Symptom
Terminations in the communication with the application server.
10054: WSAECONNRESET: Connection reset by peer
10060: WSAETIMEDOUT: Connection timed out
10054: WSAECONNRESET: Connection reset by peer
10060: WSAETIMEDOUT: Connection timed out
Other Terms
Connection termination, WAN, Retransmit, Retransmission
Reason and Prerequisites
If a sent data package is not confirmed by the communication partner
within a time window, the TCP stack will conduct a retransmit through
the timeout. This means that the same data package is sent again.
Retransmissions may occur when establishing the connection as well as
with an existing TCP connection, but they are influenced by different
parameters. The standard amounts to 3 retransmissions when establishing a
connection and 5 retransmissions with an existing connection (see
description below) before the TCP stack terminates the connection. The
retransmission timeout is doubled after every individual retransmit. The
basis timeout is also different with the two parameters. While an
initial timeout of 3 seconds applies when establishing the connection,
The basis timeout is dynamically determined by the measured round trip
time for an existing connection. As a result of this, the basis timeout
changes during an existing TCP session in accordance with the connection
conditions.
Solution
The number of retransmissions can be changed by the following registry parameters:
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
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
An increase by 1 corresponds roughly to a doubling of the timeout time. You may need to experiment a little with the values, to find the setting most appropriate to your requirements.
- Establishing a connection
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:
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
An increase by 1 corresponds roughly to a doubling of the timeout time. You may need to experiment a little with the values, to find the setting most appropriate to your requirements.
Other Attributes
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Header Data
| Released On | 22.01.2002 08:03:15 |
| Release Status | Released for Customer |
| Component | BC-NET Network Infrastructure |
| Priority | Recommendations / Additional Info |
| Category | External error |
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