On Sunday 15 April 2007 16:20, Alan Chandler wrote: > Firstly the case of direct downloading from my gateway. This is a > summary of a three protocol exchanges using wireshark > > youtube->me http continuation seq 189688 next seq 191136 > youtube->me http continuation seq 191136 next seq 192584 > me->youtube tcp ack seq no 192584 > youtube->me http continuation seq 192584 next seq 194032 > > Now when I look at a similar exchange when I am using the gateway > machine just as a hop and there is a machine behind the gateway I get > a different pattern > > youtube->me http cont seq 4344 next seq 5792 > me->youtube tcp ack seq 5792 > youtube->me http cont seq 7240 next seq 8688 > me->youtube dup ack seq 5792 > youtube->me http cont seq 10136 next seq 11584 > me->youtube dup ack seq 5792 > youtube->me http cont seq 5790 next seq 7240 > me->youtube tcp ack seq 8688 > youtube->me http cont seq 8688 next seq 10136 > > > As you can see, in this case, it appears that some packets are being > lost and have to repeated via a dup ack. >
It appears to be frameing errors at the ethernet level. I am not sure why forwarding packets causes the problem, but the wan interface shows approx 1% of all packets have frameing errors. Does anyone know what causes them -- Alan Chandler http://www.chandlerfamily.org.uk -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
