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Knowledge Base

How to view the default cpcar of S9300 series switch V1R1 version, and modigy this cpacar value.

Publication Date:  2012-10-30  |   Views:  173  |   Downloads:  0  |   Author:  c00222574  |   Document ID:  EKB1000018713


Issue Description

S9300 v1r1 protects the protocol packet sending to cpu, it can view by the command of display cpcar, and it can be modified in cpcar packet-type [slot slot-number] view, the specific reference case SC0000492098/SC0000494969, but v1r2 version does not have this command.

Alarm Information


Handling Process

There is no v1r1 version dis cpcar command in user mode, configuration mode and hidden mode, but it has information exporting after directely implement:
[Quidway]dis cpcar config all                                                  
Cpcar Configurations on main board!                                            
Cpcar Configurations On Slot 1 !  
V1R2 version has been modified to cpu-defend command after confirming, check the commond as follows:
[Quidway]dis cpu-defend, modify by cpu-defend policy view and car packet-type command.
[Quidway]cpu-defend policy ?                                                   
   <1-16>  Configurable CPU-defend policy ID range
Then apply it on overall or board slot view.
[Quidway]cpu-defend-policy 1 ?                                                 
  global  Apply specific traffic policy                                        
Or the board slot is as follows:
[Quidway]slot 1
[Quidway-slot-1]cpu-defend-policy 1

Root Cause

Because S9300 is the convergence layer or core layer switch, whene packet lost is in switch interpart that proved by traffic count, it should to check protocol packet send cpu limiting situation, then modify it according to topology and business type.


In the process of handling S9300 series switch problem, it is important to control protocol packet sending cpu limiting and how to adjust, it can help us locate the problem and solved the problem fast.