A common problem we can meet on a device is the high CPU utilization. One of the first instincts when troubleshooting a high CPU utilization problem is to check the most active CPU tasks in order to determine which one is occupying a larger amount of the resources or to check the type and amount of packets sent to the CPU.
The latter procedure can be made by running the display cpu-defend statistics command which displays statistics on packets sent to the CPU, including the number of forwarded and discarded packets . According to the output of this command you can take different actions in order to limit or increase the rate of packets sent to the CPU.
In software versions newer than V2R7, this command can be run from the system view just on the S5720EI and S5720HI series switches.The S5700 SI/LI do not include the command in the system view:
Example:
[R5_U28_S5700_ACC]display version
Huawei Versatile Routing Platform Software
VRP (R) software, Version 5.160 (S5700 V200R008C00SPC500)
Copyright (C) 2000-2015 HUAWEI TECH CO., LTD
HUAWEI S5700-28X-LI-AC Routing Switch uptime is 0 week, 3 days, 4 hours, 48 minutes
[R5_U28_S5700_ACC]display cpu-defend ?
applied Applied
configuration Current configuration
policy CPU-defend policy
