Top Forums UNIX for Beginners Questions & Answers 10gbe ixgbe slow at 420mbyte/s max, p2p lan cat8 1m, tried ethtool and ifconfig options to no avail Post 303045712 by tinfoil3d on Friday 10th of April 2020 08:12:57 AM
Old 04-10-2020
Hey stomp,
both sides show valid full 10gig, full duplex, I checked that first thing. As stated, txq and mtu match. Raising them to 10000 and 9000 respectively increased speed from 393 to 415 but not any further.
Swapped ports, tried flight-proven cat7 cable: no change.

iperf reports same speed as wget from nginx, apache, even busybox.
The interesting note is when dling to epyc (newer) box it shows 421mbyte/s, downloading to i7 from epyc it shows 415mbyte/s max. I don't know if that may suggest you anything.

also, updating post with more details:
ethtool info for interfaces differs slightly but i'm pretty sure it doesn't matter: you can just see the diff.

this is for i7: https : // paste. ubuntu. com/p/JmDQcYWkbs/
this is epyc: https : / / paste ubuntu .com/p/ZThRF6kcqs/
and this is diff(embedded):
# diff i7 epyc 
< Cannot get device udp-fragmentation-offload settings: Operation not supported
< Features for eth101:
> Features for eth1:
<     tx-checksum-fcoe-crc: off
>     tx-checksum-fcoe-crc: on
< tx-fcoe-segmentation: off
> tx-fcoe-segmentation: on

and ethtool -g for both boxes match:
Ring parameters for eth1:
Pre-set maximums:
RX:        4096
RX Mini:    0
RX Jumbo:    0
TX:        4096
Current hardware settings:
RX:        4096
RX Mini:    0
RX Jumbo:    0
TX:        4096


9 More Discussions You Might Find Interesting

1. Solaris

How to configure private LAN and coporate LAN on the same machine-Solaris10

Hi , I am trying to configure a private LAN and corporate LAN on the same machien on Solaris 10. How can I achieve this? Thanks (1 Reply)
Discussion started by: deedee
1 Replies

2. Shell Programming and Scripting

ethtool : command not found

Hi, I am uising Suse linux on my system and i tried : man ethtool and i got the manual for ethtool but when i tried to use the command as: ethtool -a eth0 it says Command not found. also, i tried rpm -qa|grep ethtool i got: ethtool-3-15.2 so,it means my system has ethtool server or... (4 Replies)
Discussion started by: salil2012
4 Replies

3. Programming

ethtool problem

Hi, I'm using ethtool to change network settings: Just for the experiment, i want to change speed to 10, instead of 100, I type: ethtool -s eth0 speed 10 duplex full autoneg off and to view settings i type: ethtool eth0, and get this: Settings for eth0: Supported ports: ... (4 Replies)
Discussion started by: alex889
4 Replies

4. IP Networking

Slow LAN FTP Transfers with FreeBSD...

Hello, I've got a FreeBSD 6 server running on my network that I used as a file server for my main computer. However I've really become frustrated with the slow up/down speeds I'm getting, about 100KB/s, which is about as bad as if I was using a "real" server. My setup is as follows: ISP |... (4 Replies)
Discussion started by: CyberCat
4 Replies

5. IP Networking

Local Lan, no-ip directed DNS forward, surf within lan

Hi, We have a website running on a local centos 5.4 surfer, static IP. The uses to take care of the DNS, it forwards all to my server. My router receives the port 80 call, routes it to my server and the world can see perfectly fine. However, we cannot see... (3 Replies)
Discussion started by: lawstudent
3 Replies

6. Shell Programming and Scripting

cut, sed, awk too slow to retrieve line - other options?

Hi, I have a script that, basically, has two input files of this type: file1 key1=value1_1_1 key2=value1_2_1 key4=value1_4_1 ... file2 key2=value2_2_1 key2=value2_2_2 key3=value2_3_1 key4=value2_4_1 ... My files are 10k lines big each (approx). The keys are strings that don't... (7 Replies)
Discussion started by: fzd
7 Replies

7. Red Hat

Ethtool script not running on boot.

Hi, there is an incompatibility between my NIC and my Western Digital Powerline adapters which appears to cause autonegotiation to fail intermittently, most often following a reboot. Running the following Ethtool script will establish a connection immediately: #!/bin/sh # chkconfig: 345 85... (12 Replies)
Discussion started by: torley
12 Replies

8. UNIX and Linux Applications

VSFTPD slow download outside of LAN

Hello all. I have VSFTP up and ruining on ubuntu 10.04. It works great inside LAN, however when it comes to using it outside i have some problems. If i try to connect from filezila i get the listing and if i try to download it shows it will take forever to receive a file which is larger then 1mb,... (2 Replies)
Discussion started by: mantas1
2 Replies

9. UNIX for Beginners Questions & Answers

Ethtool command not working

Hi All, I am trying to find my NIC card speed in centos 5. But i am unable to get the info using ethtool command. # ethtool eth0 Settings for eth0: Link detected: yes and even tried to look for the file # cd /sys/class/net/eth0/speed files which is also not available.... (8 Replies)
Discussion started by: sravani25
8 Replies
IXG(4)							   BSD Kernel Interfaces Manual 						    IXG(4)

ixg -- Intel(R) 10Gb Ethernet driver SYNOPSIS
ixg* at pci? dev ? function ? DESCRIPTION
The ixg driver provides support for PCI 10Gb Ethernet adapters based on the Intel(R) 82598EB and 82599 10 GbE Controllers. The driver sup- ports Jumbo Frames, TCP Segmentation Offload (TSO). For questions related to hardware requirements, refer to the documentation supplied with your Intel 10GbE adapter. All hardware requirements listed apply to use with NetBSD. Support for Jumbo Frames is provided via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility configures the adapter to receive and transmit Jumbo Frames. On NetBSD, the maximum MTU size for Jumbo Frames is 9000 bytes. This driver version supports VLANs. For information on enabling VLANs, see ifconfig(8). HARDWARE
The ixg driver supports the following cards: o Intel(R) 10 Gigabit XF SR/AF Dual Port Server Adapter o Intel(R) 10 Gigabit XF SR/LR Server Adapter o Intel(R) 82598EB 10 Gigabit AF Network Connection o Intel(R) 82598EB 10 Gigabit AT CX4 Network Connection DIAGNOSTICS
ixg%d: Unable to allocate bus resource: memory A fatal initialization error has occurred. ixg%d: Unable to allocate bus resource: interrupt A fatal initialization error has occurred. ixg%d: watchdog timeout -- resetting The device has stopped responding to the network, or there is a problem with the network connection (cable). SUPPORT
For general information and support, go to the Intel support website at: SEE ALSO
arp(4), netintro(4), vlan(4), ifconfig(8) HISTORY
The ixg device driver comes from FreeBSD, where it is called ixgbe(4). It first appeared in NetBSD 6.0. AUTHORS
The ixg driver was written by Intel Corporation <>. It was imported from FreeBSD into NetBSD by David Young <>. BUGS
The hardware supports a maximum MTU of 16114 bytes, but the NetBSD port of the driver supports only 9000 bytes. The hardware supports Message-Signalled Interrupts (MSI and MSI-X) and Receive-Side Scaling (RSS), however, these features are not enabled in the NetBSD driver at this time. BSD
July 25, 2011 BSD

Featured Tech Videos

All times are GMT -4. The time now is 10:04 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy