1. Overview of Monitoring and Measurement System in EuQoS multi-domain network Marek Dabrowski 1, Philippe Owezarski 2, Wojciech Burakowski 1 and Andrzej Beben 1 1 Institute of Telecommunications, Warsaw University of Technology, Poland 2 LAAS-CNRS, France

2. TEMU 20052 Outline Introduction Architecture of EuQoS MMS MMS for supporting trials MMS for supporting EuQoS system functions Exemplary deployment Summary

3. TEMU 20053 Introduction (1) The measurements play a key role in modern IP networks, because: IP network becomes more and more complex  many domains administrated by autonomous operators  different network technologies, like DiffServ, MPLS, xDSL, WLAN, LAN,...  evolve towards multi-service networks able to provide QoS (Quality of Service) Provide knowledge about the network state useful for:  Traffic control, e.g. Measurement based Admission Control  Traffic engineering, e.g. provisioning  Operation and Maintenance: Fault detection Network anomaly detection Therefore, development of effective Monitoring and Measurement System (MMS) is a crucial part of a system design

4. TEMU 20054 Introduction (2) What is EuQoS? 6FR EU project: www.ist-euqos.orgwww.ist-euqos.org Objective: to develop solution for providing end-to-end QoS in multidomain, heterogeneous network QoS is provided by deployment of end-to-end Classes of Service (CoS), that support specific type of traffics with respect to their QoS requirements Use measurements to support EuSoS system functions: CAC, TERO, OAM Take a pragmatic approach EuQoS Approach

5. TEMU 20055 Introduction (3): EuQoS Architecture USER 1USER 2 EQ-SDP EQ-SIP Signaling EQ-SIP Signaling Network technology Independent sub-layer Network technology dependent sub-layer EQ-SDP in End-to-end QoS EQ-SIP signaling Access Network 1 QoS Domain i Access Network 2 QoS Domain k QoS Domain j RA1 RAk RAj RAi RAn RM1 RMi RMj RMk RM2 n Virtual Network Layer Application EQ-SDP EQ- ETP Protocols EQ- ETP Protocols EQ-NSIS EQ-SIP proxy EQ-SIP proxy Monitoring and Measurement System

6. TEMU 20056 Architecture of EuQoS MMS (1) The role of EuQoS MMS system is to provide tools for: performing trials of EuQoS system supporting EuQoS systems functions (CAC, TERO) on-line monitoring of QoS level offered by EuQoS CoSs (OAM) The key elements of EuQoS MMS we deal with are: location of the measurement points inside a network design of measurement tools measurement control

7. TEMU 20057 Architecture of EuQoS MMS (2) Intra-domain service in AS 1 Inter-domain service AS 1 -AS 2 Intra-domain service in AS 2 Location of Measurement Points (MP) Taking into account EuQoS network architecture All measurements are performed on the IP layer Measurement Points are placed in the points where particular CoS (intra- or inter-domian) begins or ends to operate AS- Autonomous System BR – Border Router

8. TEMU 20058 Architecture of EuQoS MMS (3) Reference location of MPs: In core network: MP X a – input interface of the ingress border router MP X b – entrance to the queue of output interface of the ingress border router MP X c – input interface of the egress border router. MP X d – entrance to the queue on the output interface of the egress border router In access network: MP X t – at IP interface of the user terminal

9. TEMU 20059 MMS for supporting trials (1) Objective: Validation the QoS level offered by EuQoS CoSs Methodology: establish a test flow load the network by background flows up to CAC limit in:  Tested CoS  Other CoSs Measure QoS parameters: IPTD, IPDV, IPLR, throughput for the test flow Tools: BTG: to load the network by aggregated traffic TrTG: to load the network by traffic reproduced from traces Netmeter: for measuring QoS parameters

10. TEMU 200510 MMS for supporting trials (2) Netmeter – tool for measuring QoS parameters One-Way Delay (OWD) IP Delay Variation (IPDV) Packet Loss Ratio (IPLR) throughput MOS aproximation for VoIP Methodology Uses active measurements, with MGEN generator Different traffic patterns:  CBR  Poissonian  ON/OFF  greedy TCP IPDV: IP Packet Delay Variation (IETF IPPM) OWD: One Way Delay

11. TEMU 200511 MMS for supporting EuQoS system functions (1) Objective: to support the performance of EuQOS system functions: Call Admission Control (CAC) MMS provides information about available inter-domain routing paths and the QoS level offered by them (gathered from EQ-BGP) MMS provides information about instantaneous load on the inter- domain links used for measurement based admission control Traffic Engineering and Resource Optimisation: MMS provides load carried inside each CoS used for network provisioning Operation & Mantainence On-line monitoring of QoS level (values of IPTD, IPDV, IPLR) offered by CoSs

12. TEMU 200512 MMS for supporting EuQoS system functions (2) MMS Measurement Controller Controlling the tools Collecting results Interface with EuQoS MMFM TAT TAT: Topology Acquisition Tool LLMT LLMT: Link Load Measurement Tool ORENETA ORENETA: QoS monitoring tool TAT

13. TEMU 200513 TAT: Topology Acquisition Tool ROUTER_IP |PREFIX |MASK|COS|STATUS|NEXT_HOP |AS_PATH |QOS (EQ-BGP) 10.205.0.1|10.203.0.0|16 |1 |BEST |10.203.0.1|65511 |10 32 7 N/A 10.205.0.1|10.203.0.0|16 |2 |BEST |10.203.0.1|65511 |5 16 7 N/A 10.205.0.1|10.203.0.0|16 |2 |ALT |10.204.0.1|65510 65509|5 16 7 N/A TAT: Tool for gathering available inter-domain routing paths Methodology Periodically reads EQ-BGP routing tables Exemplary results TAT

14. TEMU 200514 LLMT: Link Load Measurement Tool LLMT Measures average bit rate of carried traffic inside given COS Methodology Passive monitoring of a given link Capture packets with Tcpdump or DAG cards Count transmitted bytes Calculate average load in intervals of length  t Exemplary results Fri 07 Oct 2005 12:16:27 PM CEST-963093000 Total available BW (B/s): 99900000 Used BW per TOS value (B/s): TOS: 0 Used BW: 100000 TOS: 1 Used BW: 0 TOS: 2 Used BW: 0 TOS: 3 Used BW: 0 TOS: 4 Used BW: 0

15. TEMU 200515 ORENETA: QoS monitoring tool Tool for on-line monitoring QoS level offered by CoSs Methodology Passive, on-line measurements Real Time traffic capture Flow detection Obtained results One-Way Delay (OWD) IP Delay Variation (IPDV) Packet Loss Ratio (IPLR)

16. TEMU 200516 Exemplary deployment of MMS in WiFi Problems with deployment of MMS tools Limited access to the routers In case of WiFi it is not possible to use aggregate models of background traffic as the number of terminals influence results MP1, MP2, MP3 has installed: Netmeter Oreneta BTG TRTG MMS Controller TAT Netmeter analyser Oreneta analyser LLMT Controller

17. TEMU 200517 Summary The paper presents an overview of MMS system designed for EuQoS There are two groups of MMS tool: tools for trials tools for supporting EuQoS system functions Developed tools are ready and will be used planned tests