | Marvell Israel (M.I.S.L) Ltd. | Scalable multi-client scheduling |
US9306876B1 (en) | 2013-04-01 | 2016-04-05 | Marvell Israel (M.I.S.L) Ltd. | Multibank egress queuing system in a network device |
US9473418B2 (en) * | 2013-12-12 | 2016-10-18 | International Business Machines Corporation | Resource over-subscription |
US9548937B2 (en) * | 2013-12-23 | 2017-01-17 | Intel Corporation | Backpressure techniques for multi-stream CAS |
US10057194B1 (en) | 2014-01-07 | 2018-08-21 | Marvell Israel (M.I.S.L) Ltd. | Methods and apparatus for memory resource management in a network device |
US9866489B2 (en) * | 2014-07-11 | 2018-01-09 | F5 Networks, Inc. | Delayed proxy action |
CN109257304A (en) * | 2017-07-12 | 2019-01-22 | 中兴通讯股份有限公司 | A kind of bandwidth adjusting method, device, storage medium and the network equipment |
US10608943B2 (en) * | 2017-10-27 | 2020-03-31 | Advanced Micro Devices, Inc. | Dynamic buffer management in multi-client token flow control routers |
CN109408233B (en) * | 2018-10-17 | 2022-06-03 | 郑州云海信息技术有限公司 | Cache resource allocation method and device |
US11206222B2 (en) | 2020-02-07 | 2021-12-21 | Wipro Limited | System and method of memory management in communication networks |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5434848A (en) * | 1994-07-28 | 1995-07-18 | International Business Machines Corporation | Traffic management in packet communications networks |
EP0706298A2 (en) * | 1994-10-04 | 1996-04-10 | AT&T Corp. | Dynamic queue length thresholds in a shared memory ATM switch |
Family Cites Families (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4430712A (en) * | 1981-11-27 | 1984-02-07 | Storage Technology Corporation | Adaptive domain partitioning of cache memory space |
US4734907A (en) * | 1985-09-06 | 1988-03-29 | Washington University | Broadcast packet switching network |
CA1329432C (en) * | 1988-11-02 | 1994-05-10 | William Davy | Method of memory and cpu time allocation for a multi-user computer system |
US5014265A (en) * | 1989-11-30 | 1991-05-07 | At&T Bell Laboratories | Method and apparatus for congestion control in a data network |
US5157654A (en) | 1990-12-18 | 1992-10-20 | Bell Communications Research, Inc. | Technique for resolving output port contention in a high speed packet switch |
US5303078A (en) | 1990-12-18 | 1994-04-12 | Bell Communications Research, Inc. | Apparatus and method for large scale ATM switching |
US5274768A (en) | 1991-05-28 | 1993-12-28 | The Trustees Of The University Of Pennsylvania | High-performance host interface for ATM networks |
CA2089726C (en) | 1991-06-18 | 1999-10-26 | Takao Ogura | Detour path determination method |
US5379297A (en) | 1992-04-09 | 1995-01-03 | Network Equipment Technologies, Inc. | Concurrent multi-channel segmentation and reassembly processors for asynchronous transfer mode |
DE69129851T2 (en) | 1991-09-13 | 1999-03-25 | Ibm | Configurable gigabit / s switch adapter |
US5542068A (en) * | 1991-12-10 | 1996-07-30 | Microsoft Corporation | Method and system for storing floating point numbers to reduce storage space |
US5680582A (en) * | 1991-12-20 | 1997-10-21 | Microsoft Corporation | Method for heap coalescing where blocks do not cross page of segment boundaries |
SE515178C2 (en) * | 1992-03-20 | 2001-06-25 | Ericsson Telefon Ab L M | Procedures and devices for prioritizing buffer management in packet networks |
US5313454A (en) | 1992-04-01 | 1994-05-17 | Stratacom, Inc. | Congestion control for cell networks |
US5539899A (en) * | 1992-04-03 | 1996-07-23 | International Business Machines Corporation | System and method for handling a segmented program in a memory for a multitasking data processing system utilizing paged virtual storage |
FR2694671A1 (en) * | 1992-08-06 | 1994-02-11 | Trt Telecom Radio Electr | Device for rearranging virtual circuit rates in asynchronous time division multiplex transmission. |
FR2699703B1 (en) * | 1992-12-22 | 1995-01-13 | Bull Sa | Method for managing a buffer memory, recording medium and computer system incorporating it. |
