cpu-defend trap drop-packet
Function
The cpu-defend trap drop-packet command enables alarm reporting for packet loss caused by CPCAR exceeding.
The undo cpu-defend trap drop-packet command restores the default configuration.
By default, the system does not report alarms for packet loss caused by CPCAR exceeding.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S5735-L, S5735S-L, S5735S-L-M, S5735-S, S5735S-S, S5735-S-I, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.
Usage Guidelines
Usage Scenario
To protect the CPU, a switch limits the rate of protocol packets sent to the CPU based on the CPCAR. If the rate of protocol packets exceeds the CPCAR, excess protocol packets are dropped. As a result, the corresponding service may not run normally. To quickly detect packet loss caused by CPCAR exceeding, you can use this command to enable alarm reporting for this event. After this function is enabled, the switch checks for packet loss caused by CPCAR at 10-minute intervals. If the switch finds that the number of dropped packets of a protocol increases, the switch reports a packet loss alarm.
Precautions
After this alarm reporting function is enabled, the switch reports packet loss alarms based on protocol types. That is, if the rates of packets of multiple protocols exceed the CPCAR values set for these protocols, the switch reports an alarm for each protocol.