tftp - bad checksum error? can't transfer file

[C. P. Ghost]

On Fri, Jul 8, 2011 at 12:44 AM, Anton Shterenlikht <mexas at bristol.ac.uk> wrote:
> I'm trying to troubleshoot tftpd(8).

(...)

>    192.168.232.10.15388 > buzi.tftp: [no cksum]  25 RRQ "/bsd.rd.IP32" octet (
> o
> 23:25:21.024160 IP (tos 0x0, ttl 64, id 56, offset 0, flags [none], proto UDP (1
> 7), length 30, bad cksum 0 (->293a)!)
>    buzi.19330 > 192.168.232.10.15388: [udp sum ok] UDP, length 2
> 23:25:51.013759 IP (tos 0x0, ttl 255, id 256, offset 0, flags [none], proto UDP
> (17), length 53)

I've had some trouble netbooting / jumpstaring recently with a similar
pattern (using RARP/BOOTP/TFTP/NFS). It turned out to be a dying
port on the switch whose errors were masked by TCP in day to day
use, but alas were too frequent for UDP.

-cpghost.

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