US5412655A (en) | 1993-01-29 | 1995-05-02 | Nec Corporation | Multiprocessing system for assembly/disassembly of asynchronous transfer mode cells |
US5359592A (en) | 1993-06-25 | 1994-10-25 | Stratacom, Inc. | Bandwidth and congestion control for queue channels in a cell switching communication controller |
DE4323405A1 (en) * | 1993-07-13 | 1995-01-19 | Sel Alcatel Ag | Access control method for a buffer memory and device for buffering data packets and switching center with such a device |
JP3044983B2 (en) | 1993-08-25 | 2000-05-22 | 株式会社日立製作所 | Cell switching method for ATM switching system |
CA2123447C (en) | 1993-09-20 | 1999-02-16 | Richard L. Arndt | Scalable system interrupt structure for a multiprocessing system |
KR960003783B1 (en) * | 1993-11-06 | 1996-03-22 | 한국전기통신공사 | Subscriber atm mux for interface to isdn |
US5600820A (en) * | 1993-12-01 | 1997-02-04 | Bell Communications Research, Inc. | Method for partitioning memory in a high speed network based on the type of service |
JP2888376B2 (en) | 1993-12-31 | 1999-05-10 | インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン | Switching equipment for multiple traffic classes |
JPH07221761A (en) | 1994-02-04 | 1995-08-18 | Fujitsu Ltd | Cell delay absorption circuit |
JP3405800B2 (en) | 1994-03-16 | 2003-05-12 | 富士通株式会社 | ATM-based variable-length cell transfer system, ATM-based variable-length cell switch, and ATM-based variable-length cell switch |
US5583861A (en) | 1994-04-28 | 1996-12-10 | Integrated Telecom Technology | ATM switching element and method having independently accessible cell memories |
JP2655481B2 (en) | 1994-04-28 | 1997-09-17 | 日本電気株式会社 | Priority control method in output buffer type ATM switch |
US5949781A (en) | 1994-08-31 | 1999-09-07 | Brooktree Corporation | Controller for ATM segmentation and reassembly |
US5548587A (en) | 1994-09-12 | 1996-08-20 | Efficient Networks, Inc. | Asynchronous transfer mode adapter for desktop applications |
EP0705006B1 (en) | 1994-09-28 | 1999-09-01 | Siemens Aktiengesellschaft | ATM communication system for statistical multiplexing of cells |
US5541919A (en) * | 1994-12-19 | 1996-07-30 | Motorola, Inc. | Multimedia multiplexing device and method using dynamic packet segmentation |
ZA959722B (en) | 1994-12-19 | 1996-05-31 | Alcatel Nv | Traffic management and congestion control for packet-based networks |
EP0719065A1 (en) | 1994-12-20 | 1996-06-26 | International Business Machines Corporation | Multipurpose packet switching node for a data communication network |
JPH08288965A (en) | 1995-04-18 | 1996-11-01 | Hitachi Ltd | Switching system |
US5625625A (en) | 1995-07-07 | 1997-04-29 | Sun Microsystems, Inc. | Method and apparatus for partitioning data load and unload functions within an interface system for use with an asynchronous transfer mode system |
US5917805A (en) | 1995-07-19 | 1999-06-29 | Fujitsu Network Communications, Inc. | Network switch utilizing centralized and partitioned memory for connection topology information storage |
US5796735A (en) | 1995-08-28 | 1998-08-18 | Integrated Device Technology, Inc. | System and method for transmission rate control in a segmentation and reassembly (SAR) circuit under ATM protocol |
US5875352A (en) | 1995-11-03 | 1999-02-23 | Sun Microsystems, Inc. | Method and apparatus for multiple channel direct memory access control |
US5974466A (en) | 1995-12-28 | 1999-10-26 | Hitachi, Ltd. | ATM controller and ATM communication control device |
US5765032A (en) | 1996-01-11 | 1998-06-09 | Cisco Technology, Inc. | Per channel frame queuing and servicing in the egress direction of a communications network |
US6028844A (en) | 1996-01-25 | 2000-02-22 | Cypress Semiconductor Corp. | ATM receiver |
US5978856A (en) | 1996-01-26 | 1999-11-02 | Dell Usa, L.P. | System and method for reducing latency in layered device driver architectures |
