Intermittent wired network drops with Realtek NIC

Running Arch x86_64. The NIC in question is the Realtek 8110SC, which utilizes the r8169 module. After a few minutes (or seconds sometimes) the network interface drops entirely. I can only ping localhost, but all other indications suggest the connection is just fine. There is nothing of note in dmesg or /var/log/*
This error does not occur with any other OS, nor any other *nix distro that I have tested.

Hi, are there any other peripherals using the RJ45 ports on the router?
Are you using a static IP address for the 8600?
Please mark the post that solves your issue as "Accept as Solution".
If my answer was helpful click the “Thumbs Up" on the left to say “Thanks”!
I am not a HP employee.

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Intermittent wired network connection on HP OfficeJet Pro 8600

I've searched the forums and I haven't seen a problem/solution quite like I am experiencing, so I am starting a new thread.
I have a HP OfficeJet Pro 8600 that will only keep an intermittent connection to my router. Lately, it has been more often not than connected. I usually have to disconnect and connect the Ethernet cable to the back of the printer several times before it will show a connection, and then, only for a little while before it drops the connection again. When connected, everything works fine (printing, faxing, scanning).
When the printer is disconnected, the network status has a yield sign with an exclamation point inside. There are no blinking lights on the back where the network cable connects. When it connects (by me plugging and unplugging), the lights start flickering. I've tried several cables including known good ones to rule that possibility out. Cycling the power has no consistent affect. The router is otherwise working fine.
Here are other details that might help:
Model: HP OfficeJet Pro 8600 (N911a)
Firmware: up-to-date
Software drivers: up-to-date
Router: CISCO E3200
Connection: wired network
Static IP address reserved (not connecting with DHCP)
MAC filtering off
Main Computer: Windows 7 Service Pack 1
Wired Connection to the router
Can someone suggest a solution? My best guess is that the network card in the printer is bad, but I am willing to try an easier solution. Thanks.

Hi, are there any other peripherals using the RJ45 ports on the router?
Are you using a static IP address for the 8600?
Please mark the post that solves your issue as "Accept as Solution".
If my answer was helpful click the “Thumbs Up" on the left to say “Thanks”!
I am not a HP employee.

Network dropping with WRT54GS

The network drops 3-4 times daily. Got this router, as an upgrade from the B, about 2 months ago.
The only way to get the network back is to unplug all cables, pull the power, let it reset, then do a repair on the Local area Connection.
I am securing it with a WEP key, it has a SSID, other than that if you can help me I can give more information.
It drops for all three computers on the network. The desktop is physically connected, and the two laptops are wirelessly connected.
Please help this extremely frustrating.
Dwayne
EDIT --> it's version 6
Message Edited by dwharmsway on 05-29-200710:16 AM

I'm having the same problem on my end.
This has been a problem with Linksys routers for some years now. First one I had back in 2002/2003 had the same problems and they never were resolved.
It shocks me that they still suffer from this. I have not used routers for the last 3 years and when I decided to get one I went for Linksys because I like their interfaces. I figured they had fixed that problem from back then.
Seems they haven't as I have to unplug my cables at random intervals for the network to work again.
It just dies without any warning, kills the internet connection and the network in general.
Seems I will have to return this junk and get myself another kind of wireless router. I am using version 6 of it btw.
Any suggestions that won't ruin me?
Message Edited by jobs on 05-31-200706:50 AM
Message Edited by jobs on 05-31-200706:50 AM

Very slow network performance with Intel NIC when TCP Large Send Offload is enabled

I have a Windows 2008 server with two NIC's (Intel PRO/1000 PL and Intel PRO/1000 PM), and one virtual external switch connected to each NIC.
With the 01/14/08 network driver, I get very low throughput on both NIC's (~10KB/sec when downloading from my server when it should be around 11MB/sec).
I've found that disabling "TCP Large Send Offload (IPv4)" on the virtual switch and "Large Send Offload v2 (IPv4)" on the physical adapters solves the problem.
Is this a bug in the driver?
Thank you,
Ricardo Costa

