Messages in this thread | | | Date | Tue, 24 Nov 1998 23:41:36 +1100 (EST) | From | Jim Woodward <> | Subject | Re: 2.1.129: "TCPv4 bad checksum" errors with PPP |
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On Mon, 23 Nov 1998, Jim Gettys wrote:
> > On Monday, 23 November 1998 at 12:19, Jamie Lokier wrote: > > > I wrote: > > I saw on end-to-end interest list a while back that there is a (currently > unexplained) lot of packets with bad checksums floating around the net > at the moment. They are trying to diagnose the problem at the moment. > > One out of 7000 is pretty bad. You might see if the frequency you see > is similar to that Craig Partridge reports.
Well if it helps. under 2.1.129 i get these "TCPv4 bad checksum" errors.. im on a p166, 64meg ram 2x 16550 and 2x 16C650 UART's (all running on seperate IRQ's) the modem is on ttyS1.. (a 16550), the modem is a USRobotics V.90 Courier DS.. it connects to USR/3Com Total Control gear via the same modem technology..
Connect rate at present is 14400 v32bis (my perm connection is a fixed rate, modem is capable of higher connects to the generic dialup pool)
I get back checkups from Linux servers sitting on the otherside of the TC racks only 2 hops from my box.. also from FreeBSD and BSDI boxes..
I dont think it discriminates :)
Any more clues from this?
[23:39:43] root:~# ifconfig ppp0 ppp0 Link encap:Point-to-Point Protocol inet addr:203.31.83.230 P-t-P:203.60.16.180 Mask:255.255.255.0 UP POINTOPOINT RUNNING MTU:1064 Metric:1
could it be something to do with the size of the MTU/MRU? (both are set to 1064)
Regards, Jim.
_____________________________________________________________________________ __ name: james woodward (jim) / . _ _ email: jim@jim.southcom.com.au, jim@woodward.southcom.com.au (_/ / / \/ ) www: http://jim.southcom.com.au, http://www.mailbag.ml.org +---------------------------------------------------------------------------+ | The e-mail address of this message is copyright. If you use them for | | inappropriate spamming, you agree to pay $5,000 to James Woodward for | | every act of misuse and unauthorized reproduction without permission. | +---------------------------------------------------------------------------+
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