topic 2008R2 realy slow network in Operating System - Microsoft https://community.hpe.com/t5/operating-system-microsoft/2008r2-realy-slow-network/m-p/4505692#M11933 Hello I have 5 Bl465g5 with Microsoft Windows 2008 R2 with HyperV role installed.<BR />The servers are plugged through an HP Virtual connect to a Procurve switch<BR />If I try to send a file from a pc (on the same procurve switch) to one of these servers the maximum speed I can reach is 30kb/s.<BR />I have latest firmware and drivers, and I tried to disable offload checksum on the server. Sniffing through Wireshark I get many "TCP segment of a reassembled PDU" and "TCP REtrasmission" or "TCP-Out-OF-Order" messages.<BR />Hope someone can help me<BR />Thank you in advance Wed, 30 Sep 2009 13:39:34 GMT Gianluca Nanoia 2009-09-30T13:39:34Z 2008R2 realy slow network https://community.hpe.com/t5/operating-system-microsoft/2008r2-realy-slow-network/m-p/4505692#M11933 Hello I have 5 Bl465g5 with Microsoft Windows 2008 R2 with HyperV role installed.<BR />The servers are plugged through an HP Virtual connect to a Procurve switch<BR />If I try to send a file from a pc (on the same procurve switch) to one of these servers the maximum speed I can reach is 30kb/s.<BR />I have latest firmware and drivers, and I tried to disable offload checksum on the server. Sniffing through Wireshark I get many "TCP segment of a reassembled PDU" and "TCP REtrasmission" or "TCP-Out-OF-Order" messages.<BR />Hope someone can help me<BR />Thank you in advance Wed, 30 Sep 2009 13:39:34 GMT https://community.hpe.com/t5/operating-system-microsoft/2008r2-realy-slow-network/m-p/4505692#M11933 Gianluca Nanoia 2009-09-30T13:39:34Z Re: 2008R2 realy slow network https://community.hpe.com/t5/operating-system-microsoft/2008r2-realy-slow-network/m-p/4505693#M11934 You may wish to try enabling flow control on your NICs and switch ports. Wed, 30 Sep 2009 18:05:11 GMT https://community.hpe.com/t5/operating-system-microsoft/2008r2-realy-slow-network/m-p/4505693#M11934 WFHC-WI 2009-09-30T18:05:11Z Re: 2008R2 realy slow network https://community.hpe.com/t5/operating-system-microsoft/2008r2-realy-slow-network/m-p/4505694#M11935 1 month later, with new drivers and firmware, same problem.<BR /><BR />The problem was solved turning off and then turning on the switch :S<BR /><BR /> Thu, 15 Oct 2009 14:44:09 GMT https://community.hpe.com/t5/operating-system-microsoft/2008r2-realy-slow-network/m-p/4505694#M11935 Gianluca Nanoia 2009-10-15T14:44:09Z