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Old 06-10-2014, 04:02 AM   #1
Westeros
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Registered: Mar 2014
Posts: 2

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Network intermittent disconnect problem


I have been stuck at this problem for a number of days, and running out all the possibilities I can think and all the internet resources I googled. I do hope I can see a miracle from this forum helps me settle this issue.

I am within a medium size corporate and running this DELL precision T6710 on linux debian wheezy. The problem is the network is intermittent disconnected somehow with no reason I can think about. The connected and disconnected time is totally random, from a few minutes to several hours. Typically I use ssh to connect from other machines. Sometime a session can last overnight, but sometime only a few minutes. When lost connection, it also depends on the its mood, I may not able to connect to it just a few minutes or a few hours. This is the phenomenon, now I give the detailed information.

First of all, I am running linux debian, `uname -a` outputs:
Quote:
Linux ARI4-server 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3+deb7u1 x86_64 GNU/Linux
lspci outputs:
Quote:
00:00.0 Host bridge: Intel Corporation Ivytown DMI2 (rev 04)
00:01.0 PCI bridge: Intel Corporation Device 0e02 (rev 04)
00:01.1 PCI bridge: Intel Corporation Device 0e03 (rev 04)
00:02.0 PCI bridge: Intel Corporation Ivytown PCI Express Root Port 2a (rev 04)
00:03.0 PCI bridge: Intel Corporation Ivytown PCI Express Root Port 3a (rev 04)
00:05.0 System peripheral: Intel Corporation Ivytown VTd/Memory Map/Misc (rev 04)
00:05.2 System peripheral: Intel Corporation Ivytown IIO RAS (rev 04)
00:05.4 PIC: Intel Corporation Ivytown IOAPIC (rev 04)
00:11.0 PCI bridge: Intel Corporation C600/X79 series chipset PCI Express Virtual Root Port (rev 06)
00:16.0 Communication controller: Intel Corporation C600/X79 series chipset MEI Controller #1 (rev 05)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 06)
00:1a.0 USB controller: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #2 (rev 06)
00:1b.0 Audio device: Intel Corporation C600/X79 series chipset High Definition Audio Controller (rev 06)
00:1c.0 PCI bridge: Intel Corporation C600/X79 series chipset PCI Express Root Port 3 (rev b6)
00:1c.1 PCI bridge: Intel Corporation C600/X79 series chipset PCI Express Root Port 2 (rev b6)
00:1d.0 USB controller: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #1 (rev 06)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a6)
00:1f.0 ISA bridge: Intel Corporation C600/X79 series chipset LPC Controller (rev 06)
00:1f.2 SATA controller: Intel Corporation C600/X79 series chipset 6-Port SATA AHCI Controller (rev 06)
00:1f.3 SMBus: Intel Corporation C600/X79 series chipset SMBus Host Controller (rev 06)
01:00.0 Serial Attached SCSI controller: LSI Logic / Symbios Logic SAS2308 PCI-Express Fusion-MPT SAS-2 (rev 05)
03:00.0 VGA compatible controller: NVIDIA Corporation GK107 [Quadro K600] (rev a1)
03:00.1 Audio device: NVIDIA Corporation Device 0e1b (rev a1)
06:00.0 USB controller: Renesas Technology Corp. uPD720201 USB 3.0 Host Controller (rev 03)
07:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03)
7f:08.0 System peripheral: Intel Corporation Ivytown QPI Link 0 (rev 04)
7f:09.0 System peripheral: Intel Corporation Ivytown QPI Link 1 (rev 04)
7f:0a.0 System peripheral: Intel Corporation Ivytown Power Control Unit 0 (rev 04)
7f:0a.1 System peripheral: Intel Corporation Ivytown Power Control Unit 1 (rev 04)
7f:0a.2 System peripheral: Intel Corporation Ivytown Power Control Unit 2 (rev 04)
7f:0a.3 System peripheral: Intel Corporation Ivytown Power Control Unit 3 (rev 04)
7f:0b.0 System peripheral: Intel Corporation Ivytown Semaphore and Scratchpad Configuration Registers (rev 04)
7f:0b.3 System peripheral: Intel Corporation Ivytown Semaphore and Scratchpad Configuration Registers (rev 04)
7f:0c.0 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0c.1 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0c.2 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0c.3 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0c.4 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0d.0 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0d.1 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0d.2 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0d.3 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0d.4 System peripheral: Intel Corporation Ivytown Unicast Registers (rev 04)
7f:0e.0 System peripheral: Intel Corporation Ivytown Home Agent 0 (rev 04)
7f:0e.1 Performance counters: Intel Corporation Ivytown Home Agent 0 (rev 04)
7f:0f.0 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 0 Target Address/Thermal Registers (rev 04)
7f:0f.1 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 0 RAS Registers (rev 04)
7f:0f.2 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 0 Channel Target Address Decoder Registers (rev 04)
7f:0f.3 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 0 Channel Target Address Decoder Registers (rev 04)
7f:0f.4 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 0 Channel Target Address Decoder Registers (rev 04)
7f:0f.5 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 0 Channel Target Address Decoder Registers (rev 04)
7f:10.0 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 1 Channel 0-3 Thermal Control 0 (rev 04)
7f:10.1 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 1 Channel 0-3 Thermal Control 1 (rev 04)
7f:10.2 System peripheral: Intel Corporation Ivytown Integrated Memory Controller 1 Channel 0-3 ERROR Registers 0 (rev 04)
...
Well, I am aware of network card intel 82579LM has an issue with network driver, therefore I have download the latest network driver e1000e.3.0.4.1 which was said fixed the problem.

