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Ubuntu server - NIC suddenly loses connectivity
The Next CEO of Stack OverflowInstalling Ubuntu Server fails to detect NICDual Port Server Nic QuestionNew server, Old nicMultiple IP's using one NIC connectivity problem - WindowsWhat network loads require NIC polling vs interrupts?KVM NIC passthrough “device already in use”Multiple Gateways for Single SubnetHow to get IPv6 working?NIC suddenly doesn't recognize cableDHCP not working on RTL8111 NIC (DHCP Offer not arriving at receiver)
I'm scratching my head. I recently configured a server with two identical Intel NICs inside a DMZ. This morning at around 8:05, I successfully SSH'd in through the internal interface (via my LAN-based PC) and had access to the outside world as well. When I got into work at 9:30 or so, while I still had external access (eth1), I wasn't able to SSH in, nor could I ping out to the LAN (eth2). Restarting the interfaces or rebooting had no impact.
Beginning at 9:22, every fifteen seconds or so, syslog spits this out ("Virtualization" is the server's hostname):
Jul 4 11:50:46 Virtualization kernel: [ 6239.229261] e1000e: eth2 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Jul 4 11:50:46 Virtualization kernel: [ 6239.229380] e1000e 0000:07:00.0 eth2: Link Speed was downgraded by SmartSpeed
Jul 4 11:50:46 Virtualization kernel: [ 6239.229383] e1000e 0000:07:00.0 eth2: 10/100 speed: disabling TSO
Jul 4 11:50:47 Virtualization kernel: [ 6240.024231] e1000e: eth2 NIC Link is Down
lspci -vv shows me that the two Intel NICs are seen by the system as identical in every way.
The cables and connections are all well tested and weren't touched between 8:05 and the time I came in.
Any ideas?
Thanks,
linux-networking nic dmz
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
bumped to the homepage by Community♦ 10 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
I'm scratching my head. I recently configured a server with two identical Intel NICs inside a DMZ. This morning at around 8:05, I successfully SSH'd in through the internal interface (via my LAN-based PC) and had access to the outside world as well. When I got into work at 9:30 or so, while I still had external access (eth1), I wasn't able to SSH in, nor could I ping out to the LAN (eth2). Restarting the interfaces or rebooting had no impact.
Beginning at 9:22, every fifteen seconds or so, syslog spits this out ("Virtualization" is the server's hostname):
Jul 4 11:50:46 Virtualization kernel: [ 6239.229261] e1000e: eth2 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Jul 4 11:50:46 Virtualization kernel: [ 6239.229380] e1000e 0000:07:00.0 eth2: Link Speed was downgraded by SmartSpeed
Jul 4 11:50:46 Virtualization kernel: [ 6239.229383] e1000e 0000:07:00.0 eth2: 10/100 speed: disabling TSO
Jul 4 11:50:47 Virtualization kernel: [ 6240.024231] e1000e: eth2 NIC Link is Down
lspci -vv shows me that the two Intel NICs are seen by the system as identical in every way.
The cables and connections are all well tested and weren't touched between 8:05 and the time I came in.
Any ideas?
Thanks,
linux-networking nic dmz
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
bumped to the homepage by Community♦ 10 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
By the way, there's nothing wrong with the Intel NIC itself - I just connected it to the LAN and configured it to accept a DHCP IP and everything went perfectly smoothly...
– dlanced
Jul 4 '14 at 17:27
Facing similar problem - suddenly getting the same "disabling TSO" and "NIC Link is Down" messages for my 14.04 (no SmartSpeed message). Using USB tethering searching (in vain) for a solution. Anyone?
– svante
Oct 6 '14 at 15:54
add a comment |
I'm scratching my head. I recently configured a server with two identical Intel NICs inside a DMZ. This morning at around 8:05, I successfully SSH'd in through the internal interface (via my LAN-based PC) and had access to the outside world as well. When I got into work at 9:30 or so, while I still had external access (eth1), I wasn't able to SSH in, nor could I ping out to the LAN (eth2). Restarting the interfaces or rebooting had no impact.
