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The utilizing rate of router R2630 is very high, reaching 100%.

Publication Date:  2019-07-12 Views:  467 Downloads:  0

Issue Description

The utilizing rate of router R2630 is very high, reaching 100%. The underlying LAN PC goes on line at very low speed.

Alarm Information


Handling Process

1. make anti-virus access-controlling list, after sending at the exterior network interface and interior interface of R2630, the utilizing rate of CPU still reaches 100%.
2. because the loaded version of R2630 is the old command lines, so we cannot check nat session entries and not know which IP connecting number is over,turn on the switch of debug ip packet,the detailed steps are:
under config mode:
logging on
logging monitor(telnet user,if log from interface console, adopt logging console)
under the privilege mode:
debug ip packet
detect some IP sends packets frequently, and the destination address is not stationary. Prohibit this IP via ACL, and then the CPU decreases to about 30%, the service of underlying users resumes normal.

Root Cause

The CPU occupying rate of the route is too high, the main reason is due to virus attack, especially as the utilizing rate of CPU reaches 100%.