1. Unique Packet Identifiers for Multipoint Monitoring of QoS Parameters Juraj Giertl, František Jakab Gorazd Baldovský, Ján Genči

2. Content Introduction to QoS parameters monitoring The BasicMeter Project Unique packet identifiers Experiments Future plans

3. Quality of Service in Computer Networks QoS parameters of network traffic Volume parameters bandwidth packet rate packet loss Time parameters one way delay jitter (delay variation) round-trip time

4. The BasicMeter Project BEEM BasicmEter Exporting and Metering Process JXColl Java XML Collector BM Analyzer BasicMeter Analyzer ACP Analyzer Collector Protocol AEP Analyzer Exporter Protocol

5. Multipoint Monitoring Parameters requiring more than one metering point one way delay jitter packet loss Multipoint monitoring with packets identification

6. Requirements to Identifiers Uniqueness of identifiers Length of identifiers Data security Speed of identifiers generation

7. IP Packet Analysis IP packet structure suitable fields for identifiers generation header length, total length of packet, identification, protocol, source IP address, destination IP address.

8. Identifier Generation

9. Conclusion - Results of Experiments (1) Test of collisions occurrences Population350.000 packets Packets’ collisions2,64 % Raw IDs’ collisions3,81 % MD5 IDs’ collisions3,81 % Filtered packets1,26 % Unique IDs (using filter)97,45 %

10. Conclusion - Results of Experiments (2) Test of performance FunctionRaw IDMD5 ID Throughput [packets per second] 2.040.816787.401 Throughput [Mbps] (the worst case) 1.045403 Throughput [Mbps] (average case) 11.7394.529

11. Future Plans improvement of effectiveness of identifiers generation elimination of repeating hardly predictable same packets implementation of extensions of BasicMeter interface for intrusion detection systems traffic engineering usage-based billing and accounting implementation of adaptive sampling into BEEM MPLS support IPv6 support