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ifconfig -a, shows packets are being dropped. What is causing this?

Posted on 2007-10-17
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Last Modified: 2013-12-23
I have a dedicated server somewhere and I just noticed that in 'ifconfig -a' shows me packets are being dropped. Any idea what is causing this? Because I do notice I lose connection to the server once awhile from several locations at the same time.
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Question by:Octalys
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Author Comment

by:Octalys
ID: 20098623
This is the output of 'ifconfig', look at "dropped"..

eth0 Link encap:Ethernet HWaddr 00XXXXXXXXXX
inet addr:72.x.x.x Bcast:72.x.x.x Mask:255.255.255.252
inet6 addr: fe80::xxx:xxxx:xxxx:f911/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9235716 errors:0 dropped:2788 overruns:0 frame:0
TX packets:12852398 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:4154089892 (3.8 GiB) TX bytes:3945351250 (3.6 GiB)
Base address:0x4000 Memory:e0200000-e0220000
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Expert Comment

by:jim_muna
ID: 20098694
try check your firewall  by  typing  iptables -L to show all firewall rule.
please post the result.
thanks
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Accepted Solution

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Gabriel Orozco earned 2000 total points
ID: 20099152
droping packets:

change the cable. this kind of errors is usually the cable, or the switch port (the switch not being able to process) or the land card damaged or with erroneous module loading it.
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Author Comment

by:Octalys
ID: 20099933
We dont have iptables activated.  I am going to check the cables, I also found this in the log this morning.

Oct 17 20:53:28 server kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Down
Oct 17 20:53:33 server kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex
Oct 17 20:53:33 server kernel: e1000: eth0: e1000_watchdog_task: 10/100 speed: disabling TSO
Oct 17 20:53:40 server kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Down
Oct 17 20:53:43 server kernel: e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full Duplex
Oct 17 20:53:43 server kernel: e1000: eth0: e1000_watchdog_task: 10/100 speed: disabling TSO

This wasnt a maintenance.
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Expert Comment

by:Gabriel Orozco
ID: 20102341
ok. now it could be either the lan card, the cable or the switch port... pick your choice and start debugging...
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