Re: 2.2.5 kernel & TCP/IP Terminal Server problem

Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 17 Sep 1999 16:10:32 +0100 (BST)

> When the users telnet to a RH 6.0 system (2.2.5 kernel out of the box) the
> screens refresh poorly, i.e. sluggish and pausy, may take 3-5 secs to draw one
> 80x25 screen (terminals run at 19200 generally, and are up to it, so little
> more than a second is normal....

I need a tcpdump of a session to judge this. There are two probable causes
since 2.0 is ok

1. The spiderports don't handle SACK and are confused by the offers
2. The spiderports don't handle the way Linux deals with small window
offers and retransmits. PC/TCP has a horrible bug there and the
results sound similar.

Alan

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