RE: Browsing folder by slow network connection
- From: v-crinal@xxxxxxxxxxxxxxxxxxxx ("Crina Li")
- Date: Fri, 14 Oct 2005 11:06:47 GMT
Hi Kevin,
Thanks for your reply.
Would you please help me double confirm if you have tried all of my
suggestions and the problem still persists? If so, I recommend you to try
the following:
I suspect the problem may be caused by MTU. Please try to use Ping -f -l to
test it as following:
"ping <computer_name or IP_address> -f -l 1472 " (without the quotation
marks)
- The -f parameter causes the Ping utility to send an ICMP echo packet that
has the IP "do not fragment" bit set.
- The -l parameter sets the buffer, or payload, size of the ICMP echo
packet. You specify this size by typing a number after the -l parameter.
By lowering the -l parameter on successive pings, you can identify how
small an unfragmented packet can travel a specific route. The smallest MTU
that is in general use is 576 bytes, so you can safely start with an ICMP
buffer of 548 and then work up from there. For example, if the command
"Ping <computer_name or IP_address> -f -l 972" (without the quotation
marks) returns packets but "Ping <computer_name or IP_address> -f -l 973"
(without the quotation marks) does not return packets, the largest MTU on
that route is 1,000 (972 plus 28).
For detailed information, please refer to the following KB article:
314825 How to Troubleshoot Black Hole Router Issues
http://support.microsoft.com/?id=314825
For Change the Default Maximum Transmission Unit (MTU), please refer to the
following KB article:
826159 HOW TO: Change the Default Maximum Transmission Unit (MTU) Size
Settings for PPP Connections or for VPN Connections
http://support.microsoft.com/?id=826159
If the problem still occurs, would you please do the following test to
narrow down the problem?
1. Create VPN connection from a LAN client computer and then test if the
problem occurs.
2. Connect a laptop to external network card of SBS and then create VPN to
test if the problem occurs.
Thanks for your time and I look forward to your reply.
Best regards,
Crina Li (MSFT)
Microsoft CSS Online Newsgroup Support
Get Secure! - www.microsoft.com/security
=====================================================
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=====================================================
This posting is provided "AS IS" with no warranties, and confers no rights.
--------------------
| Thread-Topic: Browsing folder by slow network connection
| | From: "=?Utf-8?B?S2V2aW4gTGFyb3VjaGU=?="
<KevinLarouche@xxxxxxxxxxxxxxxxxxxxxxxxx>
|| Subject: RE: Browsing folder by slow network connection
| Date: Wed, 12 Oct 2005 06:56:07 -0700
| | Newsgroups: microsoft.public.windows.server.sbs
|
| Hi Crina Li,
|
| Thank you for taking time to find a solution
|
| Response to your four question :
| 1. The situation does not occur on the LAN, but the LAN is not as fast as
| habitual. I say that because Outlook, connect to Exchange on the server
| SBS2003, become a little bit slower.
| 2. The message say that he cannot browse the folder. Well I can't take a
| screenshot beacause I restarted the server yesterday.
| 3. The problematic occur on windows2000 and windowsXP with latest service
| pack and update
| 4. The situation occur on all VPN client. When we try to browse large
| folders or event if we want to see our mail in Outlook that is connect to
| exchange on the problematic server, we can't. It's seems that the server
| can't send us large request.
| Eventually, when I restart the server SBS2003, the problem disappear for
| about 2 week.
|
| Thanks you again
|
| ""Crina Li"" wrote:
|
| > Hi Kevin,
| >
| > Thank you for posting in SBS newsgroup.
| >
| > As far as I know, there are many possible causes for slow network share
| > issue, such as Anti-Virus scanning application and SMB signing.
| >
| > For your reference, I included some general trouble shooting steps for
this
| > kind of issue below:
| >
| > 1. Please make sure that all the computers (including the workstations
and
| > servers) have the latest service pack and hotfixes listed in the KB:
| >
| > 1) 814112 Files on network shares open slowly, opens as read-only, or
you
| > receive
| > http://support.microsoft.com/?id=814112
| >
| > Note that this KB article gives a check list for 2K and XP kind of
| > clients, please make sure that your client computers have every
required
| > service pack and hotfixes listed in this article.
| >
| > 2) 810907 Error Messages When You Open or Copy Network Files on
Windows
| > XP SP1
| > http://support.microsoft.com/?id=810907
| >
| > 3) 815411 Heap Algorithm Update for Atypically Large Heap Requests
| > http://support.microsoft.com/?id=815411
| >
| > 2. Please disable the WebClient service on the Windows XP client. It
is
| > reported that this service sometimes may slow down the network browse
| > performance. You may do as following:
| >
| > 1) Click Start and then Run, type Services.msc and click OK.
| > 2) In the right-pane, double-click on the WebClient service.
| > 3) Change the Startup type from Manual to Disabled.
| > 4) Reboot the computer.
| >
| > 3. If you have any Anti-Virus applications installed on the client or
| > server, please disable or uninstall them to test this issue again. The
| > influence of Antivirus software is documented in 814112.
