NE40E CPU is high sometimes.

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      Issue Description

NE40E CPU is high sometimes.

5fbf0d11993f499cbe22fa3998e1e01d

transparent.gif Alarm Information

65ca2fd43b844325a406b0963a20b089

transparent.gif Handling Process

From the current information, the CPU high because of that there are too many SNMP request to NE40E, you added too many nodes on NMS. Please delete some monitoring task on NMS. If cant, please filter those IP address on NE40E to reduce the CPU usage. The details are as follows.

1.    When CPU usage is high, the CMF and IFM process is high. Those two process high means that there are too many NMS tasks collecting interfaces information and make CPU high.

2.  From the process, there are many MTif script operation, it means there are too many NMS tasks collecting interfaces information.

[NE40E-diagnose]disp cmf luascript  history  p 3  

*************************************BEGIN*************************************

The   history script from ecm: <?xml:namespace prefix = "o" />


TransNo       SessionID   Optype        MsgType     pSptCb        RunNum      RunRetCode  SptRetCode    TotalMem(K)  CurSptMem(K)  LoadTime(ms)    MicroRunTime(ms)  SptFileName

StartRunTime                         FinishRunTime                        CancelTime                         TimeOut                              LuaLastErrInfo

0x14e62403    0x0000028b  0x00000009  0x00000005  0x5c44228c    4             0x00800910  0x00000000    98391        48              0               20                  MTIf.lua

2017-10-30   22:43:47.752+05:30      2017-10-30   22:43:47.768+05:30      0000-00-00   00:00:00:000             -0001-11-29 16:00:000                

0x14e62404    0x0000028b  0x00000009  0x00000005  0x5c44228c    4             0x00800910  0x00000000    98441        50              0               10                MTIf.lua       

2017-10-30   22:43:47.769+05:30      2017-10-30   22:43:47.786+05:30      0000-00-00   00:00:00:000              -0001-11-29 16:00:000             

0x14e62405    0x0000028b  0x00000009  0x00000005  0x5c44228c    4             0x00800910  0x00000000    98490          47              0               10                  MTIf.lua       

2017-10-30   22:43:47.786+05:30      2017-10-30   22:43:47.803+05:30      0000-00-00   00:00:00:000              -0001-11-29 16:00:000                  

0x14e62406    0x0000028b  0x00000009  0x00000005  0x5c44228c    4             0x00800910  0x00000000    98541          51              0               10                  MTIf.lua      

2017-10-30   22:43:47.806+05:30      2017-10-30   22:43:47.824+05:30      0000-00-00   00:00:00:000              -0001-11-29 16:00:000   

......

3.     From the logs, some source IP sent many pakcets to NE40E, expecially 20.x.x.520.x.x.10.

[NE40E_-diagnose]disp snm dia ac

------------------------------------------------------------------------------------------------------------------------------------

Last   Accessed Users      

------------------------------------------------------------------------------------------------------------------------------------

NMS-IP/Port/VPN                           Access-Time                             Pkt-Len  Count                       

------------------------------------------------------------------------------------------------------------------------------------

x.x.x.x7/42372/0                                2017-10-30, 22:51:01:041+05:30          825      16982

20.x.x.5/59959/0                                2017-10-30, 22:51:00:115+05:30          102      46427427

y.y.y.y/49630/0                              2017-10-30,   22:51:00:096+05:30        78        42629

20.x.x.10/62853/0                               2017-10-30, 22:50:59:338+05:30          122      1657930       

y.y.y.y/44325/0                               2017-10-30, 22:50:47:691+05:30        43         2492

……

[NE40E_-diagnose]disp snm dia ac

 ------------------------------------------------------------------------------------------------------------------------------------

Last   Accessed Users       

------------------------------------------------------------------------------------------------------------------------------------

NMS-IP/Port/VPN                                     Access-Time                             Pkt-Len  Count

------------------------------------------------------------------------------------------------------------------------------------

x.x.x.x/42372/0                                2017-10-30, 22:51:08:741+05:30          825      17054

20.x.x.5/60058/0                                2017-10-30, 22:51:08:116+05:30          102      46427468

……

20.x.x.10/62853/0                               2017-10-30, 22:51:01:844+05:30        118        1657938

……



transparent.gif Root Cause

The CPU high because of that there are too many SNMP request to NE40E.

transparent.gif Solution

Delete some tasks on NMS or shorten the intercal of collecting data.

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