What speed is the serial link running at ? How are you running ppp on each end of the connection? Have you check for errors on the serial line ?
> -----Original Message----- > From: Eugene Stemple [mailto:[EMAIL PROTECTED] > Sent: 14 May 2007 07:05 > To: debian-user@lists.debian.org > Subject: kernel or ppp problem? > > I am seeing an abnormal delay in packets passed over a PPP link > (a null modem cable between two Linux systems) and would post a > formal bug report if I were more confident which package maintainer > to report to. > It might be in the pppd process or it might be in the compiled > kernel ppp support code. I can do the "reportbug" program to get > this properly entered in the bug tracking system so just tell me > which seems to be the appropriate package. > > Here is a brief description: > --- > When a single packet is received from the serial port there is > approx. a 60% probability that it will NOT be passed thru to the > application for approx. 3.75 SECONDS. Or, until another packet > arrives and (apparently) "pushes" it throught the pipe. > This effect is seen in ping tests, in ftp transactions, and in > tcp (html) sessions passing over this PPP path. I've used tcpdump > to capture time information simultaneously at both ends of the PPP > path to verify that the delayed packet was, in fact, sent from one > end but not released by the ppp process at the other end. > -------------------------------------------------------------- > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]