MessageLeon, I would also check outside the boxes for clues. When multiple boxes take a dump together, there is usually an external cause. Are the three affected servers on the same subnet or network switch and different from the unaffected ones? Has anyone made any hard/firm/software changes to network equipment that is in contact with the affected servers? Do the affected servers all get their electrical power from the same PDU and the unaffected ones differ? Inside the boxes...do the affected servers share the same NIC's while unaffected servers differ? NIC drivers? HTH, Raff -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On Behalf Of Jaimes, Leon Sent: Tuesday, November 25, 2003 8:05 PM To: 'thin@xxxxxxxxxxxxx' Subject: [THIN] Anyone ever had servers hang with a STOP error involving tcpip.sys Hello List I just had all three of my Citrix application servers crash. It was about 30 min. between the first 2 and then about an hour till the 3rd went down. We brought in a 4th that we keep as a backup and it took about 15 min. for it to do the same. We are running W2K SP3 with Citrix MetaFrame XPe FR2 on IBM xSeries 330 servers with dual Netfinity NICs that are teamed. The most recent change that is consistent with all servers is that we installed Virus Scan v7 on all of them. We have a Data Store server and a file server both of which are fine. The only ones that don't server the published desktop. This is about the 5th time this has happened, but never to all at once like this. This is the message. STOP: 0X000000D1 (0X00000006,0X00000002,0X00000001,0XBFA239A9) DRIVER_IRQL_NOT_LESS_OR_EQUAL ADDRESS BFA239A9 BASE AT BFA29000, DATESTAMP 3cdaee1a - tcpip.sys I got this off the blue screen, but it also has come up as a console message on them after they hang/crash. I already tried uninstalling and reinstalling TCP/IP and the NIC drivers are up to date. Also if anyone has any opinions on Teaming good or bad I would be interested. Thanks Leon Jaimes PPRM Information Technology Department (303) 813-7614 <mailto:leon.jaimes@xxxxxxxx>