Beginning at 9:22, every fifteen seconds or so, syslog spits this out ("Virtualization" is the server's hostname):
Jul 4 11:50:46 Virtualization kernel: [ 6239.229261] e1000e: eth2 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Jul 4 11:50:46 Virtualization kernel: [ 6239.229380] e1000e 0000:07:00.0 eth2: Link Speed was downgraded by SmartSpeed
Jul 4 11:50:46 Virtualization kernel: [ 6239.229383] e1000e 0000:07:00.0 eth2: 10/100 speed: disabling TSO
Jul 4 11:50:47 Virtualization kernel: [ 6240.024231] e1000e: eth2 NIC Link is Down
lspci -vv shows me that the two Intel NICs are seen by the system as identical in every way.
The cables and connections are all well tested and weren't touched between 8:05 and the time I came in.
Any ideas?
Thanks,
linux-networking nic dmz
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
I'm scratching my head. I recently configured a server with two identical Intel NICs inside a DMZ. This morning at around 8:05, I successfully SSH'd in through the internal interface (via my LAN-based PC) and had access to the outside world as well. When I got into work at 9:30 or so, while I still had external access (eth1), I wasn't able to SSH in, nor could I ping out to the LAN (eth2). Restarting the interfaces or rebooting had no impact.
Beginning at 9:22, every fifteen seconds or so, syslog spits this out ("Virtualization" is the server's hostname):
Jul 4 11:50:46 Virtualization kernel: [ 6239.229261] e1000e: eth2 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Jul 4 11:50:46 Virtualization kernel: [ 6239.229380] e1000e 0000:07:00.0 eth2: Link Speed was downgraded by SmartSpeed
Jul 4 11:50:46 Virtualization kernel: [ 6239.229383] e1000e 0000:07:00.0 eth2: 10/100 speed: disabling TSO
Jul 4 11:50:47 Virtualization kernel: [ 6240.024231] e1000e: eth2 NIC Link is Down
lspci -vv shows me that the two Intel NICs are seen by the system as identical in every way.
The cables and connections are all well tested and weren't touched between 8:05 and the time I came in.
Any ideas?
Thanks,
linux-networking nic dmz
linux-networking nic dmz
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
asked Jul 4 '14 at 16:55
dlanceddlanced
14211
14211
bumped to the homepage by Community♦ 10 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 10 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
By the way, there's nothing wrong with the Intel NIC itself - I just connected it to the LAN and configured it to accept a DHCP IP and everything went perfectly smoothly...
– dlanced
Jul 4 '14 at 17:27
Facing similar problem - suddenly getting the same "disabling TSO" and "NIC Link is Down" messages for my 14.04 (no SmartSpeed message). Using USB tethering searching (in vain) for a solution. Anyone?
– svante
Oct 6 '14 at 15:54
add a comment |
By the way, there's nothing wrong with the Intel NIC itself - I just connected it to the LAN and configured it to accept a DHCP IP and everything went perfectly smoothly...
– dlanced
Jul 4 '14 at 17:27
Facing similar problem - suddenly getting the same "disabling TSO" and "NIC Link is Down" messages for my 14.04 (no SmartSpeed message). Using USB tethering searching (in vain) for a solution. Anyone?
– svante
Oct 6 '14 at 15:54
By the way, there's nothing wrong with the Intel NIC itself - I just connected it to the LAN and configured it to accept a DHCP IP and everything went perfectly smoothly...
– dlanced
Jul 4 '14 at 17:27
By the way, there's nothing wrong with the Intel NIC itself - I just connected it to the LAN and configured it to accept a DHCP IP and everything went perfectly smoothly...
– dlanced
Jul 4 '14 at 17:27
Facing similar problem - suddenly getting the same "disabling TSO" and "NIC Link is Down" messages for my 14.04 (no SmartSpeed message). Using USB tethering searching (in vain) for a solution. Anyone?
– svante
Oct 6 '14 at 15:54
Facing similar problem - suddenly getting the same "disabling TSO" and "NIC Link is Down" messages for my 14.04 (no SmartSpeed message). Using USB tethering searching (in vain) for a solution. Anyone?
– svante
Oct 6 '14 at 15:54
add a comment |
1 Answer
1
active
oldest
votes
Look for problems with the connecting switch or similar equipment. In my case the connecting port on my Zyxel GS1100-24 switch had suddenly died (for good). I moved the cable over to an unused port in the switch and that made it work.
