1 architecture and scalability of a high-speed traffic measurement platform with a highly flexible...
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Architecture and scalability of a high-speed traffic measurement platform with a highly flexible packet classification
Author:Detlef Sas *, Simon Hauger, Martin KohnPublisher:Computer Networks 53 (2009)Presenter:Han-Chen ChenDate:2009/10/28
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Outline Introduction Traffic Measurement Architecture of I2MP Scalability of I2MP Performance
* I2MP (IKR Internet Measurement Platform)
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Introduction Evolving network technologies, new web
services and changing usage patterns continuously change traffic characteristics. But a thorough understanding of the traffic is the basis for many applications in networking.
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Traffic Measurement - purposes
network management health monitoring troubleshooting accounting
network control traffic characterization modeling
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Traffic Measurement -Functional blocks Reception of data from the network link
Decoding line signal including error checks and restoring packets
Decapsulate packets from lower layer protocols Time stamping Pre-processing
Passive Active
Storing data
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Traffic Measurement -Platforms
For processing data General-purpose processors (GP-CPU) Network processors (NP) FPGA and ASIC
For storing the measured data HD RAM
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Architecture of I2MP
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Hardware Unit
• Interface
• Time Stamping unit
• Classification and Filtering unit
1. decode protocol
2. classification packet
3. filter packet
• Assembly unit
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Hardware Unit
Classification and Filtering Unit
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Hardware Unit
Processing of a packet by Protocol Layering Decoder
Protocol tag
index
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Hardware Unit
Find the relevant criteria
Find the all rules which contains these criteria
Find the highest priority rule
Classifier TCAM TCAM
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PC UnitOnline mode Offline mode
1.Reception of data containers
2.Post-processing of data records
3.Storage of the final trace
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Scalability of I2MP Throughput of Hardware unit
1. Increase clock rate
2. Increase number of bytes processed in each clock rate
• Increase internal word width
• Replicate the entire system or those parts of limit the overall throughput
3. Process the first part of each packet
Classification criteria and rulesIncreasing those parameters does not deteriorate the system’s throughput.
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Performance
• 16 bytes word width• Clock rate of 60MHz (FPGA)• Packet size of 200Bytes• Throughput of 20Gb/s (Ethernet, IP, TCP)
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Thanks for your
listening