ῌ ῌ ῌ ῍ ῌ ῍ ῍ ῌ ῍ ῌ ῌ ῍ ῍ ῌ ῌ ῏ ῌ ῌ ῐ ῏ ῐ ῌ ῍ ῏ ῌ ῐ ῌ ῍ ῌ ῌ ῍ ῍ ῎ ῌ ῌ ῍ ῌ ῌ ῍ ῎ ῌ ῌ ῍ ῏ ῌ ῌ ῐ ῌ ῌ ῍ ῌ 腀 腀 腇 腂 腈 腅 腄腇 腏 腓 腌 腍 腉腕腁腃腒腐腋腑腔腆腊腎 膴臷膧臹臦膽膳臝膱臚膽膳 臇 膼 臖 膼 臖 膸臗臷膧臷膧膚 膧膽膳膚 臱臹臦膡臊膪臯膽膳腹膔腻腀 腃腋腖腙腤腦 臡膦腇膰腋腒腑臎腚膿膙腚自腦 腊臉膷腚 膘臞腖腍腔腂腧腚腕 臇腎腧 膸臗臷膧臹臦膡臊膪臯膽膳腹膔腻腀腕腛 臢膲腝 臎 腙腤腒腔 臔腙 腓腚臣 腪膩臌腍腔腂腧 膁腀腻 腪膭腡 膵腚膪臯 腚膁腀腻腪膀膑膌腀腻 臐腙腤腦 臜 腪腍腔腂腧膊腷膔腚膄腽膂膓腀腲腱腀膃腚膂膎膈腭腽腲 膏腬膐腻腮膋腕臕 腍腔腂腧 膀膑膌腀腻腛臬 膣臭 膛 腖 臫臲腌腨腔腂腧膪臯 膈膑腽腾膣臭 膲腝臬 臩膣臭 臭腘腗腪臋腒腔臅腩腨腔腈腑腇 腚膈膑腽 膣臭 腞腚膝 臻膜臎膫 膗臁 腾膣臭腙臶 腌腨腧腤腃腘臆臰腕膖膟腘 臫臲膠 腘膣 腖 腎 腖膆腴腽膂至臑 腚膺臯腙腤腦 腥腨腧膣臭腚臡膦 臭腇膘 腙 膲腍腑臍腙腤腦 腤腦臛臏膀膑膌腀腻 臤膶腚臣 腕腁腧 臮臓腛 臐腪自腦臵腄腔腂腈 腙腛腐腚腟腖腫腗腇 臼 腪 腂腔 臁臓腛 腪 腂腔膺臯 臥腙臺腈膨腩腒腑 腠腑 腹膔腻腀 腕腚膁腀腻臼臥腣 腎腧 致膯膬腖腚膁腀腻臃膨腙腅腂腔腛腋腨腠腕腢 臼臥腪 臋腒腔臅腩腨腔腈腑 膪臯膁腀腻腚膻臯腙腛 腘 膙腇臄腄腥腨 臒臈腚膻 腖腛 腚 腕 膄腽 臯腚臎腙腛 臧腚 膙腇臘腘腒腔腍腠腃臍腇臠腘腉腘腂 膂膓腀腲腚 膢腪膩臌腎腧腾腀膐腕腁腦 腐腚腤腃腘膻臯腚臎 腗腚 腙臡膦腇腁腧腚腆自腦 腊 腚膞腕 臟 腌腨腔腂腧 膾 腛 臮 腔腂腈 膕腂 腪膘腓膘腓 腍腔腂腆腘腉腔腛腘腥腘腂 腚臼腦膐腀腻腚膂膎膈腭腽腲腪膩臌腎腧腑腡腚腾腀膐腖腍 膸臗臷膧腕腛膈膏腀腚腺膈膂腯腰腬腕腁腧 腔膤 腌腨腑腇 腖腂腃膐腀腻腣腵膔膇膍腀腻 臸 腕 膄腽膂膓腀腲腚膩臌腪臅 腘腗 膄腽膂膓腀腲腙臫臲腌腨腑臼臥膯膮腪膄腽膂膓腀腲 膹 腕膩臌 臨臂腎腧腑腡腚膉膒膂腵膐腪 腂腔臼臥腍腔 腂腧腑腡 腇臋腄腨腜膐腀腻腙臀腥腏膘 腚腶腀 膅腣腸腮腽腼腘腗腚臣 腢臕 臙 腧 腠腑 膥 膉膒腳 腃 腗 腖 腈 腈 腇 腎 腈 腇 腢 腢 腑 腕 腗 腁 腦 腆 腗 腂 腂 腘 腢 腄 腟 腥 腂 腜 腟 腚 腓 腍 腉 腤 腣 腄 腌 腏 腈 腗 腘 腈 腟 腟 腅 腞 腠 腤 腔 腠 腐 腒腕 腕 腚 腊腎 腛 腒腕 腀 腋 腙 腝 腟 腌 腗 腄 腡 腒 ῌ ῌ ῌ 1 No. Technical Research Report, Earthquake Research Institute, the University of Tokyo, No. , pp. , . * * Institute of Seismology and Volcanology, Faculty of Sci- ences, Kyushu University. http : //www.gnu.org/copyleft/gpl.html SNMP Simple Network Man- MRTG IP NTT Round Trip Time : RTT IP IP agement Protocol ping IP MRTG Multi Router Tra c Grapher GNU General Public License MRTG Multi SNMP Router Tra c Grapher IP SNMP Key words : MRTG, SNMP, ping, RTT, packet loss, seismic data transmission, network monitoring Abstract The objective of this paper is to describe the seismic network monitoring system using the Multi Router Tra c Grapher (MRTG) and the related software. MTRG has function monitors Simple Network Management Protocol (SNMP) network devices and gives illustration the tra c amount has through each interface. The mrtg-ping-probe is a ping probe for MRTG, which implementation to monitor the round trip time (RTT) and packet loss to seismic stations or servers. MRTG outputs function to generate graphs visualizing minimum and maximum RTT or packet