Question

Error 10054 WSAECONNRESET appear in SAP via VPN Remote Access (Cisco IPSEC)

Asked by: chekfu

Hi Experts

I have just setup Remote Access VPN (IPSEC) using Cisco ASA 5505. I use my laptop and have tested all services and programs (e.g. Exchange MAPI, POP3, ping hostname/IP, map network drive) are working except SAP.
After launching SAP 620 and then logon, a error dialog box appears as below:

Sapgui620
connection to partner broken

Time                Wed May 14 17:09:51 2008
Component     NI (network interface)
Release          620
Version           36
Module            ninti.c
Line                 1094
Method            NiPRead (192.168.0.31/sapdp00)
Return Code   -6
System Call    recv
Error No         10054
Error Text       WSAECONNRESET: Connection reset by peer
Counter           1

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Asked On
2008-05-14 at 06:17:57ID23401251
Topics

SAP ERP

,

IPSec Security Protocol

,

Virtual Private Networking (VPN)

Participating Experts
2
Points
500
Comments
6

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Answers

 

by: mass2612Posted on 2008-05-15 at 22:21:27ID: 21580196

Hi,

The error "WSAECONNRESET: Connection reset by peer" is a network error plain and simple. What you need to do is to try to figure out what is blocking your SAP connection attempts or causing them to timeout.

The first test is to use telnet to connect from the PC over the VPN connection to the SAP application server or certral instance.

telnet <SID>db 3000 for example: -
Take a SAP instance of C14, the database is running as C14db and the system number is 04. The command would be: -

telnet C14db 3004

You can get the system number etc by selecting the SAP system in the SAP GUI menu and selecting Change Item.

Your other more detailed way to troublshoot this is to use the NIPING tool. This is located under "C:\Program Files\SAP\FrontEnd\SAPgui" on your client.

Sstart the NIPING server on computer A i.e. App Server with the command line:
niping -s -I 0        (the last character is zero, not the letter O)

Then start the client i.e PC over VPN with the command:
niping -c -H C14db [ -B 500 -L 1000 -D 10 ]

500=determines the size of the data packets. Please test at least the values 500, 1000, 1400, 1500, 4000 and 10000.

1000=is the number of packets sent (default 10). To find spurious erors it may help to simulate high network load using 1000 loops or more. For a permanent test use a number of e.g. 1000000 loops

10=Delay in milliseconds

 

by: chekfuPosted on 2008-05-20 at 08:05:27ID: 21606839

Hi mass2612

Thanks for your reply.

I have figured out the issue. It is happened such a coincidence of IP conflict. Do not why a machine is assigned static IP address same as VPN. Right now, the issue has been resolved.

 

by: sysengw2kPosted on 2008-05-22 at 00:44:38ID: 21621619

Hi Experts,
This problem is not occures only in IP conflict situation.  More in details, this problem is related to the local PC as well as the Application Server. That means If retransmission of Data packets exeed the limit or Application Server "keep alive" parameters exeed, connection to the remote server get dropped.

To troubleshoot this issue, The number of retransmissions can be changed by the following registry parameters:

.Establishing a connection
Windows NT/ Windows 2000:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\TCPIP\Parameters
Via menu 'Edit - Add Value', add 'TcpMaxConnectRetransmissions'.
Data Type: REG_DWORD
Valid Range: 0 - 0xFFFFFFFF
Default: 3


Windows95/ Windows98:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP
Via menu 'Edit - Add Value', add 'MaxConnectRetries'.
Data Type: String
Valid Range: 0 - 0xFFFFFFFF
Default: 3


.Existing connection:
Windows NT/ Windows 2000:
Via menu 'Edit - Add Value', add 'TcpMaxDataRetransmissions'.
Data Type: REG_DWORD
Valid Range: 0 - 0xFFFFFFFF
Default: 5

Windows95/ Windows98:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP
Via menu 'Edit - Add Value', add 'MaxDataRetries'.
Data Type: String
Valid Range: 0 - 0xFFFFFFFF
Default: 5


At the Application Server, add or change the following parameters in DEFAULT PROFILE using T-code RZ10.
rdisp/max_wprun_time 1500
rdisp/gui_auto_logout 14400

or experiment little to get the appropriate values in your situation...

hope it will help you....

20120131-EE-VQP-002

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