Greetings-
I'm attempting to get CentOS 5.5 x86 (yes, very specific version required for specific software usage scenario... don't ask) running on an Intel D425KT mini-ITX motherboard. Everything works fine, with the exception of the onboard ethernet, which is a Realtek RTL8105E chip. The stock CentOS installation attempts to use the r8169 driver, which does not work. I've been around the block a few times dealing with Realtek interfaces and their driver hell, but this one is stumping me.
Things tried so far:
-Adding pci=assign-busses to the kernel parameters -Installing kmod-r8101 from elrepo, old and new versions -Compiling driver from scratch direct from Realtek
In every test, I end up with what *appears* to be a functioning ethernet interface (r8101 driver detects chip as RTL8105E correctly), or as reported by the software (ifconfig, ethtool, etc). But, I just cannot get any traffic to pass. There is a link light for the ethernet interface, but no actual activity when testing.
Any thoughts?
--Tim
On Fri, 17 Aug 2012, Tim Nelson wrote:
To: CentOS mailing list centos@centos.org From: Tim Nelson tnelson@rockbochs.com Subject: [CentOS] Intel D425KT Motherboard / Realtek RTL8105E
Greetings-
I'm attempting to get CentOS 5.5 x86 (yes, very specific version required for specific software usage scenario... don't ask) running on an Intel D425KT mini-ITX motherboard. Everything works fine, with the exception of the onboard ethernet, which is a Realtek RTL8105E chip. The stock CentOS installation attempts to use the r8169 driver, which does not work. I've been around the block a few times dealing with Realtek interfaces and their driver hell, but this one is stumping me.
Things tried so far:
-Adding pci=assign-busses to the kernel parameters -Installing kmod-r8101 from elrepo, old and new versions -Compiling driver from scratch direct from Realtek
In every test, I end up with what *appears* to be a functioning ethernet interface (r8101 driver detects chip as RTL8105E correctly), or as reported by the software (ifconfig, ethtool, etc). But, I just cannot get any traffic to pass. There is a link light for the ethernet interface, but no actual activity when testing.
Any thoughts?
Hi Tim.
If this NIC is built onto the motherboard, would it not be easier just to find an (PCI?) expansion slot NIC that is known to work out of the box on Centos 5.5 and use that instead?
HTH
Keith
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On Fri, 17 Aug 2012, Tim Nelson wrote:
To: CentOS mailing list centos@centos.org From: Tim Nelson tnelson@rockbochs.com Subject: [CentOS] Intel D425KT Motherboard / Realtek RTL8105E
Greetings-
I'm attempting to get CentOS 5.5 x86 (yes, very specific version required for specific software usage scenario... don't ask) running on an Intel D425KT mini-ITX motherboard. Everything works fine, with the exception of the onboard ethernet, which is a Realtek RTL8105E chip. The stock CentOS installation attempts to use the r8169 driver, which does not work. I've been around the block a few times dealing with Realtek interfaces and their driver hell, but this one is stumping me.
Things tried so far:
-Adding pci=assign-busses to the kernel parameters -Installing kmod-r8101 from elrepo, old and new versions -Compiling driver from scratch direct from Realtek
In every test, I end up with what *appears* to be a functioning ethernet interface (r8101 driver detects chip as RTL8105E correctly), or as reported by the software (ifconfig, ethtool, etc). But, I just cannot get any traffic to pass. There is a link light for the ethernet interface, but no actual activity when testing.
Any thoughts?
Hi Tim.
If this NIC is built onto the motherboard, would it not be easier just to find an (PCI?) expansion slot NIC that is known to work out of the box on Centos 5.5 and use that instead?
Or the other option could be to use a USB to RJ45 adaptor instead of the onboard NIC?
http://www.amazon.co.uk/USB-LAN01-Usb-lan-RJ45/dp/B000CCZP88/ref=sr_1_3?ie=U...
Keith
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On Fri, 17 Aug 2012, Keith Roberts wrote: *snip*
Or the other option could be to use a USB to RJ45 adaptor instead of the onboard NIC?
http://www.amazon.co.uk/USB-LAN01-Usb-lan-RJ45/dp/B000CCZP88/ref=sr_1_3?ie=U...
Here's an interesting article about using Ethernet over USB:
"The ability to connect Ethernet devices via USB ports is known as Ethernet over USB. There are many low-cost commercial adapters available to do this. The links below describe the technical details on how the technology works."
http://en.wikipedia.org/wiki/Ethernet_over_USB
HTH
Keith
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On Fri, 17 Aug 2012, Tim Nelson wrote:
To: CentOS mailing list centos@centos.org From: Tim Nelson tnelson@rockbochs.com Subject: Re: [CentOS] Intel D425KT Motherboard / Realtek RTL8105E
----- Original Message -----
Or the other option could be to use a USB to RJ45 adaptor instead of the onboard NIC?
Gross. Have you used any USB<->Ethernet adapters lately? I have, and they are horrible.
Hi Tim.
Nope not had any need to yet.
Why are they gross then?
Keith
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----- Original Message -----
On Fri, 17 Aug 2012, Tim Nelson wrote:
To: CentOS mailing list centos@centos.org From: Tim Nelson tnelson@rockbochs.com Subject: Re: [CentOS] Intel D425KT Motherboard / Realtek RTL8105E
----- Original Message -----
Or the other option could be to use a USB to RJ45 adaptor instead of the onboard NIC?
Gross. Have you used any USB<->Ethernet adapters lately? I have, and they are horrible.
Hi Tim.
Nope not had any need to yet.
Why are they gross then?