| >
| > 4. Please disable network drive scanning in your antivirus program. To
| > turn off your antivirus program, see the antivirus program
documentation or
| > online help for steps and information about how to do this. To fully
| > isolate the influence of antivirus, I suggest that you uninstall the
| > Antivirus application to test.
| >
| > If the problem still occurs, let us disable SMB signing in the whole
server
| > domain:
| >
| > 1. Make sure the following policies are all ''Disable'' (instead of
''Not
| > defined'') in BOTH ''Default Domain Policy'' and ''Default Domain
| > Controller Policy'':
| >
| > 1) Microsoft network client: Digitally sign communications (always):
| > Disabled
| > 2) Microsoft network client: Digitally sign communications (if server
| > agrees): Disabled
| > 3) Microsoft network server: Digitally sign communications (always):
| > Disabled
| > 4) Microsoft network server: Digitally sign communications (if client
| > agrees): Disabled
| > 5) LAN Manager Authentication Level set to Send LM and NTLM - use
NTLMv2
| > session security if negotiated
| >
| > You can find the policy as following:
| >
| > 1) Open Server Management, and then expand Advanced Management | Group
| > Policy Management | Forest | Domains | Server name.
| > 2) Right click Default Domain Policy and select Edit.
| > 3) In Group Policy Object Editor, expand Computer Configuration |
Windows
| > Settings | Security Settings | Local Policies.
| > 4) Click Security Options.
| > 5) Open Server Management, and then expand Advanced Management | Group
| > Policy Management | Forest | Domains | Server name | Domain Controllers.
| > 6) Right click Default Domain Controllers Policy and select Edit.
| > 7) In Group Policy Object Editor, expand Computer Configuration |
Windows
| > Settings | Security Settings | Local Policies.
| > 8) Click Security Options.
| >
| > 2. Still on the DC, issue ''gpupdate /force'' in a command console.
| > 3. Restart the DC and client computer to take effect.
| > 4. Disable Oplock, please refer to the following KB article:
| >
| > 296264 Configuring opportunistic locking in Windows
| > http://support.microsoft.com/?id=296264
| >
| > Does it work now? If this issue continues, to narrow down the problem,
| > would you please help me collect the following information?
| >
| > 1. Does the situation occur on LAN client computers when they access
the
| > large folders?
| > 2. What detailed error message you got when you access large folders?
| > Please attach a screen shot to newsgroup.
| > 3. What is the system edition of the problematic client?
| > 4. Does the situation occur on all VPN clients? Do you mean the problem
| > disappears after you reboot the SBS server? If so, when it reoccurs?
| >
| > If anything is unclear, please feel free to let me know. I am glad to
be of
| > assistance.
| >
| > Best regards,
| >
| > Crina Li (MSFT)
| >
| > Microsoft CSS Online Newsgroup Support
| >
| > Get Secure! - www.microsoft.com/security
| >
| > =====================================================
| > This newsgroup only focuses on SBS technical issues. If you have issues
| > regarding other Microsoft products, you'd better post in the
corresponding
| > newsgroups so that they can be resolved in an efficient and timely
manner.
| > You can locate the newsgroup here:
| > http://www.microsoft.com/communities/newsgroups/en-us/default.aspx
| >
| > When opening a new thread via the web interface, we recommend you check
the
| > "Notify me of replies" box to receive e-mail notifications when there
are
| > any updates in your thread. When responding to posts via your
newsreader,
| > please "Reply to Group" so that others may learn and benefit from your
| > issue.
| >
| > Microsoft engineers can only focus on one issue per thread. Although we
| > provide other information for your reference, we recommend you post
| > different incidents in different threads to keep the thread clean. In
doing
| > so, it will ensure your issues are resolved in a timely manner.
| >
| > For urgent issues, you may want to contact Microsoft CSS directly.
Please
| > check http://support.microsoft.com for regional support phone numbers.
| >
| > Any input or comments in this thread are highly appreciated.
| >
| > =====================================================
| >
| > This posting is provided "AS IS" with no warranties, and confers no
rights.
| > --------------------
| > | Thread-Topic: Browsing folder by slow network connection
| > || From: "=?Utf-8?B?S2V2aW4gTGFyb3VjaGU=?="
| > <KevinLarouche@xxxxxxxxxxxxxxxxxxxxxxxxx>
| > | Subject: Browsing folder by slow network connection
| > | Date: Tue, 11 Oct 2005 08:48:04 -0700
| > | | Newsgroups: microsoft.public.windows.server.sbs
| > | |
| > | I have a problem only when I'm connect with a slow connection such as
vpn.
| > | After about 2 or 3 week the server with sbs2003 is start, the vpn
| > connection
| > | is very slow. I can't reach folders that got too much files. But the
| > folders
| > | that only got some file, i can open it. The only solution i got to
| > resolve
| > | this problem is to restart the server. I woul like to know if there's
| > another
| > | solution to this.
| > |
| > | Thanks
| > |
| >
| >
|
.
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- From: Kevin Larouche
- RE: Browsing folder by slow network connection
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