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CPU-Usage A5120-SI

LS1971
Frequent Advisor

CPU-Usage A5120-SI

Hi,

 

I have noticed a strange behaviour of an A5120-SI switch. OK, the behaviour seems strange to me. :-)

 

If I check CPU-Usage on a new switch, I get approx. 5%. If I plug in a SFP module it raises to approx. 12%, a second one lets it raise to approx. 20%, and a third one to approx. 27%. Is this behaviour by design? The switch is not connected to anything and not configured. The same CPU-Usage shows up on a A5120-SI with three SFPs in an IRF fabric.The software installed on the switch is Comware Version 5.20 Release 1505P07, the latest available.

 

Regards, Leonardo


 

Regards, Leonardo
2 REPLIES
LS1971
Frequent Advisor

Re: CPU-Usage A5120-SI

Digging into the CPU-Usage issue we could find out that the "DrvT" task ist consuming CPU time (see attached .jpg screenshots).

 

Any ideas?

 

 

Regards, Leonardo
manuel.bitzi
Trusted Contributor

Re: CPU-Usage A5120-SI

Hi

 

Yes, this is usual. I discovered this on several devices.

The explenation of the R&D was, that they have to poll the up/down-state of the sfp links every ms to react to changes.

 

 

br

Manuel

H3CSE, MASE Network Infrastructure [2011], Switzerland