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Re: Network Performance Degrading over random amount of time


On Sun, Apr 20, 2014 at 1:01 PM,  <h@xx0r.eu> wrote:
> Hi List,
> maybe you have a clue about the issues im having since several months.
> My Homeserver is running Debian Jessy right now, the network issues where
> there with wheezy aswell.
> after a fresh boot my network behaves like it should archiving near gbit
> speeds which is nice, after a random amount of uptime though my throughput
> degrades below 100mbit network speeds (about ~3.5MB/s)
> i measured using iperf.
> Current Hardware:
> - Asus P8H67-M PRO
> - Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz
> - 16 GB DDR3 Ram (2*8GB Kingston ram)
> - Intel Corporation 82541PI Gigabit Ethernet Controller
> - TP-Link 8-Port gbit switches (2 of em between home-server and clients)
> Ive tried diffrent things so far:
> - Switched from a switched cabling setup to Crosslink.
> - Swapped out the cheap asrock motherboard with asus
> - Changed from onboard realtek network chip to PCI Intel Gbit card
> - Reinstalled OS several times
> - Testing from diffrent clients (Win 7, Linux Mint, Debian, Ubuntu)
> - Downloading vendor drivers and using them instead of the kernel inbuild
> ones
> Nothing so far had worked to get my gbit speeds stable over a few days.
> im open to ANY suggestions here even if they involve building a custom
> kernel or other magical hakkery ;D

Can you post iperf params which you are using and the iperf output ?
What says iperf when used with UDP? What says ethtool -i ethx?


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