HELLO ALL, I am facing problem since last couple of weeks in my network. LAN Speed is too much slow. If i wanted to copy 1GB file from One Computer on The Other When Both Computers are using Cable Connection. 300KB-400KB speed is coming there and copy taking almost 1 an hour. Also Ping response between clients are Servers is not good, sometimes 77ms, 100ms, 140ms and so on. I want to trace where is the problem in my network, what are the free best and efficient monitoring solutions that can tell me where is the problem in my network. Kindly Guide Thanks Thanks Jazaib Hussain

Hi Jazaib, Thanks for posting here. So what OS is running in this scenario and do you still remember what option have we done recently before we got this issue up ? > I want to trace where is the problem in my network, what are the free best and efficient monitoring solutions that can tell me where is the problem in my network. We usually will suggest to troubleshoot by capturing and analyzing traffics between source and destination hosts with using traffic capturing software , like Network Monitor form Microsoft: Part 2: TCP Performance Expert and General Trouble Shooting http://blogs.technet.com/b/netmon/archive/2007/01/26/part-2-tcp-performance-expert-and-general-trouble-shooting.aspx Meanwhile, we have same known SMB slow performance issues and have also provided patches , but please first clarify the information of your environments: Slow Network traffic Windows server 2008 R2 X64 - Windows 2003 R2 Standard http://social.technet.microsoft.com/Forums/en-US/winserverPN/thread/651cffb3-3d29-46ae-8828-ae3ce775c9ba/ Slow SMB performance when you copy files from Windows XP to a Windows 2000 domain controller http://support.microsoft.com/kb/321169/ Slow File Transfer with Service Pack 2 on Windows Server 2003? http://blogs.technet.com/b/networking/archive/2009/03/12/slow-file-transfer-with-service-pack-2-on-windows-server-2003.aspx List of Network related hotfixes http://blogs.technet.com/b/yongrhee/archive/tags/network/ Thanks. Tiger LiTiger Li TechNet Community Support

Hi Jazaib, Thanks for posting here. So what OS is running in this scenario and do you still remember what option have we done recently before we got this issue up ? > I want to trace where is the problem in my network, what are the free best and efficient monitoring solutions that can tell me where is the problem in my network. We usually will suggest to troubleshoot by capturing and analyzing traffics between source and destination hosts with using traffic capturing software , like Network Monitor form Microsoft: Part 2: TCP Performance Expert and General Trouble Shooting http://blogs.technet.com/b/netmon/archive/2007/01/26/part-2-tcp-performance-expert-and-general-trouble-shooting.aspx Meanwhile, we have same known SMB slow performance issues and have also provided patches , but please first clarify the information of your environments: Slow Network traffic Windows server 2008 R2 X64 - Windows 2003 R2 Standard http://social.technet.microsoft.com/Forums/en-US/winserverPN/thread/651cffb3-3d29-46ae-8828-ae3ce775c9ba/ Slow SMB performance when you copy files from Windows XP to a Windows 2000 domain controller http://support.microsoft.com/kb/321169/ Slow File Transfer with Service Pack 2 on Windows Server 2003? http://blogs.technet.com/b/networking/archive/2009/03/12/slow-file-transfer-with-service-pack-2-on-windows-server-2003.aspx List of Network related hotfixes http://blogs.technet.com/b/yongrhee/archive/tags/network/ Thanks. Tiger LiTiger Li TechNet Community Support

Are you sure all switches are Gigabit Ethernet? What make and model switch/router are you using? it seems to me that you have a Fast Ethernet switch (100 Mb) somewhere. And what do you mean by ". . .Both Computers are using Cable Connection?" Do you mean Internet provided by your Cable company provider or all computers are wired (not wireless)? Your choice of capitalization casing is what is confusing. As for free network monitoring tools, you can use MSFT Network Monitor 3.4: http://www.microsoft.com/en-us/download/details.aspx?id=4865 or Wireshark: http://www.wireshark.org/.

Are you sure all switches are Gigabit Ethernet? What make and model switch/router are you using? it seems to me that you have a Fast Ethernet switch (100 Mb) somewhere. And what do you mean by ". . .Both Computers are using Cable Connection?" Do you mean Internet provided by your Cable company provider or all computers are wired (not wireless)? Your choice of capitalization casing is what is confusing. As for free network monitoring tools, you can use MSFT Network Monitor 3.4: http://www.microsoft.com/en-us/download/details.aspx?id=4865 or Wireshark: http://www.wireshark.org/.

Hi Jazaib, Thanks for posting here. So what OS is running in this scenario and do you still remember what option have we done recently before we got this issue up ? > I want to trace where is the problem in my network, what are the free best and efficient monitoring solutions that can tell me where is the problem in my network. We usually will suggest to troubleshoot by capturing and analyzing traffics between source and destination hosts with using traffic capturing software , like Network Monitor form Microsoft: Part 2: TCP Performance Expert and General Trouble Shooting http://blogs.technet.com/b/netmon/archive/2007/01/26/part-2-tcp-performance-expert-and-general-trouble-shooting.aspx Meanwhile, we have same known SMB slow performance issues and have also provided patches , but please first clarify the information of your environments: Slow Network traffic Windows server 2008 R2 X64 - Windows 2003 R2 Standard http://social.technet.microsoft.com/Forums/en-US/winserverPN/thread/651cffb3-3d29-46ae-8828-ae3ce775c9ba/ Slow SMB performance when you copy files from Windows XP to a Windows 2000 domain controller http://support.microsoft.com/kb/321169/ Slow File Transfer with Service Pack 2 on Windows Server 2003? http://blogs.technet.com/b/networking/archive/2009/03/12/slow-file-transfer-with-service-pack-2-on-windows-server-2003.aspx List of Network related hotfixes http://blogs.technet.com/b/yongrhee/archive/tags/network/ Thanks. Tiger LiTiger Li TechNet Community Support