loss. The seismic network monitoring sys- tem is developed using such software, and monitors the data tra c of the data acquisition servers and the IP line situations (i.e. RTT and packet loss) between the data center side and the observation station side end. In this paper, I describe concrete examples from actual operations, and show that this system is useful for maintenance of the seismographic network. Kenji UEHIRA* MRTG The Seismic Network Monitoring System Using MRTG Software * MRTG + + +. + +, ,**2 +. + +, ,**2 ,**2 2 +/ ,**2 +* -* .* ,**, ,**0 $ $ $ $ $
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No.Technical Research Report, Earthquake Research Institute, the University of Tokyo, No. , pp. , .
** Institute of Seismology and Volcanology, Faculty of Sci-ences, Kyushu University. http : //www.gnu.org/copyleft/gpl.html
SNMP Simple Network Man-
MRTG
IP
NTT Round Trip Time : RTT
IP
IP agement Protocol ping
IP
MRTG Multi Router Tra c Grapher
GNU General
Public License
MRTG Multi SNMP
Router Tra c Grapher IP
SNMP
Key words : MRTG, SNMP, ping, RTT, packet loss, seismic data transmission, network monitoring
Abstract
The objective of this paper is to describe the seismic network monitoring system using the MultiRouter Tra c Grapher (MRTG) and the related software. MTRG has function monitors Simple NetworkManagement Protocol (SNMP) network devices and gives illustration the tra c amount has througheach interface. The mrtg-ping-probe is a ping probe for MRTG, which implementation to monitor theround trip time (RTT) and packet loss to seismic stations or servers. MRTG outputs function to generategraphs visualizing minimum and maximum RTT or packet loss. The seismic network monitoring sys-tem is developed using such software, and monitors the data tra c of the data acquisition servers andthe IP line situations (i.e. RTT and packet loss) between the data center side and the observation stationside end. In this paper, I describe concrete examples from actual operations, and show that this systemis useful for maintenance of the seismographic network.
Kenji UEHIRA*
MRTG
The Seismic Network Monitoring System Using MRTG Software