Date: Tue, 14 Mar 1995 00:02:26 -0500 From: durham@w2xo.pgh.pa.us Subject: Ethernet will only transfer small files with FTP Message-ID: <199503140502.AAA00368@w2xo.pgh.pa.us>
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Description: When transferring files from my 1.1.5.1 system to my 2.0 system, the first 12k comes in immediately, then a pause, then the total goes to 20880, then a long pause at 29400 bytes, from which point nothing further happens. Going in the other direction (client on the 1.1.5.1 system, server running on the 2.0 system, moving files TO the 1.1.5.1 sys) I get "NIC Memory Corrupt, illegal packet length 1518" on the 1.1.5.1 system's console, indicating that the 2.0 system is sending oversize packets. Looks like they are blowing away the WD8003's ram buffer. (Wish I had 2 of those WD8003's!). The 2.0 system's card is a 3Comm 3C500 with the el driver. Is this the problem? It should be electrically identical to a 3C501, but maybe not? The card in the 1.1.5.1 system is a WD8003. I can telnet to the 1.1.5.1 system from the 2.0 system and "cat" the same file, and it scrolls the whole thing out on the screen of the 2.0 system without any hangups. This leads me to believe the problem is in the ftp client, like some sort of disk buffering thing? Also, I have a DOS system on the disk and using a windows shareware program "QVTNET" , with the FTP software packet driver, I get good results with the same card to the 1.1.5.1 system. So, it's most definitely on the 2.0 end. Repeat-By: Telnet into 1.1.5.1 system from 2.0 system using el driver. Try to transfer a large file (> 30K ). Small files work fine. Thanks, Jim Durham
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