2 years later, I was able to get that machine to work with Hyper-V under Windows Server 2008 R2, but only after disabling everything that had anything to do with TCP or IP offloading. I think that I had to turn off 4 settings on one controller,
and 5 settings on the other controller. Once that was done, everything worked flawlessly. It is very apparent that the Virtual Controllers do not properly use many of the features of non-Intel devices (not all Intel devices work either), and
that Hyper-V does not completely uninstall if you remove it.
If you have any problems, start turning off the features that your adapter supports, until it starts working. You'll need to weight the cost of replacing the controller with a fully supported controller, of which there is no list, or using your existing
controller at a capacity lower than it physically supports. This has been an elusive issue with Microsoft's Virtual Server projects since they were first in beta, so don't expect a fix anytime soon.
P.S. For those who don't know, the settings are on the actual device and can be changed in the Device Manager. If you are still having trouble after turning off all the settings, then you will need to replace the controller(s) with a different
make/model.
Bill Bosacker's Blog @ http://www.openSourceC.org/

[SOLVED] Can't get network to work (realtek NIC)

Hi there!
I found Arch a couple of weeks ago and I got pretty excited with the possibility of taking my old Athlon 750MHz out of inactivity.
Unfortunately, I can't seem to get the network to work.
* I installed the system using Archlinux-i686-2007.08-2.core.iso
* I have a little router and the machine has static IP
lspci:
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
rc.conf:
MOD_AUTOLOAD="yes"
MOD_BLACKLIST=()
MODULES=(8139cp 8139too mii slhc)
USELVM="no"
HOSTNAME="hige"
lo="lo 127.0.0.1"
eth0="eth0 192.168.2.103 netmask 255.255.255.0 broadcast 192.168.2.255"
INTERFACES=(lo eth0)
gateway="default gw 192.168.2.61"
ROUTES=(gateway)
DAEMONS=(syslog-ng network netfs crond)
I think I got the configuration right, however, I have no eth0 (i.e., ifconfig -a only gives 'lo')
Not sure if it's relevant, but here's something I found interesting in dmesg:
8139cp: 10/100 PCI Ethernet driver v1.3 (Mar 22, 2004)
8139cp 0000:00:0a.0: This (id 10ec:8139 rev 10) is not an 8139C+ compatible chip
8139cp 0000:00:0a.0: Try the "8139too" driver instead.
8139too Fast Ethernet driver 0.9.28
ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 10
PCI: setting IRQ 10 as level-triggered
ACPI: PCI Interrupt 0000:00:0a.0[A] -> Link [LNKC] -> GSI 10 (level, low) -> IRQ 10
PCI: Unable to reserve I/O region #1:100@de00 for device 0000:00:0a.0
Trying to free nonexistent resource <000000000000de00-000000000000deff>
Trying to free nonexistent resource <00000000efffff00-00000000efffffff>
8139too: probe of 0000:00:0a.0 failed with error -16
And here's a dmesg of an old gentoo instalation that I had in the same computer, but with an old, damaged HDD:
Intel(R) PRO/1000 Network Driver - version 7.3.20-k2
Copyright (c) 1999-2006 Intel Corporation.
e100: Intel(R) PRO/100 Network Driver, 3.5.23-k4-NAPI
e100: Copyright(c) 1999-2006 Intel Corporation
forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.60.
8139cp: 10/100 PCI Ethernet driver v1.3 (Mar 22, 2004)
8139cp 0000:00:0a.0: This (id 10ec:8139 rev 10) is not an 8139C+ compatible chip
8139cp 0000:00:0a.0: Try the "8139too" driver instead.
8139too Fast Ethernet driver 0.9.28
AMD756: dev 10ec:8139, router pirq : 3 get irq : 10
PCI: setting IRQ 10 as level-triggered
PCI: Found IRQ 10 for device 0000:00:0a.0
eth0: RealTek RTL8139 at 0xc8800f00, 00:e0:4d:84:1b:55, IRQ 10
eth0: Identified 8139 chip type 'RTL-8100B/8139D'
Am I doing something wrong?
Any advice would be greatly appreciated!
edit: changed the subject to [solved]
Last edited by jorgenmz (2008-04-16 22:39:48)

The kernel module for
Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
is 8139too I think
So /etc/rc.conf should be like this
# HARDWARE
# Scan hardware and load required modules at bootup
MOD_AUTOLOAD="yes"
# Module Blacklist - modules in this list will never be loaded by udev
MOD_BLACKLIST=()
# Modules to load at boot-up (in this order)
# - prefix a module with a ! to blacklist it
MODULES=( 8139too forcedeth sk98lin slhc ac97_bus snd-mixer-oss snd-pcm-oss snd-seq-oss snd-seq-device snd-seq-midi-event snd-seq snd-hwdep snd-$
# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"
The first one is 8139too, so it will be eth0
In my example the second one is forcedeth for nvidia ethernet controler, so its going to be eth1
Don't forget to edit /etc/resolv.conf

Intermittent wired network connection on OS 10.3.9. Help!

