On 8/5/2022 7:48 AM, mike tancsa wrote:
On 8/5/2022 2:19 AM, Jim King wrote:
On 8/4/2022 12:29 PM, mike tancsa wrote:
On 8/4/2022 1:12 PM, mike tancsa wrote:
On 7/31/2022 11:41 PM, Jim King wrote:
I'm trying to use a Qnap dual port 2.5Gb NIC with FreeBSD 13.1.
FreeBSD recognizes the NIC and I'm able to connect to my LAN at
1Gb. However, trying to push heavy traffic through the NIC
results in a temporary loss of connectivity: traffic stops and
the message "igc0: link state changed to DOWN" appears in the
system log. About 10 seconds later the message "igc0: link state
changed to UP" is logged, followed by some messages from dhclient
indicating that it has acquired a lease. At that point network
connectivity works normally, until I try to push a lot of traffic
again. I've been able to trigger this every time using iperf3
from another PC on my LAN, and by using Ookla's speedtest client
(my Internet service is good for about 900 Mbps).
How long does it take to wedge the nic ? I have a pair of Topton
routers (4 IGC NICs) back to back and a simple iperf3 test seems to
work ok between the 2 units.
Actually, I was able to reproduce this too running iperf3 -P4 for
about 60 seconds. Watching via sysutils/ifstat, it does indeed drop
traffic when the link drops
When I'm receiving traffic the wedge usually happens pretty quick.
iperf while connected at 1Gb (I get similar results at 2.5Gb):
If I fiddle with the Flow Control settings it seems to make a
difference. I can do it without bouncing the link. I wonder what the
Linux driver has as default ?
ie.
sysctl -w dev.igc.1.fc=1
sysctl -w dev.igc.0.fc=1
Does it help in your case ?
Thanks for the suggestion. Unfortunately it doesn't seem to help in my
case. All four values for flow control give pretty much the same
results with my iperf test.
Jim
