1. E2E performance measurement
In KREONET
SUPERCOMPUTING CENTER
KISTI
MIN KI NOH

2. CONTENTS KREONET INTRODUCTION 2. E2E N/W PERFORMANCE MEASUREMET
- AMP( Active Measurement Program)
- NDT
- FlowScan
- Network Performance Tester

3. KREONET NETWORK BACKBONE
- KREONET (Korea Research Environment Open Network) is a R&D network of Korea supported by Korean government.
- KREONET member are Currently over organizations (research institutes, universities, industrial, research laboratories)
- KREONET has 12 regional network centers & NOC in Daejeon, KISTI
- Major Network Services are IPv4/IPv6 Unicast Routing, Multicast routing, Lambda networking, QoS Service, TE..
- Major S&T resource service with KREONET are
National Supercomputing Center
TeraCluster(512CPU)
S&T DB Service
Advanced Experimental Facilities

4. INTERNATINAL LINKS
Seattle
622Mbps
Bandon
Seoul
(Dacom ITMC)
Sacramento
(MCI ITMC)
BEIJING
155Mbps
155KMbps
CSTNet
Chicago
Morro Bay
StarLight
Daejeon
155Mbps
1.2Gbps
1.2Gbps
155Mbps
: USA NetworkPeering Point
: ITRC
: Circuit Matching/Landing Point
: China NetworkPeering Point
KREONET/STARLIGHT (2004)
KREONET/STARTAP(2003)
KREONET/CHINA(2004)
- First Peer to North America connect with STAR TAP , 45Mbps
- STAR TAP peer change to StarLight & upgrade to Optical network (1.2Gbps)
- Interconnect to APAN pass through KOREN 1Gbps
- New Peer KREONET(Korea)/CSTNet(China) -> 310Mbps

5. AMP data after KREONET Backbone upgrade
Since 2001, AMP Server has operate and service for measuring backbone network performance.
Major AMP service is for monitoring backbone network performance among domestic regional centers (AMP give us Full mash performance data is so useful for NOC!)
Currently 11 of AMP Client has Operate and service.
(AMP server located in NOC)
URL:
We usefully used AMP data when had finished KREONET backbone upgrade work (It show us How improve Network performance after change to optical network)
Regional Center
Regional Center
Regional Center
Regional Center
Before
After
AMP data after KREONET Backbone upgrade

6. NDT
11 org. provide with Computational resource for big calculation on Grid environment.
NDT is service for GRID researchers
(e2e network performance is so important for grid & need system interface tuning)
NDT Server implemented in Grid Cluster & Supercomputer Domain in KISTI
(Service useful information to other cluster & supercomputer domain)
It useful when we have test 13 of application Performance on Grid environment.
(KISTI- Kunkook University)
URL:
Performance measure to NDT server
Performance measure to NDT server
NDT Server
In KISTI Cluster Domain
Performance measure to NDT server
KISTI
SCU
JBU
PNU
MJU
KumHo
SNU
POSTECH
IBM p630
SGI Origin
16 nodes cluster
IBM SP2
HP v2500
TMU

7. Network Performance Tester
TCP Performance Measure
-Measure bandwidth (Max. throughput)
-Report MSS/MTU size and observed read sizes.
-TCP window size control for performance tuning
UDP Performance Measure
-send/receive UDP streams
-packet loss/delay/jitter
Based on Iperf 1.64
easy measure with only Agent install & Web UI
Sender will be Client receiver will be Server
OS : Linux Debian Package & Perl above
System : Pentium 550Mhz, 128Mb RAM)
Service URL :
AGENT2
netloger
monitor
SLA SERVER
IPv6,IPv4
TCP/UDP
IPv6,IPv4
TCP/UDP
monitor
AGENT1
netloger

8. Network Performance Tester (Cont.)
STEP 1. Configure
STEP2. Realtime Monitor
STEP3. Test Result

9. FlowScan+ We need information about what flow our network.
FlowScan is a passive measurement tool drawing traffic graphs by analyzing network flows exported by routers and switches
NetFlow is exported CISCO routers and switches
FlowScan+ is improved by adding MySQL, and have a function query interface to get flow information analyzing flow data (IP, top user, flow type)

10. Thank you!