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High CPU Utilization CISCO 877M DNS Server Input

sameershrestha
Level 1
Level 1

Hi All,

I have having some issues with my CISCO 877M router. It is showing high CPU utilization and the users are getting intermittent/dropping out internet.

Plesae see below the "Show processes cpu" results

CPU utilization for five seconds: 100%/5%; one minute: 99%; five minutes: 99%

PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process

204          56     69562          0  0.00%  0.00%  0.00%   0 Multilink PPP

205          72     23389          3  0.00%  0.00%  0.00%   0 DNS Server

206     9797600     47577     205935 89.00% 88.62% 85.46%   0 DNS Server Input

207         160      2349         68  0.00%  0.00%  0.00%   0 IP SLAs Event Pr

208         412     71507          5  0.00%  0.00%  0.00%   0 NTP

Please advise what could be the possible issue.

let me know if further information is required.

Thank You,

2 Replies 2

paolo bevilacqua
Hall of Fame
Hall of Fame

Disable service from router, use public DNS servers.

Apart from disabling the services, anything else we can implement to prevent the high usage of CPU from DNS Server?

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