Intermittent Network disconnection, Ubuntu, troubleshooting
Clash Royale CLAN TAG#URR8PPP
up vote
0
down vote
favorite
I purged network manager from my system (OS: Linux 3.13.0-53-generic #89-Ubuntu)
Networking service runs on my system:
sudo service networking status
networking start/running
Static interface info:
iface eth0 inet static
address 100.100.100.216
netmask 255.255.255.0
broadcast 100.100.100.255
gateway 100.100.100.1
dns-nameservers 123.132.134.35
dns-search google.com
Problem: Internet connection disconnects randomly.
Troubleshoot:
I have another windows machine on my LAN that works, when network is not connected on Linux. So, no problem with router
Try to ping gateway
ping 100.100.100.1
PING 100.100.100.1 (100.100.100.1) 56(84) bytes of data.
From 100.100.100.112 icmp_seq=1 Destination Host Unreachable
So, to test this random behaviour I assumed the network traffic might be causing the random behaviour.
So, I did set one of the shell to infinitely ping Google server. After a while as expected I got the following message
ping: sendmsg: No buffer space available
After some time, the network starts working again.
On one of the link it says to increase the size of the buffer (www.cyberciti.biz/faq/linux-tcp-tuning). So I did, and my current proc/sys/net/core/wmem_max size is 83886080
Still, if I do infinite ping again network fails the same way.
Question: Which process/service is causing the network buffer reset? Also, why is it taking so much time to do so?
As a temporary fix, manually unplug-plug Ethernet or do ifdown eth0 && ifup eth0 [But, this is not a correct solution]
linux networking troubleshooting
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
add a comment |
up vote
0
down vote
favorite
I purged network manager from my system (OS: Linux 3.13.0-53-generic #89-Ubuntu)
Networking service runs on my system:
sudo service networking status
networking start/running
Static interface info:
iface eth0 inet static
address 100.100.100.216
netmask 255.255.255.0
broadcast 100.100.100.255
gateway 100.100.100.1
dns-nameservers 123.132.134.35
dns-search google.com
Problem: Internet connection disconnects randomly.
Troubleshoot:
I have another windows machine on my LAN that works, when network is not connected on Linux. So, no problem with router
Try to ping gateway
ping 100.100.100.1
PING 100.100.100.1 (100.100.100.1) 56(84) bytes of data.
From 100.100.100.112 icmp_seq=1 Destination Host Unreachable
So, to test this random behaviour I assumed the network traffic might be causing the random behaviour.
So, I did set one of the shell to infinitely ping Google server. After a while as expected I got the following message
ping: sendmsg: No buffer space available
After some time, the network starts working again.
On one of the link it says to increase the size of the buffer (www.cyberciti.biz/faq/linux-tcp-tuning). So I did, and my current proc/sys/net/core/wmem_max size is 83886080
Still, if I do infinite ping again network fails the same way.
Question: Which process/service is causing the network buffer reset? Also, why is it taking so much time to do so?
As a temporary fix, manually unplug-plug Ethernet or do ifdown eth0 && ifup eth0 [But, this is not a correct solution]
linux networking troubleshooting
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
Typically the "No buffer space" condition occurs when a NIC is unable to send data to a host. If you check your ping times you should be able to correlate increased ping time and/or packet loss with the error message.
– Claris
Jun 24 '15 at 21:16
Also see askubuntu.com on StackExchange.
– jeremiah
Jun 25 '15 at 9:26
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I purged network manager from my system (OS: Linux 3.13.0-53-generic #89-Ubuntu)
Networking service runs on my system:
sudo service networking status
networking start/running
Static interface info:
iface eth0 inet static
address 100.100.100.216
netmask 255.255.255.0
broadcast 100.100.100.255
gateway 100.100.100.1
dns-nameservers 123.132.134.35
dns-search google.com
Problem: Internet connection disconnects randomly.
Troubleshoot:
I have another windows machine on my LAN that works, when network is not connected on Linux. So, no problem with router
Try to ping gateway
ping 100.100.100.1
PING 100.100.100.1 (100.100.100.1) 56(84) bytes of data.
From 100.100.100.112 icmp_seq=1 Destination Host Unreachable
So, to test this random behaviour I assumed the network traffic might be causing the random behaviour.
So, I did set one of the shell to infinitely ping Google server. After a while as expected I got the following message
ping: sendmsg: No buffer space available
After some time, the network starts working again.
On one of the link it says to increase the size of the buffer (www.cyberciti.biz/faq/linux-tcp-tuning). So I did, and my current proc/sys/net/core/wmem_max size is 83886080
Still, if I do infinite ping again network fails the same way.
