SG Broadband Community

Posted: **Tue Aug 26, 2003 3:13 am**

if your "Segments Retransmitted" is huge number(more than 1/4 of "Segments Received"), try to increase the value of TCPInitialRtt (DWORD) in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{#Interface}

Default is 3000 (Dec.), try 5000 or more.
=)

Posted: **Thu Aug 28, 2003 5:17 pm**

Originally posted by wangnan
if your "Segments Retransmitted" is huge number(more than 1/4 of "Segments Received"), try to increase the value of TCPInitialRtt (DWORD) in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{#Interface}

Default is 3000 (Dec.), try 5000 or more.
=)

Interesting. I Don't see that setting in my registry. I run a search through registry for "TCPInitialRtt", NO RESULTS.
What now?

Posted: **Thu Aug 28, 2003 8:49 pm**

From M$

TcpInitialRTT

Key: Comm\Adapter Name\Parms\Tcpip

Value Type: REG_DWORD — Number

Valid Range: 0–0xFFFF (0–65,535 decimal)

Default: 3

Description: This parameter controls the initial time-out used for a TCP connection request on a per-interface basis. Use caution when tuning with this parameter, because exponential backoff is used. Setting this value larger than 3 will result in much longer time-outs to nonexistent addresses.

SG Broadband Community

TCPInitialRtt and "Segments Retransmitted"

TCPInitialRtt and "Segments Retransmitted"

Re: TCPInitialRtt and "Segments Retransmitted"