SNMP cuasing RTA LOSS

[razdaseek54645564]

I hope this finds you well, I was notified by Nagios about CPE RTA loss and it occurs every 5/6 min. Logging into, I saw that SNMPserver is denying x.x.x.x address which is normal because I did only allowed 2 other particual ip address to be snmp agents.

The issue is everytime packet get dropped router freeze and Nagios send me a notification. Is it a problem with router config or something else. Please advise.

*Oct 19 21:04:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 39 packets
*Oct 19 21:09:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 39 packets

Thank you for your great help

[balaji.bandi]

what router device is this, and what IOS code running

when you running cpu stats what is the outcome ?

[razdaseek54645564]

ISR4321/K9 / IOS-XE ROMMON

#show process cpu
CPU utilization for five seconds: 0%/0%; one minute: 0%; five minutes: 0%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
1 2 21 95 0.00% 0.00% 0.00% 0 Chunk Manager
2 352370 1163185 302 0.07% 0.00% 0.00% 0 Load Meter

......

[balaji.bandi]

You need to issue that command in when you see freezing

may be worth post below output :

show process cpu sorted | ex 0.00

show process cpu history

[Georg Pauwen]

Hello,

what are you actually logging, can you post the (relevant part of the) configuration ? It could also be that the log message itself causes the router to freeze, so maybe a logging discriminator would help...something like the below should keep those messages out of your logs:

logging discriminator DROP_LOG msg-body drops list WinSnmpServers

!
logging buffered discriminator DROP_LOG
logging console discriminator DROP_LOG
logging monitor discriminator DROP_LOG

[razdaseek54645564]

Kindly check below:

#sh log

*Oct 21 11:57:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 12:02:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 12:08:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 12:13:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 12:19:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 12:24:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 39 packets
*Oct 21 12:29:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 39 packets
*Oct 21 12:34:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 39 packets
*Oct 21 12:39:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 12:45:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 12:51:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 12:56:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 13:02:02.937: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 13:07:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 13:13:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 13:18:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 13:24:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 13:30:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 48 packets
*Oct 21 13:35:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 13:40:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets
*Oct 21 13:45:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 39 packets
*Oct 21 13:51:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 47 packets
*Oct 21 13:56:02.938: %SEC-6-IPACCESSLOGS: list WinSnmpServers denied x.x.x.x 40 packets

#show process cpu sorted | ex 0.00
CPU utilization for five seconds: 0%/0%; one minute: 0%; five minutes: 0%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
240 6887599 584946118 11 0.07% 0.08% 0.08% 0 Inline Power
174 2124934 92010327 23 0.07% 0.03% 0.02% 0 VRRS Main thread

#show process cpu history

111111111111111111513221111111111111111111349141111111111111111111111111
100
90
80
70
60
50
40
30 *
20 *
10 * * *
0....5....1....1....2....2....3....3....4....4....5....5....6....6....7..
0 5 0 5 0 5 0 5 0 5 0 5 0
CPU% per hour (last 72 hours)
* = maximum CPU% # = average CPU%

[balaji.bandi]

as per the output does not see any issue here as per the cpu concerns.

if it ok post show run full config.

show version

[razdaseek54645564]

thank you for your kind help. unfortunately I cannot share router full conf.

Final quesiton: when router freeze during 5sec RTA will automatically be lost during that periode right ?