From owner-freebsd-questions Fri Apr 7 07:44:51 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id HAA08706 for questions-outgoing; Fri, 7 Apr 1995 07:44:51 -0700 Received: from sbstark.cs.sunysb.edu (sbstark.cs.sunysb.edu [130.245.1.47]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id HAA08700 for ; Fri, 7 Apr 1995 07:44:48 -0700 Received: from starkhome.UUCP (root@localhost) by sbstark.cs.sunysb.edu (8.6.12/8.6.9) with UUCP id KAA15738 for questions@freebsd.org; Fri, 7 Apr 1995 10:44:41 -0400 Received: by starkhome.cs.sunysb.edu (8.6.11/1.34) id IAA01440; Fri, 7 Apr 1995 08:33:25 -0400 Date: Fri, 7 Apr 1995 08:33:25 -0400 From: starkhome!gene@sbstark.cs.sunysb.edu (Gene Stark) Message-Id: <199504071233.IAA01440@starkhome.cs.sunysb.edu> To: "Mike O'Brien" Cc: questions@FreeBSD.org In-reply-to: "Mike O'Brien"'s message of Fri, 7 Apr 1995 01:55:10 -0700 Subject: pppstats shows 5% packet error rate Sender: questions-owner@FreeBSD.org Precedence: bulk > My PPP connection appears to run as it should, but it also shows >about a 5-10% packet error rate. Running pppstats, I can see batches of 7 >or 8 errors happening at a time during, say, an inbound FTP. During >these periods the modem shows as mostly idle. Possibly it's waiting for a >TCP timeout/retransmission. I am running a U.S. Robotics Sportster >modem, 14.4Kb, dialup into an Annex box. I have 16550s in my Pentium 90. >I'm running a Logitech bus mouse and XFree86 3.1.0 at the time. > > > Is anybody else seeing this? Even suggestions of what to tear >into would be welcome. I am comfortable with banging on kernel source if >I know where to start. Are you sure that RTS/CTS flow control is enabled and working on both the modem and on the CPU? Are you getting any associated "silo overflow" messages on the console? Have you tried running "tcpdump" on the ppp interface to see what packets are coming across? How about netstat -s? - Gene Stark