[PLUG] Debian Buster and USB3...

[Mike C.]

Is the USB network adapter support stable in Debian Buster? I ask because I
suspect that my USB3 gigabit network
card is dropping packets.

-- If it wasn't supported the driver wouldn't install, the module wouldn't
load and you wouldn't see the NIC listed in lsusb.

-- With that being said, NIC drivers can also have bugs and in my
past experience, especially with WIFI NIC drivers, it's possible to install
a non-compatible / non-working driver. Probably a much less common problem
these days.

When I ping www.yahoo.com 10 times through this USB adapter hooked up to my
Spectrum cable modem, I lose anywhere from 0% to 60% of the packets and
this is happening consistently.

-- Possibly bad test and bad assumptions. There are many network devices
(hops) between your NIC and a yahoo server. Packets could be dropped or is
often the case just discarded as the device is configured not to respond to
ICMP packets.

-- If you really think there's a local problem with the NIC itself, start
with testing the NIC first and then move out one step at a time.

1. Ping the loopback address of 127.0.0.1 to verify/ensure there's no
TCP/IP stack issues.

2. Ping the ip address of the USB GIG NIC.

3. Ping the next hop ip address on the same ip subnet as the USB GIG NIC.
The LAN gateway ip addr.

4. Ping the WAN side ip addr of your internet router.

If that all checks good, then any network connectivity issues you're
experiencing are out of your control.

On Wed, Apr 15, 2020 at 3:30 PM <michael at robinson-west.com> wrote:

> Is the USB network adapter support stable in Debian Buster? I ask because
> I suspect that my USB3 gigabit network
> card is dropping packets.
>
> When I ping www.yahoo.com 10 times through this USB adapter hooked up to
> my Spectrum cable modem, I lose anywhere
> from 0% to 60% of the packets and this is happening consistently.
>
> I do:
>
> $ ping -c 10 www.yahoo.com ; sleep 15 ; ping -c 10 www.yahoo.com ; sleep
> 15 ; ping -c 10 www.yahoo.com ; sleep 15 ; ping -c 10 www.yahoo.com
>
> If I'm lucky, one of these four rounds of ping will have a drop rate of 0%.
>
>  -- Michael Robinson
>
> michael at filter:~$ lsusb
> Bus 009 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 007 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
> Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 005 Device 002: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit
> Ethernet
> Bus 005 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
> Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> michael at filter:~$
>
> I've ordered a PCI 32 bit gigabit card to bypass the USB entirely, but I'm
> still curious if my hunch about a USB problem is correct.
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