Hi Jazaib, Thanks for posting here. So what OS is running in this scenario and do you still remember what option have we done recently before we got this issue up ? > I want to trace where is the problem in my network, what are the free best and efficient monitoring solutions that can tell me where is the problem in my network. We usually will suggest to troubleshoot by capturing and analyzing traffics between source and destination hosts with using traffic capturing software , like Network Monitor form Microsoft: Part 2: TCP Performance Expert and General Trouble Shooting http://blogs.technet.com/b/netmon/archive/2007/01/26/part-2-tcp-performance-expert-and-general-trouble-shooting.aspx Meanwhile, we have same known SMB slow performance issues and have also provided patches , but please first clarify the information of your environments: Slow Network traffic Windows server 2008 R2 X64 - Windows 2003 R2 Standard http://social.technet.microsoft.com/Forums/en-US/winserverPN/thread/651cffb3-3d29-46ae-8828-ae3ce775c9ba/ Slow SMB performance when you copy files from Windows XP to a Windows 2000 domain controller http://support.microsoft.com/kb/321169/ Slow File Transfer with Service Pack 2 on Windows Server 2003? http://blogs.technet.com/b/networking/archive/2009/03/12/slow-file-transfer-with-service-pack-2-on-windows-server-2003.aspx List of Network related hotfixes http://blogs.technet.com/b/yongrhee/archive/tags/network/ Thanks. Tiger LiTiger Li TechNet Community Support

Are you sure all switches are Gigabit Ethernet? What make and model switch/router are you using? it seems to me that you have a Fast Ethernet switch (100 Mb) somewhere. And what do you mean by ". . .Both Computers are using Cable Connection?" Do you mean Internet provided by your Cable company provider or all computers are wired (not wireless)? Your choice of capitalization casing is what is confusing. As for free network monitoring tools, you can use MSFT Network Monitor 3.4: http://www.microsoft.com/en-us/download/details.aspx?id=4865 or Wireshark: http://www.wireshark.org/.

So what OS is running in this scenario and do you still remember what option have we done recently before we got this issue up ? Hay Tiger, Thanks for your reply, Well we have mixed OS environment XP, Windows 7 on client side and Windows Server 2003, Windows Server 2008R2 on server side. Thanks Jazaib Hussain

Hay DarienHawk, Thanks for your reply, Ya you are right that we have mixed switches(100Mb, Gigabits). Ya all computer are wired. Thanks Jazaib Hussain

Hi! First try to copy files between clients on the same switch. Ping must be around 1-2 ms, nothing more. Then try the same with one device on one switch and the second device on the second switch - test ping and copy. If you have 100 Mbit port, speed of copy process will be around 70% - around 70 Mbits (8.5 MB/s). If you have 1 Gbit port then you will have speed around 70-80 MB - you will never reach 100% speed because of TCP/IP overhead. Try to copy file that is big at least 1 or 2 GB, even 5 GB so you will then see if the link is stable or will it become completely unstable with lots of highs and lows regarding nework speed. What kind of switches do you have, managed, unmanaged, what kind of cables do you have, are they linked with UTP or fibre cables? Matjaz

Hi! First try to copy files between clients on the same switch. Ping must be around 1-2 ms, nothing more. Then try the same with one device on one switch and the second device on the second switch - test ping and copy. If you have 100 Mbit port, speed of copy process will be around 70% - around 70 Mbits (8.5 MB/s). If you have 1 Gbit port then you will have speed around 70-80 MB - you will never reach 100% speed because of TCP/IP overhead. Try to copy file that is big at least 1 or 2 GB, even 5 GB so you will then see if the link is stable or will it become completely unstable with lots of highs and lows regarding nework speed. What kind of switches do you have, managed, unmanaged, what kind of cables do you have, are they linked with UTP or fibre cables? Matjaz

Hello Matjaz, thanks for your reply.. We are using Unmanaged switched 100MBs and Cat 6 cables in our environment. I tried to copy 1-2 and 5GB but speed i like 5MB Maximum. Ping is 1,3,4,5,7,19 sometimes 100+ i think there is some problem with my LAN but unable to figured our problem. Thanks Jazaib Hussain

Hi! First try to copy files between clients on the same switch. Ping must be around 1-2 ms, nothing more. Then try the same with one device on one switch and the second device on the second switch - test ping and copy. If you have 100 Mbit port, speed of copy process will be around 70% - around 70 Mbits (8.5 MB/s). If you have 1 Gbit port then you will have speed around 70-80 MB - you will never reach 100% speed because of TCP/IP overhead. Try to copy file that is big at least 1 or 2 GB, even 5 GB so you will then see if the link is stable or will it become completely unstable with lots of highs and lows regarding nework speed. What kind of switches do you have, managed, unmanaged, what kind of cables do you have, are they linked with UTP or fibre cables? Matjaz

Hi! First try to copy files between clients on the same switch. Ping must be around 1-2 ms, nothing more. Then try the same with one device on one switch and the second device on the second switch - test ping and copy. If you have 100 Mbit port, speed of copy process will be around 70% - around 70 Mbits (8.5 MB/s). If you have 1 Gbit port then you will have speed around 70-80 MB - you will never reach 100% speed because of TCP/IP overhead. Try to copy file that is big at least 1 or 2 GB, even 5 GB so you will then see if the link is stable or will it become completely unstable with lots of highs and lows regarding nework speed. What kind of switches do you have, managed, unmanaged, what kind of cables do you have, are they linked with UTP or fibre cables? Matjaz