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Overview of Monitoring and Measurement System
in EuQoS multi-domain network
Marek Dabrowski1, Philippe Owezarski2, Wojciech Burakowski1 and Andrzej Beben1
1Institute of Telecommunications, Warsaw University of Technology, Poland2LAAS-CNRS, France
TEMU 2005 2
Outline
Introduction
Architecture of EuQoS MMS MMS for supporting trials MMS for supporting EuQoS system
functions
Exemplary deployment
Summary
TEMU 2005 3
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
TEMU 2005 4
Introduction (2)
What is EuQoS?
6FR EU project: www.ist-euqos.orgObjective: to develop solution for providing end-to-end QoS in multidomain, heterogeneous network
Providers
Corporate
SME
Research
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
TEMU 2005 5
Introduction (3): EuQoS Architecture
USER 1 USER 2
EQ-SDP
EQ-SIPSignaling
EQ-SIPSignaling
Network technology Independent sub-layer
Network technology dependent sub-layer
EQ-SDP in
End-to-end QoS EQ-SIP signaling
AccessNetwork
1
QoSDomain
i
AccessNetwork
2
QoSDomain
k
QoSDomain
j
RA1 RAkRAjRAiRAn
RM1 RMi RMj RMk RM2n
Virtual Network Layer
Application Application
EQ-SDP
EQ-ETP
Protocols
EQ-ETP
Protocols
EQ-NSIS EQ-NSISEQ-NSIS EQ-NSIS
EQ-SIPproxy
EQ-SIPproxy
Monitoring and Measurement System
TEMU 2005 6
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
TEMU 2005 7
Architecture of EuQoS MMS (2)
AS1
output port
Egress BR
AS2
input ports
Router input port
Ingress BR
Ingress BR
Ingress BR output port
Intra-domain service in AS1
Inter-domain service AS1-AS2
Intra-domain service in AS2
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
TEMU 2005 8
Architecture of EuQoS MMS (3)
Reference location of MPs:In core network:
MPXa – input interface of the ingress border router
MPXb – entrance to the queue of output interface of the ingress border router
MPXc – input interface of the egress border router.
MPXd – entrance to the queue on the output interface of the egress border router
In access network: MPX
t – at IP interface of the user terminal
AS2
Intra-domain measurements
Inter-domain measurements
Intra-domain measurements
Inter-domain measurements
AS3 AS4
MP2a MP2
b MP2d MP3
a MP3b MP3
d MP4b MP4
a
Access network measurements
AS1
MP1t
Access network measurements
MP1d
Inter-domain measurements
MP4t
MP3c MP2
c MP1c
BR BR BR BR BR BR AN4
AN1
AS: Autonomous System BR: Border Router AN: Access Network MP: Measurement Point (reference location)
TEMU 2005 9
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
GEANT
BR
QoS meter (MMS)
QoS meter (MMS)
EuQoS application(or Foreground Traffic Generator)
EuQoS application(or Foreground Traffic Generator)
QoS meter (MMS)
QoS meter (MMS)
BR
Application traffic
EuQoS system 1 EuQoS system 2
Intra-domain CoS monitoring
Inter-domain CoS monitoring
Intra-domain CoS monitoring
Background Traffic Generators (MMS)
Background traffic
Background Traffic Generators (MMS)
Background traffic
End-to-end QoS monitoring
TEMU 2005 10
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
TEMU 2005 11
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
TEMU 2005 12
QoS Domain
BR GEANTAccess network equipment
ORENETA Meter
MMS Measurement Controller
LLMT
Terminal
ORENETA AnalyserTMT
ORENETA Meter
MMS
Passive monitoring
Passive monitoring
Passive monitoring
capt
ured
pac
kets captured packets
link load
inte
r-do
ma
in
routin
g ta
ble
EuQoS RM DBEuQoS MMFM
EuQoS system
MMS for supporting EuQoS system functions (2)
MMS Measurement ControllerControlling the toolsCollecting resultsInterface with EuQoS MMFM
TATTAT: Topology Acquisition Tool
LLMTLLMT: Link Load Measurement Tool
ORENETAORENETA: QoS monitoring tool
TAT
TEMU 2005 13
BR1 (BGP)
MMS Measurement Controller
BR2 (BGP)
TMT
EuQoS MMFM
NOTIFY TOPOLOGY
CHANGE <cause>
REQEST TOPOLOGY
TOPOLOGY:
<prefix>
<prefix>
...
SH
OW
IP B
GP
BG
P ro
utin
g ta
ble S
HO
W IP
BG
PB
GP
routing table
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/A10.205.0.1|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
TEMU 2005 14
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
QoS Domain 1
BRInter-
domain link
QoS Domain 2
BRBR BR
TERO
CAC
Fri 07 Oct 2005 12:16:27 PM CEST-963093000Total available BW (B/s): 99900000Used 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
TEMU 2005 15
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)
TEMU 2005 16
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
Border router
GPS
AP
MMSControler
MP2
MP1
WiFiusers
MP3
Link to other
testbeds
CISCO AIRONET 1200 I WIRELESS ACCESS POINT
TEMU 2005 17
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