"Gross", as in:
-High latency -Poor throughput -Random link connects/disconnects -Random traffic slowdowns
In general, they fit the bill for 'ease of installation', but miss the mark on everything else a NIC should be.
Maybe I got a bad batch, but I've tried 4 or 5 different models, all the same results.
--Tim
On Fri, 17 Aug 2012, Tim Nelson wrote:
*snip*
"Gross", as in:
-High latency -Poor throughput -Random link connects/disconnects -Random traffic slowdowns
In general, they fit the bill for 'ease of installation', but miss the mark on everything else a NIC should be.
Maybe I got a bad batch, but I've tried 4 or 5 different models, all the same results.
As a test case, have you tried booting from a recent Live CD version of Linux, like Parted Magic:
http://partedmagic.com/doku.php?id=screenshots
It's also included on the UBCD:
http://www.ultimatebootcd.com/index.html
If you can get this onboard NIC working OK from Parted Magic, then at least you know it's not the NIC hardware.
You might find the hardware identification routines in the Parted Magic distro can give you some helpful pointers too.
HTH
Keith
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Hey, Keith,
I may have missed your answer to this - have you tried tcpdump while trying to send, once it looks good? Does ethtool ever think there's a link?
mark
----- Original Message -----
Hey, Keith,
I may have missed your answer to this - have you tried tcpdump while trying to send, once it looks good? Does ethtool ever think there's a link?
I'm the OP, and no I haven't done a capture yet. Not a bad idea, thanks! Ethtool does indeed report a link, and it shows the proper modes for the interface (10mbit full/half duplex and 100mbit full/half duplex).
--Tim
Hi,
Want to know what is the best tools to monitor network connection speed between client PC and my server. As I need to know if the network latency. I know use zabbix to monitor CPU/member and others of server. However, 1. For the connection speed monitor is there any tools can do this? 2. I tried netperf, it's good. I have to write a cron job in my client PC to report the speed? is this a correct way to do? 3. If use netperf and cron job do connection speed test every 5 mins, is that impact my server network throughput as I guess it is sending really data between server and client. Could you help to point me a right way to move on, thank you very much.
Best Regards, Su Heng
Try with smokeping if you want to know latency.
2012/8/17, suheng ste.suheng@gmail.com:
Hi,
Want to know what is the best tools to monitor network connectionspeed between client PC and my server. As I need to know if the network latency. I know use zabbix to monitor CPU/member and others of server. However, 1. For the connection speed monitor is there any tools can do this? 2. I tried netperf, it's good. I have to write a cron job in my client PC to report the speed? is this a correct way to do? 3. If use netperf and cron job do connection speed test every 5 mins, is that impact my server network throughput as I guess it is sending really data between server and client. Could you help to point me a right way to move on, thank you very much.
Best Regards, Su Heng _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
----- Original Message -----
If this NIC is built onto the motherboard, would it not be easier just to find an (PCI?) expansion slot NIC that is known to work out of the box on Centos 5.5 and use that instead?
Yes, that is what I'm doing for testing and working on the system, but given the board is mini-ITZ with a single PCI slot which will be filled later with a different card, this isn't much of a solution. :)
--Tim
Tim Nelson wrote:
Greetings-
I'm attempting to get CentOS 5.5 x86 (yes, very specific version required for specific software usage scenario... don't ask) running on an Intel D425KT mini-ITX motherboard. Everything works fine, with the exception of the onboard ethernet, which is a Realtek RTL8105E chip. The stock CentOS installation attempts to use the r8169 driver, which does not work. I've been around the block a few times dealing with Realtek interfaces and their driver hell, but this one is stumping me.
<snip> I've got a baaad feeling about this. Have you considered returning the m/b for a replacement?
mark
----- Original Message -----
Tim Nelson wrote:
Greetings-
I'm attempting to get CentOS 5.5 x86 (yes, very specific version required for specific software usage scenario... don't ask) running on an Intel D425KT mini-ITX motherboard. Everything works fine, with the exception of the onboard ethernet, which is a Realtek RTL8105E chip. The stock CentOS installation attempts to use the r8169 driver, which does not work. I've been around the block a few times dealing with Realtek interfaces and their driver hell, but this one is stumping me.
<snip> I've got a baaad feeling about this. Have you considered returning the m/b for a replacement?
Yes, it crossed my mind, but the fact is I have 4 of these boards, all with the same symptoms. :(
--Tim
Just to be sure, have you tested on the machine to ping the interface? i.e. give it an IP address in ifcfg-eth0, then ping the ip address locally?
Did you put another "temporary" PCI card into the system and tried that?
Jobst
On Fri, Aug 17, 2012 at 12:59:11PM -0500, Tim Nelson (tnelson@rockbochs.com) wrote:
----- Original Message -----
Tim Nelson wrote:
Greetings-
I'm attempting to get CentOS 5.5 x86 (yes, very specific version required for specific software usage scenario... don't ask) running on an Intel D425KT mini-ITX motherboard. Everything works fine, with the exception of the onboard ethernet, which is a Realtek RTL8105E chip. The stock CentOS installation attempts to use the r8169 driver, which does not work. I've been around the block a few times dealing with Realtek interfaces and their driver hell, but this one is stumping me.
<snip> I've got a baaad feeling about this. Have you considered returning the m/b for a replacement?
Yes, it crossed my mind, but the fact is I have 4 of these boards, all with the same symptoms. :(
--Tim _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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Diego Sanchez -
Jobst Schmalenbach -
Keith Roberts -
m.roth＠5-cent.us -
suheng -
Tim Nelson