CPU-Usage A5120-SI

[LS1971]

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

[LS1971]

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

Any ideas?

[manuel.bitzi]

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