Repeted message in my kern.log while connected to the faulty switch port (enoch beeing my hostname):
Oct 6 17:23:36 enoch kernel: [ 148.458496] e1000e: em1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Oct 6 17:23:36 enoch kernel: [ 148.458507] e1000e 0000:00:19.0 em1: 10/100 speed: disabling TSO
Oct 6 17:23:36 enoch kernel: [ 148.632883] e1000e: em1 NIC Link is Down
answered Oct 8 '14 at 9:27
svantesvante
1011
add a comment |
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1 Answer
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Look for problems with the connecting switch or similar equipment. In my case the connecting port on my Zyxel GS1100-24 switch had suddenly died (for good). I moved the cable over to an unused port in the switch and that made it work.
Repeted message in my kern.log while connected to the faulty switch port (enoch beeing my hostname):
Oct 6 17:23:36 enoch kernel: [ 148.458496] e1000e: em1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Oct 6 17:23:36 enoch kernel: [ 148.458507] e1000e 0000:00:19.0 em1: 10/100 speed: disabling TSO
Oct 6 17:23:36 enoch kernel: [ 148.632883] e1000e: em1 NIC Link is Down
answered Oct 8 '14 at 9:27
svantesvante
1011
add a comment |
Look for problems with the connecting switch or similar equipment. In my case the connecting port on my Zyxel GS1100-24 switch had suddenly died (for good). I moved the cable over to an unused port in the switch and that made it work.
Repeted message in my kern.log while connected to the faulty switch port (enoch beeing my hostname):
Oct 6 17:23:36 enoch kernel: [ 148.458496] e1000e: em1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Oct 6 17:23:36 enoch kernel: [ 148.458507] e1000e 0000:00:19.0 em1: 10/100 speed: disabling TSO
Oct 6 17:23:36 enoch kernel: [ 148.632883] e1000e: em1 NIC Link is Down
answered Oct 8 '14 at 9:27
svantesvante
1011
add a comment |
Look for problems with the connecting switch or similar equipment. In my case the connecting port on my Zyxel GS1100-24 switch had suddenly died (for good). I moved the cable over to an unused port in the switch and that made it work.
Repeted message in my kern.log while connected to the faulty switch port (enoch beeing my hostname):
Oct 6 17:23:36 enoch kernel: [ 148.458496] e1000e: em1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Oct 6 17:23:36 enoch kernel: [ 148.458507] e1000e 0000:00:19.0 em1: 10/100 speed: disabling TSO
Oct 6 17:23:36 enoch kernel: [ 148.632883] e1000e: em1 NIC Link is Down
answered Oct 8 '14 at 9:27
svantesvante
1011
Look for problems with the connecting switch or similar equipment. In my case the connecting port on my Zyxel GS1100-24 switch had suddenly died (for good). I moved the cable over to an unused port in the switch and that made it work.
Repeted message in my kern.log while connected to the faulty switch port (enoch beeing my hostname):
Oct 6 17:23:36 enoch kernel: [ 148.458496] e1000e: em1 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Oct 6 17:23:36 enoch kernel: [ 148.458507] e1000e 0000:00:19.0 em1: 10/100 speed: disabling TSO
Oct 6 17:23:36 enoch kernel: [ 148.632883] e1000e: em1 NIC Link is Down
answered Oct 8 '14 at 9:27
svantesvante
1011
answered Oct 8 '14 at 9:27
svantesvante
1011
answered Oct 8 '14 at 9:27
svantesvante
1011
answered Oct 8 '14 at 9:27
svantesvante
1011
1011
add a comment |
add a comment |
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By the way, there's nothing wrong with the Intel NIC itself - I just connected it to the LAN and configured it to accept a DHCP IP and everything went perfectly smoothly...
– dlanced
Jul 4 '14 at 17:27
Facing similar problem - suddenly getting the same "disabling TSO" and "NIC Link is Down" messages for my 14.04 (no SmartSpeed message). Using USB tethering searching (in vain) for a solution. Anyone?
– svante
Oct 6 '14 at 15:54