If its a backbone switch hopefully its new enough and had enough money spent on it that it is also a managed switch. If you telnet / web-browse into it and check the error logging and suchlike on the port the "bad" exchange server is on, is the switch whining about anything on that port? Are the port settings the exact same as they are for servers which are behaving? Nobody plugged a traffic sniffer into another port and "mirrored" it to the bad exchange server's port? If the switch and server NIC are set to auto negociate speed and duplex settings, what happens if you set them manually? (If the connection is 100mb rather than 1ghz, try setting to a nice conservative "fixed" 100mb and half-duplex). Now what about the switch(es) serving the clients. Not all the same switch by any chance? Or same remote cabinet and sharing the same backbone link back to the server room? What happens if you lock a bad workstation and it's switch port down to 100mb-half duplex instead of auto negociate? hth Rob
-----Original Message----- From: Gonzalez, Alex [mailto:[EMAIL PROTECTED] Sent: Wed 26/03/2003 20:31 To: Exchange Discussions Cc: Subject: Possible hardware issue? We have sort of a weird issue going on here and I am wondering if anyone else has seen this. We have an EX2000 server that runs smooth for some users and poorly for others. All the clients are different ranging from 97-2002 so I have taken the client out of the picture. We have changed NICs and the PCI slots on the motherboard and we are still getting the same issues. I performed a ping to it from a workstation that is getting good response with 64k of data and I get clean responses at about 12ms. When I perform the same ping from another workstation that is having difficulties I get a lot of time outs and when I do get responses they are more like 120ms. We have changed the cable, the switch that it goes to, and even plugged a laptop into the same switch and we are getting the same response. The switch that it plugs into is the backbone switch directly. If we move people to another exchange server everything works fine. Has anyone ever seen something like this and if so what did you do? There are also some master browser errors (event 8003) in the event log that talk about UDP but I haven't been able to make anything of them either. Any help would be greatly appreciated. Alex _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] [EMAIL PROTECTED] ,)r+^ry܅)Nrzf%y{!jx0ya1r֝)Zvh&