Hi,
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The router is setup using DHCP. The two computers connected via Wi Fi have virtually no problems. However, ironically, the G4 tower, that is connected via an ethernet cable, is constantly losing it's internet connection. It's very weird (For what it's worth, up until January, this same computer was connected directly to a DSL modem at a different location via ethernet, and had no connectivity problems, ever...) When you bring up a browser - Firefox, Camino, Safari - it will work for a minute or two, then suddently if you try to go to another page it will say "Waiting for..." And you wait, and wait. If you try to go to another location it will say "Looking up...", as if it's completely lost it's DNS capability, which it seems it has. However, if you wait a few minutes it comes back. But with annoying regularity it will die again, then you have to wait 1 - 5 minutes for it to come back. Going to Network and clicking "Renew DHCL Lease" doesn't seem to bring it back any faster than just waiting. I've also tried different ports on the router. Whenever it loses it's connection, if I go to the Network settings area, it will display a green light and say "Connected to the internet via Ethernet". So the physical connection still seems to be there.
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Hi,
   Thanks for the response. Yes, I did install a brand new ethernet cable. I also tried shutting down our other two wired computers so the wired G4 was the only computer on the network. Still no luck. I also tried reserving an IP within the DHCP range just for the wired G4, and setting the Network Preferences to Static IP w/ DHCP. Still no luck. I'm starting to think it's just a piece of crap router and I should just try a new one. It doesn't really make any sense, because it's not rocket science. And the wireless computers work perfectly...
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Using Linksys WRT54G as a wired network extender with Time Capsule

I have been using the WRT54G as my primary home router with an Airport Express attached to it via Ethernet cable at the opposite end of the house to extend my network. I have recently purchased a Time Capsule, which I plan to make my primary router, and I would like to use the Linksys as the extender and free up the AE to take to my office for music streaming. Is this a doable solution, and is the Linksys difficult to set up for this purpose? The AE currently uses the same network name and password as the Linksys and is a seamless extension of my network. I'd like for the new configuration to be just as seamless.

Welcome to the discussions, Hookshot!
I would like to use the Linksys as the extender
That is doable if you connect the Linksys to the Time Capsule using the ethernet cable and configure the Linksys in "bridge mode" to use the exact same wireless network name, security settings and password as the Time Capsule network.
and is the Linksys difficult to set up for this purpose?
You might want to post on the Linksys forum for that question as we would not have that type of specific info on the Time Capsule forum.
and free up the AE to take to my office for music streaming
The Express would be configured to "join" a wireless network for this. The Express will pick up the strongest signal from either the Time Capsule or Linksys, depending on where they are located in relation to each other.
I'd like for the new configuration to be just as seamless.
It will be if you use the exact same wireless network name, security and password on the Time Capsule and Linksys devices.

HT4623 Intermittent cellular network drops then phone5 hangs becomes not reachable started after upgrade to iOS7

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HT2421 If I attach a hard drive to the USB port, can I access it from the wired network, while simultaneously creating a separate wifi network with NO access to the hard drive?

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Bonzo...

Several things to consider.
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I understand I can set the home folders to shared, but a few problems present:
1. This seems to establish wireless sharing, whereas we need a wired-only network.
2. I understand how to share between accounts on a single computer, say, accounts A and B on computer X. But how to add permissions for accounts on other computers (e.g. account Y on computer Z)?

Yep, I realize that, and it's where I'm stuck at. I'm only seeing two possibilities, neither of which is helpful...
A. allow permissions for "Users & Groups" on the same computer, which ignores the goal of networking users from other computers.
B. allow "Everyone" with a wireless connection, which ignores the goal of creating a network between only the office computers.
So the Receptionist computer wants to allow access to users from the Front Office computer, Technicians computer, and Back Office computer. Back office wants to allow users from the Technicians computer, Front Office computer, and so forth.
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Setting up wifi for ipad with an existing hard wired network

Greets all.
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Thank you! Thank you! Awesome! I've been trying to find an explanation for this is laymen's terms (I'm new to Mac and wi-fi networks) and this answered my question exactly. I have an iMac I want to keep its wired connection, and the iPad to run off wi-fi. Sounds like the Airport Extreme is the way to go, but I only say that because it's an Apple product.
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Cannot log into T61 from remote computer with wired network and Windows Explorer.

