Faulty NIC?

Street · 22 Nov 2011 at 22:34

One of our clients has got a server (if you could call it that as its some home build thing that they insist on using) but every few minutes it totally loses its LAN connection and drops my RDP session. If I run it pinging the router the following happens every so often:

Reply from 192.168.10.1: bytes=32 time<1ms TTL=64
Reply from 192.168.10.1: bytes=32 time<1ms TTL=64
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Reply from 192.168.10.10: Destination host unreachable
Request timed out.
Reply from 192.168.10.10: Destination host unreachable.
Request timed out.
Request timed out.
Request timed out.
Reply from 192.168.10.10: Destination host unreachable.
Request timed out.
Request timed out.
Request timed out.
Reply from 192.168.10.10: Destination host unreachable.
Request timed out.
Request timed out.
Reply from 192.168.10.10: Destination host unreachable.
Request timed out.
Reply from 192.168.10.10: Destination host unreachable.
Request timed out.
Request timed out.
Reply from 192.168.10.10: Destination host unreachable.
Request timed out.
Reply from 192.168.10.10: Destination host unreachable.
Reply from 192.168.10.10: Destination host unreachable.
Reply from 192.168.10.10: Destination host unreachable.
Reply from 192.168.10.10: Destination host unreachable.
Reply from 192.168.10.10: Destination host unreachable.
Reply from 192.168.10.10: Destination host unreachable.
Reply from 192.168.10.1: bytes=32 time=2ms TTL=64
Reply from 192.168.10.1: bytes=32 time=7ms TTL=64

I know the cables and switch are working fine and I have updated the drivers on the NIC but the same happens.

Anyone got any other ideas or is the NIC dieing?

geuben · 22 Nov 2011 at 22:35

Potential IP conflict?

pyropetepete · 22 Nov 2011 at 22:42

Try a static ip

Street · 22 Nov 2011 at 22:43

Its set to static and I've tried another IP well out of the way of everything else and it does the same.

pyropetepete · 22 Nov 2011 at 23:40

Worth trying a nic card to see, cheap enough

bremen1874 · 22 Nov 2011 at 23:45

If their server is dropping its lan connection that often what's happening to the other client machines?

Have you tried leaving a ping going from another client pc for comparison?

Street · 22 Nov 2011 at 23:48

bremen1874 said:
If their server is dropping its lan connection that often what's happening to the other client machines?

The clients lose all connection to the shares etc while the server has dropped its connection.

pyropetepete said:
Worth trying a nic card to see, cheap enough

Think I'll have to find one tomorrow and see, can't seem to find anything else that could be causing it!

carte_blanche · 24 Nov 2011 at 16:17

set the duplex and speed manually,

have a look to see if the port has an mdi/mdix button on it, if it does press it to reverse the current setting and test again.

(unlikely but have seen it) make sure the cabling is good, cat5/6 often works fine when first put into the receptacle but mavity slowly gets its way and any bad pairs cause problems. if the cat cable has any grounding/shielding make sure that isn't touching anything it shouldn't be.

check tcp settings match again, paying attention to the mtu in case someone got creative after reading the first paragraph of PC Pro

ping 127.0.0.1 -t to make sure the local tcp stack is good (overworked/badly configured AV package could be causing the dropouts)