Question: Which process/service is causing the network buffer reset? Also, why is it taking so much time to do so?
As a temporary fix, manually unplug-plug Ethernet or do ifdown eth0 && ifup eth0 [But, this is not a correct solution]
linux networking troubleshooting
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
I purged network manager from my system (OS: Linux 3.13.0-53-generic #89-Ubuntu)
Networking service runs on my system:
sudo service networking status
networking start/running
Static interface info:
iface eth0 inet static
address 100.100.100.216
netmask 255.255.255.0
broadcast 100.100.100.255
gateway 100.100.100.1
dns-nameservers 123.132.134.35
dns-search google.com
Problem: Internet connection disconnects randomly.
Troubleshoot:
I have another windows machine on my LAN that works, when network is not connected on Linux. So, no problem with router
Try to ping gateway
ping 100.100.100.1
PING 100.100.100.1 (100.100.100.1) 56(84) bytes of data.
From 100.100.100.112 icmp_seq=1 Destination Host Unreachable
So, to test this random behaviour I assumed the network traffic might be causing the random behaviour.
So, I did set one of the shell to infinitely ping Google server. After a while as expected I got the following message
ping: sendmsg: No buffer space available
After some time, the network starts working again.
On one of the link it says to increase the size of the buffer (www.cyberciti.biz/faq/linux-tcp-tuning). So I did, and my current proc/sys/net/core/wmem_max size is 83886080
Still, if I do infinite ping again network fails the same way.
Question: Which process/service is causing the network buffer reset? Also, why is it taking so much time to do so?
As a temporary fix, manually unplug-plug Ethernet or do ifdown eth0 && ifup eth0 [But, this is not a correct solution]
linux networking troubleshooting
linux networking troubleshooting
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
edited Nov 18 at 6:53
Rui F Ribeiro
38.2k1475123
38.2k1475123
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
asked Jun 24 '15 at 19:45
Gaurav Minocha
1033
1033
Typically the "No buffer space" condition occurs when a NIC is unable to send data to a host. If you check your ping times you should be able to correlate increased ping time and/or packet loss with the error message.
– Claris
Jun 24 '15 at 21:16
Also see askubuntu.com on StackExchange.
– jeremiah
Jun 25 '15 at 9:26
add a comment |
Typically the "No buffer space" condition occurs when a NIC is unable to send data to a host. If you check your ping times you should be able to correlate increased ping time and/or packet loss with the error message.
– Claris
Jun 24 '15 at 21:16
Also see askubuntu.com on StackExchange.
– jeremiah
Jun 25 '15 at 9:26
Typically the "No buffer space" condition occurs when a NIC is unable to send data to a host. If you check your ping times you should be able to correlate increased ping time and/or packet loss with the error message.
– Claris
Jun 24 '15 at 21:16
Typically the "No buffer space" condition occurs when a NIC is unable to send data to a host. If you check your ping times you should be able to correlate increased ping time and/or packet loss with the error message.
– Claris
Jun 24 '15 at 21:16
Also see askubuntu.com on StackExchange.
– jeremiah
Jun 25 '15 at 9:26
Also see askubuntu.com on StackExchange.
– jeremiah
Jun 25 '15 at 9:26
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
accepted
I wrote about this just yesterday. Sigh.
The root cause is probably that there is another computer on the network that has the same IP address. Sometimes this is caused by assigning an IP in the a range that DHCP thinks it has control over.
To verify there are conflicting IPs when you Linux box loses network connection, get onto your windows box and see if you can ping 100.100.100.216.
The "buffer space" condition was mentioned by Claris.
edited Apr 13 '17 at 12:36
Community♦
1
answered Jun 25 '15 at 9:26
rocky
1,456514
What if I get request timeout when ping from the other computer when I loss the connection? Does that imply no other guy is using my IP?
– Francis
Dec 21 '17 at 9:00
@Francis rather than try to guess which of the details are relevant to you and which of the details are different, why not start a new question that describes in detail your particular situation and what you have tried. You can link back to this answer if need be.
– rocky
Dec 21 '17 at 11:31
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
I wrote about this just yesterday. Sigh.
The root cause is probably that there is another computer on the network that has the same IP address. Sometimes this is caused by assigning an IP in the a range that DHCP thinks it has control over.
To verify there are conflicting IPs when you Linux box loses network connection, get onto your windows box and see if you can ping 100.100.100.216.
The "buffer space" condition was mentioned by Claris.
edited Apr 13 '17 at 12:36
Community♦
1
answered Jun 25 '15 at 9:26
rocky
1,456514
What if I get request timeout when ping from the other computer when I loss the connection? Does that imply no other guy is using my IP?
