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O.S : Fedora 32 Kernel Version : 5.6.14-300.fc32.x86_64

I've had an Onboard NIC I can't get my total ISP speed Provider that is 600MB, some month ago this work for me:

I've made a speed test:

https://www.speedtest.net/

What I obtain : 230 more or less on both up and down....

I call to ISP and sent a tech. and in a Laptop with windows they verified the speed was 600mb

I said uhmmm. my OnBoard NIC is gone so I decide to buy Another One:

TP-LINK TG-3269 Gigabit PCI Network Adapter and Add it to a PCI SLOT

Same Result, I didn't get the result what I looking for:

Here is some terminal Output:

lspci 02:06.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller (rev 10) sudo lspci -v 02:06.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller (rev 10) Subsystem: Realtek Semiconductor Co., Ltd. RTL8169/8110 Family PCI Gigabit Ethernet NIC Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 20, NUMA node 0 I/O ports at de00 [size=256] Memory at fdeff000 (32-bit, non-prefetchable) [size=256] Expansion ROM at fdf00000 [virtual] [disabled] [size=128K] Capabilities: [dc] Power Management version 2 Kernel driver in use: r8169 Kernel modules: r8169 sudo mii-tool enp2s6 enp2s6: negotiated 1000baseT-HD flow-control, link ok sudo mii-tool -v enp2s6 enp2s6: negotiated 1000baseT-HD flow-control, link ok product info: vendor 00:07:32, model 17 rev 3 basic mode: autonegotiation enabled basic status: autonegotiation complete, link ok capabilities: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD advertising: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control link partner: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control ethtool -S enp2s6 NIC statistics: tx_packets: 678698 rx_packets: 1674292 tx_errors: 0 rx_errors: 0 rx_missed: 1352 align_errors: 0 tx_single_collisions: 0 tx_multi_collisions: 0 unicast: 1673746 broadcast: 546 multicast: 0 tx_aborted: 0 tx_underrun: 0 bat /sys/class/net/enp2s6/speed 1 │ 1000 bat /sys/class/net/enp2s6/duplex 1 │ full ip add show 2: enp2s6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 60:e3:27:04:42:17 brd ff:ff:ff:ff:ff:ff inet 192.168.0.155/24 brd 192.168.0.255 scope global dynamic noprefixroute enp2s6 valid_lft 80510sec preferred_lft 80510sec inet6 fe80::a431:45ad:da43:453/64 scope link noprefixroute valid_lft forever preferred_lft forever sudo ethtool enp2s6 Settings for enp2s6: Port: MII PHYAD: 0 Transceiver: external Supports Wake-on: pumbg Wake-on: d Current message level: 0x00000033 (51) drv probe ifdown ifup Link detected: yes

I'm out of ideas.....

  1. Where is all the rest of bits?
  2. Is my machine?
  3. What is happening here?

Regards., and Thx in advanced...

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1 Answer 1

Reset to default
1 
cat /sys/class/net/enp2s6/duplex 1 │ full

According to that you have a full duplex link, then 1000baseT-HD is an issue with what mii-tool shows.

rx_missed: 1352

This seems to explain the issue you're facing, the missed rx packets cause re-transmissions. Maybe your system is slow. You could try to enable rx interrupt coalescing, e.g.

ethtool -C enp2s6 rx-usecs 200
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  • I've follow your sugestion but I've got -> Cannot set device coalesce parameters: Invalid argument Commented May 26, 2020 at 14:16
  • 200 may be too big on an ancient RTL8169, try 100 instead. Commented May 26, 2020 at 21:15
  • works but doesn't help too much Commented May 27, 2020 at 17:29
  • OK. In case you added the PCI card to a slot behind a PCIe to PCI bridge: There have been problems caused by buggy ASM1083 chips. It would be worth checking whether you have such a chip on your board. In general I'd recommend to go with a more recent PCIe card (if possible with your board). Commented May 28, 2020 at 8:37

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