HP 1910 Gigabit Ethernet Switch Series Slow ports

Hi everyone,

I encounter a problem with a HP v1910 48 ports (not a POE model).

While there is no QOS configuration in any port, some (2 or 3) of them behave as if they were under bandwidth control.

Indeed, some ports are stuck at ~10 mbps, while others are stuck at 56 mbps~, but there are all configured at 100 mbps. Even if I configure them at 1000 mbps, nothing changes.

I checked again and again, even in CLI, but there is nothing that can explain this rate limit. I even try some changes from CLI or Web interface,but nothing changes.

Thanks for any help.