evaluation of the udlr environment takeshi usui takeshi@sfc.wide.ad.jp

Evaluation of the UDLR environment

Takeshi Usui

Takeshi@sfc.wide.ad.jp

Today my presentation

Introduction about my research topic “The evaluation of the UDLR network　 environment”

Introduction of the monitoring for UDLR Request to each UDL operators from me

Introduction of my research topic

“The evaluation of the UDLR network environment “

The Background The UDL partners usually have the narrow

band link for the terrestrial return link The traffic from the partners go throughout

the narrow band link to Feed. For the narrow terrestrial link,partners can’t

use the UDL effectively.

UDL is wide-area broadcast link,but return link is point to point.The ability of Return link is various.

Motivation

Much Data traffic go throught the UDL,but the terrestrial return link is necessary Web browzing request packet File transfer request packet

We want to have a bidirectional communication using UDL Using Audio,and Movie

狭帯域

AI3 network

Narrow band 　　 Qos available Point

Receiver(many)

Feeder

ISPPartners ISP

My research topic

What is minimum requriment of the terrestrial link for some application

QoS is effective or not in Border Router This is depending of the partners network

I will research

Now I monitor the nature of UDLR network What a kinds of application is used? How much bandwidth is used?

I classify the UDLR network environment Application using is effectiv or not What kinds of return link do we need the UDL link? QoS is effective or not

Protocol monitoring

I use the “tcpdump”and “tcpdstat” Tcpdstat

We can get summary information of a tcpdump file.

Example(CHULA)

Traffic monitoring①

Mrtg monitors the sfc-udl-feed.(http://www.ai3.net/op/mrtg/)But,we don’t know how much partners use in “udl shared link”

Traffic monitoring②

This 　 tools is base on “rrdtool”,and my tiny program.

We can monitor the each partner’s traffic ,and the time trend.

RTT monitoring

http://sfc-serv.ai3.net/cgi-bin/ping.cgi

I summary these to “ http://udl-monitor.ai3.net/”.

Please see the page.

My request to UDL operators

I want to research the nature of the terrestrial link Bandwidth,Packet loss,Straight delay

Please make my account to the UDLR Router in your network I set up the measurement program in your router

By using the data,I classify the UDLR environment

Next step

I research what a kinds of QoS technology is effective Ex. Any queueing technology,duplicated pack

et methods

I design the tunnel relay router ,which purpose reduce the feed load,and decrease the pass router.