Hi,
I am using a T61 7662-cto with Windows 7 Professional
When the T61 is connected on the home network with the wired network, I am not able to log into it remotely from another computer. On my second computer, I see the T61 with Windows Explorer but instead of getting the login window, it appears a Network Error with the message:
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When the T61 is wireless connected, there is no problem. I can access it from my second computer.
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http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-73611
Do you have a hint for this issue why the wired network gives problem?
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Under '''Advanced,''' Select '''General.'''
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Poke around safe web sites. Are there any problems?
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ACS 5.4 with DACL over wireless and wired network

Hi my name is Ivan, I have a question
I have a deployment in my network wired at this way:
Profile 1: corporate's users are working with 802.1X to authenticate computers and users with eap peap mschap v2 and Mac Filtering configuring in the Cisco WLC. My ACS 5.4 is integrate to the Active Directory.
Profile 2: Telephonies IP authenticate with MAB. All the Mac Address are registered in to the ACS locally.
Profile 3: user guest authenticate with portal web from Cisco Wireless Lan Controller over the wired network, and the account exist in to the WLC Lobby Ambassador
A my deployment in the wireless network is in this way:
Flex Connect with central authentication and local switching to connect 15 sites over the wan network.
SSID 1: users corporate working with 802.1X to authenticate users with peap mschap v2 and Mac Filtering configuring in the Cisco WLC. My ACS 5.4 is integrate to Active Directory.
SSID 2: users guest working with portal web from Cisco Wireless Lan Controller over the wireless network, and the account exist in to the WLC Lobby Ambassador.
I would like to configure in the Cisco ACS 5.4 Downloadable Access List (DACL) to use in my network wired and wireless.
How can I do it to my scenary?
Please could you help me?
Regards
Ivan.

Hello. To avoid confusion, let's divide the WLC based upon the operating system.
There are WLCs who run AirOS. That includes WLC 4400, but also includes WLC 5500.
There are WLCs who run IOS-XE. That includes the new Catalyst 3850-X and WLC 5700. (also I think can run AirOS too).
IOS-XE fully support DACL. On the other hand AirOS support DACL partially.
From ACS point of view, when you configure DACL for IOS you configure not only the name of the access-list, but also the access-list entries. That way the IOS devices don't need to have the ACLs pre-configured. This is great because you only need to create and update the access-list entries from only one place (which is ACS) and deploy easily to hundreds of switches.
On the other hand, when ACS configures DACL for AirOS it can only specify the name of the access-list. The AirOS device needs to configure the access-list with a name exactly as configured on the ACS. Sadly, each AirOS device also needs to configure all acess-list entries.
It seems you want to configure DACL along with other attributes. If you explain me a little more your requirement I can show you what to configure.
Best regards

Any help with Linkskys PrintServer PSUS4, G4 and HP1200 in a wired network?

Wired the house with cat 6e wire. Verizon FIOS is working great on a network of Mac G4 Powerbook; Mac G4 PowerPC and two PC's.
Hooked in a Linksky's PrentServer to the network - the Mac won't recognize the HP 1200 printer.
What settings should I be putting on the Mac --- ?????
any help appreciated.

Hello Cal87,
Please correct me if I have misunderstanding:
1. You use static IP address to connect Windows 7 to Mac Mini
2. You can access Mac by typing file://ipaddress in Windows explorer
3. You try to click the Mac in Windows network, and you will get the error message ‘Windows cannot access
\\computername error code: 0x80070035 The network path was not found.’
Please take the following steps for troubleshooting:
1. Check if we can ping the computer name of the Mac Mini
2. Temporarily disable security software and firewall in case incorrect settings might block the connection.
Best regards,
Fangzhou CHEN
Fangzhou CHEN
TechNet Community Support

I have attempted to update my software over 10 times but I get a network connection error. Anyone with the same problem? Got it on the wireless and wired network.

I have attempted to update my software over 10 times but I get a network connection error. Anyone with the same problem? Got it on the wireless and wired network.

Disable all Firewalls & Anti-Virus software...try again.

Intermittent wired network drops with Realtek NIC

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