US5793747A (en) | 1996-03-14 | 1998-08-11 | Motorola, Inc. | Event-driven cell scheduler and method for supporting multiple service categories in a communication network |
US5844901A (en) | 1996-03-15 | 1998-12-01 | Integrated Telecom Technology | Asynchronous bit-table calendar for ATM switch |
US5812527A (en) | 1996-04-01 | 1998-09-22 | Motorola Inc. | Simplified calculation of cell transmission rates in a cell based netwook |
US6034945A (en) | 1996-05-15 | 2000-03-07 | Cisco Technology, Inc. | Method and apparatus for per traffic flow buffer management |
US6058114A (en) | 1996-05-20 | 2000-05-02 | Cisco Systems, Inc. | Unified network cell scheduler and flow controller |
US5898688A (en) | 1996-05-24 | 1999-04-27 | Cisco Technology, Inc. | ATM switch with integrated system bus |
US5742765A (en) | 1996-06-19 | 1998-04-21 | Pmc-Sierra, Inc. | Combination local ATM segmentation and reassembly and physical layer device |
GB9613473D0 (en) | 1996-06-27 | 1996-08-28 | Mitel Corp | ATM cell transmit priority allocator |
US5854911A (en) | 1996-07-01 | 1998-12-29 | Sun Microsystems, Inc. | Data buffer prefetch apparatus and method |
US5901147A (en) | 1996-08-30 | 1999-05-04 | Mmc Networks, Inc. | Apparatus and methods to change thresholds to control congestion in ATM switches |
US5999518A (en) | 1996-12-04 | 1999-12-07 | Alcatel Usa Sourcing, L.P. | Distributed telecommunications switching system and method |
US5864540A (en) | 1997-04-04 | 1999-01-26 | At&T Corp/Csi Zeinet(A Cabletron Co.) | Method for integrated traffic shaping in a packet-switched network |
US5970064A (en) | 1997-06-12 | 1999-10-19 | Northern Telecom Limited | Real time control architecture for admission control in communications network |
US5982783A (en) | 1997-06-16 | 1999-11-09 | Lucent Technologies Inc. | Switch distribution via an intermediary switching network |
-
1996
- 1996-05-15 US US08/648,556 patent/US6034945A/en not_active Expired - Lifetime
-
1997
- 1997-05-09 WO PCT/US1997/007839 patent/WO1997043869A1/en not_active Application Discontinuation
- 1997-05-09 CA CA002254104A patent/CA2254104A1/en not_active Abandoned
- 1997-05-09 AU AU30010/97A patent/AU730804B2/en not_active Expired
- 1997-05-09 JP JP09540952A patent/JP2000510308A/en active Pending
- 1997-05-09 EP EP97924631A patent/EP0898855A1/en not_active Withdrawn
-
2000
- 2000-01-24 US US09/490,548 patent/US6535484B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5434848A (en) * | 1994-07-28 | 1995-07-18 | International Business Machines Corporation | Traffic management in packet communications networks |
EP0706298A2 (en) * | 1994-10-04 | 1996-04-10 | AT&T Corp. | Dynamic queue length thresholds in a shared memory ATM switch |
Non-Patent Citations (1)
Title |
---|
KENJI KAWAHARA ET AL: "PERFORMANCE EVALUATION OF SELECTIVE CELL DISCARD SCHEMES IN ATM NETWORKS", PROCEEDINGS OF IEEE INFOCOM 1996. CONFERENCE ON COMPUTER COMMUNICATIONS, FIFTEENTH ANNUAL JOINT CONFERENCE OF THE IEEE COMPUTER AND COMMUNICATIONS SOCIETIES. NETWORKING THE NEXT GENERATION SAN FRANCISCO, MAR. 24 - 28, 1996, vol. 3, 24 March 1996 (1996-03-24), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 1054 - 1061, XP000622238 * |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6151323A (en) * | 1997-01-17 | 2000-11-21 | 3Com Technologies | Method of supporting unknown addresses in an interface for data transmission in an asynchronous transfer mode |
GB2321820B (en) * | 1997-01-17 | 1999-04-14 | Tadhg Creedon | Method and apparatus for buffer management in virtual circuit systems |
GB2321820A (en) * | 1997-01-17 | 1998-08-05 | Tadhg Creedon | A method for dynamically allocating buffers to virtual channels in an asynchronous network |
US6208662B1 (en) | 1997-01-17 | 2001-03-27 | 3Com Technologies | Method for distributing and recovering buffer memories in an asynchronous transfer mode edge device |
US6163541A (en) * | 1997-01-17 | 2000-12-19 | 3Com Technologies | Method for selecting virtual channels based on address priority in an asynchronous transfer mode device |
