最近一个月专线一直掉线麻烦专家给诊断一下

%Dec 27 05:55:02:036 2021 HYJT-SR6608 DLOG/5/FanSpeedDec: Fan 1 SpeedDec %Dec 27 05:55:01:870 2021 HYJT-SR6608 SSHS/6/SSHS_VERSION_MISMATCH: SSH client 102.133.181.60 failed to log in because of version mismatch. %Dec 27 05:54:59:432 2021 HYJT-SR6608 SSHS/6/SSHS_DISCONNECT: SSH user root (IP: 92.255.85.37) disconnected from the server. %Dec 27 05:54:59:151 2021 HYJT-SR6608 SSHS/6/SSHS_LOG: Authentication failed for root from 92.255.85.37 port 31104 because of invalid username or wrong password . %Dec 27 05:46:12:194 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-pass. %Dec 27 05:45:56:598 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-fail. %Dec 27 05:43:21:645 2021 HYJT-SR6608 SSHS/6/SSHS_DISCONNECT: SSH user read (IP: 92.255.85.37) disconnected from the server. %Dec 27 05:43:21:370 2021 HYJT-SR6608 SSHS/6/SSHS_LOG: Authentication failed for read from 92.255.85.37 port 28250 because of invalid username or wrong password . %Dec 27 05:41:58:094 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-pass. %Dec 27 05:41:42:498 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-fail. %Dec 27 05:40:17:248 2021 HYJT-SR6608 SSHS/6/SSHS_VERSION_MISMATCH: SSH client 102.133.181.60 failed to log in because of version mismatch. %Dec 27 05:38:39:094 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-pass. %Dec 27 05:38:20:398 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-fail. %Dec 27 05:36:53:671 2021 HYJT-SR6608 SSHS/6/SSHS_DISCONNECT: SSH user root (IP: 176.111.173.237) disconnected from the server. %Dec 27 05:36:48:085 2021 HYJT-SR6608 SSHS/6/SSHS_LOG: Authentication failed for root from 176.111.173.237 port 59192 because of invalid username or wrong password . %Dec 27 05:32:03:194 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-pass. %Dec 27 05:31:44:498 2021 HYJT-SR6608 NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name adminyd1000m operation-tag 1: probe-fail. %Dec 27 05:22:58:132 2021 HYJT-SR6608 SSHS/6/SSHS_DISCONNECT: SSH user admin (IP: 176.111.173.237) disconnected from the server. %Dec 27 05:22:57:322 2021 HYJT-SR6608 SSHS/6/SSHS_LOG: Authentication failed for admin from 176.111.173.237 port 25592 because of invalid username or wrong password . 

路由器有4条专线组成，2条移动千兆做主备，2条联通、1条200m、1条100m。 adminyd1000m是第一条移动千兆专线经常掉线恢复。主要接收传输  监控平台使用，麻烦专家给诊断一下是什么原因造成，谢谢