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The Question is: Hello, Every time we make an ftp between two VAX of large files (> 100 Mb) we have this error message which appears 550-Network READ failure. 550 connect to network object timed-out golden failed We have no problem for the small files and the transfer takes place well. We have no network problem and we can make a transfer of large files between 2 machines NT. Please, could you please check may cause the problem. Cordially. $ tcpip sho version Compaq TCP/IP Services for OpenVMS Alpha Version V5.1 - ECO 4 on a AlphaServer DS20 500 MHz running OpenVMS V7.2-1 File Transfer Protocol (FTP): TCPIP$FTP_CHILD;1 V5.1-15E 24-AUG-2001 SYS$COMMON:[SYSEXE] TCPIP$FTP_CLIENT;1 V5.1-15I 17-APR-2002 SYS$COMMON:[SYSEXE] TCPIP$FTP_SERVER;1 V5.1-15E 24-AUG-2001 SYS$COMMON:[SYSEXE] TCPIP$TFTP;1 V5.1-15A 27-APR-2001 SYS$COMMON:[SYSEXE] The Answer is :
This could be a known interaction between TCP/IP V5.1 ECO 4 and a
unitary MTU setting that is occasionally found after upgrades from
older IP releases.
Intervening firewalls can also potentially be involved.
If tcp_mssdflt is set to 1, consider resetting it to the typical 536.
After having invoked the following:
@sys$startup:tcpip$define_commands.com
Use the following to display the current tcp_mssdflt value:
sysconfig -q inet tcp_mssdflt
And -- if set otherwise -- use the following to reset the value:
sysconfig -r inet tcp_mssdflt=536
Please also seriously consider an upgrade to a more current TCP/IP
Services release, and then apply the associated ECO kit (if any).
Related topics include (8338).
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