If you've got cisco gear, shut down the machine that is having the problem. Wait 5 minutes. The command "sho mac- | inc xxxx.xxxx.xxxx" where xxxx.xxxx.xxxx is the mac address of the machines should show if that mac is active somewhere else. Substitute commands for the switches you have it they aren't cisco. You might have to trace the mac through uplink ports if you have more than one switch.
-----Original Message----- From: Eric Brouwer [mailto:[email protected]] Sent: Wednesday, March 31, 2010 4:56 PM To: NT System Admin Issues Subject: Re: Strange network issue You're certainly on to something with the MAC idea.... This PC runs an Avid DS suite, and has Tinder as well. The licensing for these programs is tied to various system IDs including the MAC. I noticed the MAC was being entered in the NIC properties, so it's not using it's default. If I change this, and use the default, all the problems go away. When I use this specific MAC, I get flaky connectivity. Is it possible there is another device on the network using this MAC? Bad routing table somewhere perhaps? Any suggestions on how to track it down? Thanks again! On Mar 30, 2010, at 10:05 PM, Kurt Buff wrote: > What's the MAC address for the DG? What does 'arp -a' reveal while a > successful ping is going on, and after it fails? > > Kurt > > On Tue, Mar 30, 2010 at 08:01, Eric Brouwer <[email protected]> > wrote: >> The default gateway is actually 192.168.0.101. When you >> experienced this >> issue, was just one station affected, or all? If I ping the same >> DG from >> other stations, I do not experience the timeouts. >> >> Thanks! >> >> On Mar 30, 2010, at 10:58 AM, Glen Johnson wrote: >> >>> Maybe a wild shot, but we had this problem once. >>> Is the default gateway 192.168.0.1? >>> Vendor brought in a DVR with had a static ip configured to that >>> same. >>> Chased that one down for quite a while. >>> Could be someone brought in a wap or other device with same ip as >>> the >>> default gateway. >>> >>> -----Original Message----- >>> From: Eric Brouwer [mailto:[email protected]] >>> Sent: Tuesday, March 30, 2010 10:16 AM >>> To: NT System Admin Issues >>> Subject: Strange network issue >>> >>> Good morning, >>> >>> I'm having a very odd networking issue with one computer in the >>> office. The machine in question is an HP box running XP Pro and is >>> used for video editing. When the editor tries to access network >>> resources, he sometimes loses his network connection and his process >>> basically locks up. This happens during simple file transfers >>> through >>> Explorer. >>> >>> Here's where it gets weird... >>> >>> I started a continuos ping (ping -t) to the file server in question, >>> and everything looks great. No lost packets at all. I then ran the >>> same ping to the default gateway and I'm seeing a lot of Request >>> time >>> outs. I'd say 10-15% of the ping requests fail. >>> >>> Any idea why I'd have trouble pinging the DG, but not a resource on >>> the other side of the DG? >>> >>> Thank you, >>> >>> Eric Brouwer >>> IT Manager >>> www.forestpost.com >>> [email protected] >>> 248.855.4333 >>> >>> >>> >>> >>> >>> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ >>> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ >>> >>> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ >>> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ >>> >> >> >> Eric Brouwer >> IT Manager >> www.forestpost.com >> [email protected] >> 248.855.4333 >> >> >> >> >> >> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ >> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ >> > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > Eric Brouwer IT Manager www.forestpost.com [email protected] 248.855.4333 ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