US6549541B1 (en) | 1997-11-04 | 2003-04-15 | Nokia Corporation | Buffer management |
EP0920235A2 (en) * | 1997-11-28 | 1999-06-02 | Newbridge Networks Corporation | Congestion management in a multi-port shared memory switch |
US7145868B2 (en) | 1997-11-28 | 2006-12-05 | Alcatel Canada Inc. | Congestion management in a multi-port shared memory switch |
EP0920235A3 (en) * | 1997-11-28 | 2000-02-09 | Newbridge Networks Corporation | Congestion management in a multi-port shared memory switch |
US7065088B2 (en) | 1998-01-19 | 2006-06-20 | Juniper Networks, Inc. | Asynchronous transfer mode switch with function for assigning queue having forwarding rate close to declared rate |
US8009565B2 (en) | 1998-01-19 | 2011-08-30 | Juniper Networks, Inc. | Switch with function for assigning queue based on a declared transfer rate |
FR2775546A1 (en) * | 1998-01-19 | 1999-09-03 | Nec Corp | Asynchronous transfer mode switch for traffic control |
AU745528B2 (en) * | 1998-01-19 | 2002-03-21 | Juniper Networks, Inc. | Asynchronous transfer mode switch with function for assigning queue having forwarding rate close to declared rate |
US7787468B2 (en) | 1998-01-19 | 2010-08-31 | Juniper Networks, Inc. | Switch with function for assigning queue based on a declared rate transfer |
US7391726B2 (en) | 1998-01-19 | 2008-06-24 | Juniper Networks, Inc. | Switch with function for assigning queue based on forwarding rate |
US6731603B1 (en) | 1998-01-19 | 2004-05-04 | Nec Corporation | Asynchronous transfer mode switch with function for assigning queue having forwarding rate close to declared rate |
US5987507A (en) * | 1998-05-28 | 1999-11-16 | 3Com Technologies | Multi-port communication network device including common buffer memory with threshold control of port packet counters |
GB2337905A (en) * | 1998-05-28 | 1999-12-01 | 3Com Technologies Ltd | Buffer management in network devices |
GB2337905B (en) * | 1998-05-28 | 2003-02-12 | 3Com Technologies Ltd | Buffer management in network devices |
EP1056245A3 (en) * | 1999-05-27 | 2004-05-12 | Alcatel Canada Inc. | Buffering system employing per traffic flow accounting congestion control |
EP1056245A2 (en) * | 1999-05-27 | 2000-11-29 | Newbridge Networks Corporation | Buffering system employing per traffic flow accounting congestion control |
US6717912B1 (en) | 1999-05-28 | 2004-04-06 | Network Equipment Technologies, Inc. | Fair discard system |
WO2000074432A1 (en) * | 1999-05-28 | 2000-12-07 | Network Equipment Technologies, Inc. | Fair discard system |
US7142564B1 (en) | 2001-02-07 | 2006-11-28 | Cortina Systems, Inc. | Multi-service segmentation and reassembly device with a single data path that handles both cell and packet traffic |
US7342942B1 (en) | 2001-02-07 | 2008-03-11 | Cortina Systems, Inc. | Multi-service segmentation and reassembly device that maintains only one reassembly context per active output port |
US7369574B1 (en) | 2001-02-07 | 2008-05-06 | Cortina Systems, Inc. | Multi-service segmentation and reassembly device that is operable in an ingress mode or in an egress mode |
US7298738B1 (en) | 2001-02-07 | 2007-11-20 | Cortina Systems, Inc. | Backpressuring using a serial bus interface and a status switch cell |
US7139271B1 (en) | 2001-02-07 | 2006-11-21 | Cortina Systems, Inc. | Using an embedded indication of egress application type to determine which type of egress processing to perform |
US7286566B1 (en) | 2001-05-08 | 2007-10-23 | Cortina Systems, Inc. | Multi-service segmentation and reassembly device that maintains reduced number of segmentation contexts |
US9008109B2 (en) | 2011-10-26 | 2015-04-14 | Fujitsu Limited | Buffer management of relay device |
Also Published As
Publication number | Publication date |
---|---|
AU730804B2 (en) | 2001-03-15 |
JP2000510308A (en) | 2000-08-08 |
US6535484B1 (en) | 2003-03-18 |
CA2254104A1 (en) | 1997-11-20 |
EP0898855A1 (en) | 1999-03-03 |
AU3001097A (en) | 1997-12-05 |
US6034945A (en) | 2000-03-07 |
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