On Tue, May 30, 2017 at 6:10 PM, Lew Wolfgang <wolfgang@sweet-haven.com> wrote:
On 05/30/2017 11:22 AM, Greg Freemyer wrote:
I happened to look at netstat -in with a large SMB upload ongoing and was surprised to see dropped packets.
I'm on the client that is uploading the data to a Windows fileserver.
They are on receive side which should not have much data in the packets at all. Just ACKs for the data being uploaded:
netstat -in; sleep 120; netstat -in
Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth0 1500 0 1446805 0 105154 0 10527829 0 0 0 BMRU lo 65536 0 69 0 0 0 69 0 0 0 LRU
Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth0 1500 0 1759965 0 105198 0 13887199 0 0 0 BMRU lo 65536 0 69 0 0 0 69 0 0 0 LRU
If you look at the delta over those 2 minutes, it's 44 dropped RX packets out of a little over 300,000 overall received packets.
It's not outrageous, but it caught me off-guard. And I don't often look at the number of dropped packets.
The machines are just a few feet apart and connected to the same 1Gbit switch.
Hi Greg,
That seems a bit high to me too. Do you have another switch to drop into place as a test? Maybe try some different cables too? You might be able to eliminate the switch entirely if your NIC's auto sense. That, or try a cross-over cable?
Regards, Lew
There are 4 computers on the switch and an uplink headed to the Internet connected router in the closet. So bypassing the switch isn't going to fly. Or at least not for long. I likely have a spare switch I could grab, and plenty of cables. I just didn't want to start troubleshooting a non-existent problem. Thanks Greg -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org