– Francis
Dec 21 '17 at 9:00
@Francis rather than try to guess which of the details are relevant to you and which of the details are different, why not start a new question that describes in detail your particular situation and what you have tried. You can link back to this answer if need be.
– rocky
Dec 21 '17 at 11:31
add a comment |
up vote
0
down vote
accepted
I wrote about this just yesterday. Sigh.
The root cause is probably that there is another computer on the network that has the same IP address. Sometimes this is caused by assigning an IP in the a range that DHCP thinks it has control over.
To verify there are conflicting IPs when you Linux box loses network connection, get onto your windows box and see if you can ping 100.100.100.216.
The "buffer space" condition was mentioned by Claris.
edited Apr 13 '17 at 12:36
Community♦
1
answered Jun 25 '15 at 9:26
rocky
1,456514
What if I get request timeout when ping from the other computer when I loss the connection? Does that imply no other guy is using my IP?
– Francis
Dec 21 '17 at 9:00
@Francis rather than try to guess which of the details are relevant to you and which of the details are different, why not start a new question that describes in detail your particular situation and what you have tried. You can link back to this answer if need be.
– rocky
Dec 21 '17 at 11:31
add a comment |
up vote
0
down vote
accepted
up vote
0
down vote
accepted
I wrote about this just yesterday. Sigh.
The root cause is probably that there is another computer on the network that has the same IP address. Sometimes this is caused by assigning an IP in the a range that DHCP thinks it has control over.
To verify there are conflicting IPs when you Linux box loses network connection, get onto your windows box and see if you can ping 100.100.100.216.
The "buffer space" condition was mentioned by Claris.
edited Apr 13 '17 at 12:36
Community♦
1
answered Jun 25 '15 at 9:26
rocky
1,456514
I wrote about this just yesterday. Sigh.
The root cause is probably that there is another computer on the network that has the same IP address. Sometimes this is caused by assigning an IP in the a range that DHCP thinks it has control over.
To verify there are conflicting IPs when you Linux box loses network connection, get onto your windows box and see if you can ping 100.100.100.216.
The "buffer space" condition was mentioned by Claris.
edited Apr 13 '17 at 12:36
Community♦
1
answered Jun 25 '15 at 9:26
rocky
1,456514
edited Apr 13 '17 at 12:36
Community♦
1
edited Apr 13 '17 at 12:36
Community♦
1
edited Apr 13 '17 at 12:36
Community♦
1
1
answered Jun 25 '15 at 9:26
rocky
1,456514
answered Jun 25 '15 at 9:26
rocky
1,456514
answered Jun 25 '15 at 9:26
rocky
1,456514
1,456514
What if I get request timeout when ping from the other computer when I loss the connection? Does that imply no other guy is using my IP?
– Francis
Dec 21 '17 at 9:00
@Francis rather than try to guess which of the details are relevant to you and which of the details are different, why not start a new question that describes in detail your particular situation and what you have tried. You can link back to this answer if need be.
– rocky
Dec 21 '17 at 11:31
add a comment |
What if I get request timeout when ping from the other computer when I loss the connection? Does that imply no other guy is using my IP?
– Francis
Dec 21 '17 at 9:00
@Francis rather than try to guess which of the details are relevant to you and which of the details are different, why not start a new question that describes in detail your particular situation and what you have tried. You can link back to this answer if need be.
– rocky
Dec 21 '17 at 11:31
What if I get request timeout when ping from the other computer when I loss the connection? Does that imply no other guy is using my IP?
– Francis
Dec 21 '17 at 9:00
What if I get request timeout when ping from the other computer when I loss the connection? Does that imply no other guy is using my IP?
– Francis
Dec 21 '17 at 9:00
@Francis rather than try to guess which of the details are relevant to you and which of the details are different, why not start a new question that describes in detail your particular situation and what you have tried. You can link back to this answer if need be.
– rocky
Dec 21 '17 at 11:31
@Francis rather than try to guess which of the details are relevant to you and which of the details are different, why not start a new question that describes in detail your particular situation and what you have tried. You can link back to this answer if need be.
– rocky
Dec 21 '17 at 11:31
add a comment |
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f211931%2fintermittent-network-disconnection-ubuntu-troubleshooting%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Typically the "No buffer space" condition occurs when a NIC is unable to send data to a host. If you check your ping times you should be able to correlate increased ping time and/or packet loss with the error message.
– Claris
Jun 24 '15 at 21:16
Also see askubuntu.com on StackExchange.
– jeremiah
Jun 25 '15 at 9:26