I followed the suggestions some suggestion from some experienced users, let the network-manager taken over control. This is my /etc/network/interfaces:

Quote:
# The loopback network interface
auto lo
iface lo inet loopback
and /etc/NetworkManager/NetworkManager.conf
Quote:
[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true
And ifconfig:
Quote:
eth0 Link encap:Ethernet HWaddr f8:b1:56:bb:ae:fd
inet addr:10.217.135.159 Bcast:10.217.135.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1472 Metric:1
RX packets:482076 errors:0 dropped:0 overruns:0 frame:0
TX packets:111499 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:93030121 (88.7 MiB) TX bytes:57142484 (54.4 MiB)
Interrupt:20 Memory:e7600000-e7620000

eth1 Link encap:Ethernet HWaddr f8:b1:56:bb:af:47
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Memory:e7100000-e7200000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:50097 errors:0 dropped:0 overruns:0 frame:0
TX packets:50097 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:49575653 (47.2 MiB) TX bytes:49575653 (47.2 MiB)
Can anybody give a suggestion?
 
Old 06-10-2014, 12:33 PM   #2
foodown
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Registered: Jun 2009
Location: Texas
Distribution: Slackware
Posts: 609

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Can we see the output of 'mii-tool eth0'?

What kind of switch are you plugged into?

It may be an ethernet media autonegotiation issue.
 
Old 06-10-2014, 07:27 PM   #3
Westeros
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Registered: Mar 2014
Posts: 2

Original Poster
Rep: Reputation: Disabled
hi foodown, thanks for pointing.
The mii-tool -v output is
Quote:
SIOCGMIIREG on eth0 failed: Input/output error
SIOCGMIIREG on eth0 failed: Input/output error
eth0: negotiated 1000baseT-FD flow-control, link ok
product info: vendor 00:55:00, model 9 rev 0
basic mode: autonegotiation enabled
basic status: autonegotiation complete, link ok
capabilities: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
link partner: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
eth1: no link
product info: vendor 00:50:43, model 0 rev 0
basic mode: autonegotiation enabled
basic status: no link
capabilities: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
Did you see anything unusual?

And its very unlikely the switch problem. As I said, we are a medium size company, hundred s of machines are connected, no similar situations are reported.
 
Old 07-10-2014, 08:55 AM   #4
amilo
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Registered: Oct 2011
Location: Nederland
Distribution: Debian, Centos, Ubuntu
Posts: 65

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Search in /var/log/messages for link up and or link down
tail -f /var/log/messages
 
  


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