I use MTR to do some of that testing. It is kind of like traceroute but gives a lot more info. When I moved to Oklahoma City, I got ATT internet (the other option was Cox) they brought out a modem and set it up. I tried to use the network, but it was very slow to resolve, once resolved it was blazing fast. I used mtr to look at their DNS (the DNS was hardwired in the modem). At that time the DNS was down in Austin TX. It was 8 hops down there, about the 4th hop down there was a router that showed about 75% loss. Also had a lot of jitter.
At least I knew that the issue was not on my end. On Wed, Apr 15, 2020 at 7:50 PM Mike C. <[email protected]> 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. > > -- 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 <[email protected]> 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@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@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. > > _______________________________________________ > > PLUG mailing list > > [email protected] > > http://lists.pdxlinux.org/mailman/listinfo/plug > > > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > -- Chuck Hast -- KP4DJT -- I can do all things through Christ which strengtheneth me. Ph 4:13 KJV Todo lo puedo en Cristo que me fortalece. Fil 4:13 RVR1960 _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
