RTX1210のZabbix監視が途切れるのを解決したい

前提・実現したいこと

YAMAHA RTX1210ルータをZabbixで監視しているのですが、頻繁に監視の値が途切れる事象が発生。
これを解決したいです。

発生している問題・エラーメッセージ

2683:20200914:132836.055 enabling SNMP agent checks on host "RTX1210": host became available
2683:20200914:132906.087 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds
2685:20200914:132921.215 resuming SNMP agent checks on host "RTX1210": connection restored
2685:20200914:132951.227 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds
2680:20200914:133036.096 resuming SNMP agent checks on host "RTX1210": connection restored
2683:20200914:133036.182 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds
2680:20200914:133121.202 resuming SNMP agent checks on host "RTX1210": connection restored
2685:20200914:133121.421 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds
2684:20200914:133136.375 SNMP agent item "rtx.pp.discovery" on host "RTX1210" failed: another network error, wait for 15 seconds
2680:20200914:133151.238 SNMP agent item "yrhInboxTemperature" on host "RTX1210" failed: another network error, wait for 15 seconds
2681:20200914:133206.049 resuming SNMP agent checks on host "RTX1210": connection restored
2683:20200914:133206.295 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds
2702:20200914:133221.092 resuming SNMP agent checks on host "RTX1210": connection restored
2681:20200914:133236.072 SNMP agent item "yrhInboxTemperature" on host "RTX1210" failed: first network error, wait for 15 seconds
2702:20200914:133251.116 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: another network error, wait for 15 seconds
2702:20200914:133306.145 resuming SNMP agent checks on host "RTX1210": connection restored
2702:20200914:133336.176 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds
2701:20200914:133421.093 temporarily disabling SNMP agent checks on host "RTX1210": host unavailable

試したこと

YAMAHAのサポートに問い合わせましたが現状原因分からないそうです。

補足情報（FW/ツールのバージョンなど）

Zabbixバージョン：4.4.10

スクリーンショットを添付します。

DreamTheater

2020/09/14 04:25

ルーターってことなのでSNMP使用した監視ですよね？ ZABBIXサーバのログに警告やエラーメッセージは出力されてないですか？

yami_0613

2020/09/14 04:35

DreamTheater様コメントありがとうございます。 ZabbixのGUI上にはエラーが出ておりませんが、/var/log/zabbix/zabbix_server.logにエラーが出ておりました。私も今気づきました。下記エラーです。（一部抜粋です。） 2683:20200914:132836.055 enabling SNMP agent checks on host "RTX1210": host became available 2683:20200914:132906.087 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds 2685:20200914:132921.215 resuming SNMP agent checks on host "RTX1210": connection restored 2685:20200914:132951.227 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds 2680:20200914:133036.096 resuming SNMP agent checks on host "RTX1210": connection restored 2683:20200914:133036.182 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds 2680:20200914:133121.202 resuming SNMP agent checks on host "RTX1210": connection restored 2685:20200914:133121.421 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds 2684:20200914:133136.375 SNMP agent item "rtx.pp.discovery" on host "RTX1210" failed: another network error, wait for 15 seconds 2680:20200914:133151.238 SNMP agent item "yrhInboxTemperature" on host "RTX1210" failed: another network error, wait for 15 seconds 2681:20200914:133206.049 resuming SNMP agent checks on host "RTX1210": connection restored 2683:20200914:133206.295 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds 2702:20200914:133221.092 resuming SNMP agent checks on host "RTX1210": connection restored 2681:20200914:133236.072 SNMP agent item "yrhInboxTemperature" on host "RTX1210" failed: first network error, wait for 15 seconds 2702:20200914:133251.116 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: another network error, wait for 15 seconds 2702:20200914:133306.145 resuming SNMP agent checks on host "RTX1210": connection restored 2702:20200914:133336.176 SNMP agent item "yrhMemorySize" on host "RTX1210" failed: first network error, wait for 15 seconds 2701:20200914:133421.093 temporarily disabling SNMP agent checks on host "RTX1210": host unavailable

DreamTheater

2020/09/14 04:47

監視できている時間帯もあるので、ネットワーク品質自体に問題があるのでは？ RTX1210の監視を始めた当初から発生しているか、あるときから突然発生しているのかで原因が異なるかもしれませんね。日本ZABBIXユーザー会に問い合わせてみてはいかがでしょうか？

yami_0613

2020/09/14 05:01

ありがとうございます。エラーの調査と日本ZABBIXユーザー会に問い合わせてみます。

DreamTheater

2020/09/14 05:08

日本ZABBIXユーザー会は会員登録（無料）が必要です。