Download at full speed then got packet loss

AndyRH

@stephenw10 said in Download at full speed then got packet loss:

Celeron N4100

More for my own education than anything, why is the general theme that the HW pfSense is running on is the problem and not the ISP with what looks to be a full link?

While Realtek NICs are not the best, the speed is only 25% of what the NIC should be able to do, so it is not stressed. I would not expect a unstressed NIC causing a problem.

I run on an i3 540 with 4 port Intel 1Gb NIC and even with a speed test running @ 980Mbps and file copies crossing the other NICs I see no change in pings and a CPU getting close to 30%. The CPU in the problem system is generations newer and should be faster per cycle than mine.

Lip

@andyrh
Unfortunately I can not say what the problem is. I only know that if there is no full load traffic on the line, there is no packet loss. I also think that my hardware should be sufficient.

stephenw10

@andyrh said in Download at full speed then got packet loss:

why is the general theme that the HW pfSense is running on is the problem and not the ISP with what looks to be a full link?

It isn't, not here at least. As I said there I would expect that CPU to pass 300Mbps with ease and the output from top showed that to be true.
I would always expect to see some increase in latency when you use more WAN bandwidth but not packet loss as we're seeing here.
I would not expect to see either when loading the CPU with traffic between other interfaces. Unless you are maxing at least one core completely.

Steve