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Uh, whats going on here? ICMP replies negative times.

E

EULA

Senior member
Recently I noticed that web pages were coming up rather slowly, and after a virus and spyware scan turned up nothing, I started to think the problem might be hardware related, so I did a few tests and recieved these interesting results:

Ping to Router

Pinging 10.0.0.1 with 32 bytes of data:

Reply from 10.0.0.1: bytes=32 time<1ms TTL=64
Reply from 10.0.0.1: bytes=32 time=-96ms TTL=64
Reply from 10.0.0.1: bytes=32 time<1ms TTL=64
Reply from 10.0.0.1: bytes=32 time=-96ms TTL=64

Ping statistics for 10.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = -96ms, Average = 1073741776ms
Click to expand...


Loopback

Pinging 127.0.0.1 with 32 bytes of data:

Reply from 127.0.0.1: bytes=32 time=97ms TTL=128
Reply from 127.0.0.1: bytes=32 time=-96ms TTL=128
Reply from 127.0.0.1: bytes=32 time<1ms TTL=128
Reply from 127.0.0.1: bytes=32 time=97ms TTL=128

Ping statistics for 127.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = -96ms, Average = 24ms
Click to expand...

I figured it was probably just a flakey card (Built-in nForce) so I disabled that adapter and inserted an Intel Pro 100+ PCI card and the problem seemed to be fixed for about a day. Again today, I noticed webpages were slow and unresponsive, so I tried the above two tests, and it's the same problem.

Am I just so lucky enough to have two bad NICs, or is there something that I'm missing? I've tried uninstalling/reinstalling/updating drivers to no avail. I think I have a 3Com card around somewhere that I can try.

The only other thing I can think to try is to rebuild the TCP/IP stack which I am going to attempt now.

 
Alright, I rebuild the TCP/IP stack, but that didn't change anything, so I rebuilt the Winsock LSP chain using netsh Winsock reset, and so far everything seems to be pretty peachy at time<1ms.


I'll followup later and see if this lasts.
 
I had an ASUS Nforce 4 MB that exhibits this behavior with the Nforce ethernet chipset. The other built in ethernet adapter doesnt.

The problem i found with the Nforce chipset when it produced they negative pings is it would hang network browsing and UNC paths.

keep us updated on what you find. I simple disabled the thing and use the other card.
 
I'm going to try a third card, in the event the intel card I'm using now is bad (It's doing the same thing) and will return.
 
What software would it be then? I've rebuilt TCP/IP and Winsock, but the issue returns. I've already tried testing with my software firewall disabled, but I wouldnt think that would affect a loopback test anyway.

Its not like its just one or replies that does this, its about 75%. I can run the same test on another workstation or server, and don't have the problem.
 
It looks like that has done the trick; I don't know why it just started recently, nor why I haven't had this problem in the past. Thanks much!
 
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