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SubjectRe: slow tcp with isdn
Date
kraxel@cs.tu-berlin.de writes:
>
> 18:43:58.032845 ftp.20 > mybox.1096: P 2921:4381(1460) ack 1 win 4096
> *** I miss a ACK here
> 18:43:59.932845 ftp.20 > mybox.1096: . 2921:4381(1460) ack 1 win 4096
>
> It seems (to me) that the packages arrive here ok (else tcpdump would'nt
> see them, tcpdump runs on the linux box too). So I don't understand why
> linux does'nt ack them? Any idea? Can they get lost *after* tcpdump has
> seen them? Becauce of a bad checksum or something? How to check this?
>
Checksum. Look at the kernel syslog and/or /proc/net/snmp.


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