Re: [coLinux-users] Invalid checksums

[Paradise <par...@gm...>]

yes, i did try disabling it but same result

On Sun, 10 Oct 2004 19:16:44 +0100, peter green <plu...@bi...> wrote:
> did you try disabling checksum offload?
> 
> its the only thing that is currently known to cause problems with winpcap
> based bridging
> 
> 
> 
> > -----Original Message-----
> > From: col...@li...
> > [mailto:col...@li...]On Behalf Of Paradise
> > Sent: 10 October 2004 19:02
> > To: Xavier Brouckaert
> > Cc: col...@li...
> > Subject: Re: [coLinux-users] Invalid checksums
> >
> >
> > Hi, my case is same with you, with same network card and bridged
> > connection, cannot ssh to colinux from host but my other pc on the
> > network has no problem at all.
> >
> >
> > On Sat, 9 Oct 2004 20:31:33 +0200, Xavier Brouckaert
> > <xav...@gm...> wrote:
> > > Hi,
> > >
> > > I'm running CoLinux 0.6.2 on Windows 2000 SP4 to run a Debian image.
> > > I've got invalid checksums which makes impossible to run an ssh
> > > session between the host and colinux.  I'm using a bridged ethernet
> > > connection.
> > >
> > > My configuration is :
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <colinux>
> > >     <block_device index="0"
> > > path="\DosDevices\e:\colinux\Debian-20040605-mit.ext3.1610mb"
> > > enabled="true" />
> > >     <block_device index="1" path="\DosDevices\e:\colinux\swap_512Mb"
> > > enabled="true"></block_device>
> > >     <bootparams>root=/dev/cobd0</bootparams>
> > >     <image path="vmlinux" />
> > >     <memory size="128" />
> > >     <!--  <network index="0" type="tap" /> -->
> > >     <network index="0" type="bridged" name="Marvell" />
> > > </colinux>
> > >
> > > A sample tethereal trace (host=192.168.1.100, colinux=192.168.1.102)
> > > of a putty ssh connection:
> > > No.     Time        Source                Destination
> > Protocol Info
> > >       3 0.008588    192.168.1.100         192.168.1.102         TCP
> > >   1163 > 22 [SYN] Seq=0 Ack=0 Win=65535 Len=0 MSS=1460
> > >       4 0.008769    192.168.1.100         192.168.1.102         TCP
> > >   1163 > 22 [SYN] Seq=0 Ack=0 Win=65535 Len=0 MSS=1460
> > >       5 0.023884    192.168.1.102         192.168.1.100         TCP
> > >   22 > 1163 [SYN, ACK] Seq=0 Ack=1 Win=5840 Len=0 MSS=1460
> > >       6 0.023902    192.168.1.100         192.168.1.102         TCP
> > >   1163 > 22 [ACK] Seq=1 Ack=1 Win=65535 [CHECKSUM INCORRECT] Len=0
> > >       7 0.024081    192.168.1.100         192.168.1.102         TCP
> > >   [TCP Dup ACK 6#1] 1163 > 22 [ACK] Seq=1 Ack=1 Win=65535 Len=0
> > >       8 0.024373    192.168.1.102         192.168.1.100         TCP
> > >   22 > 1163 [SYN, ACK] Seq=0 Ack=1 Win=5840 Len=0 MSS=1460
> > >       9 0.024387    192.168.1.100         192.168.1.102         TCP
> > >   1163 > 22 [ACK] Seq=1 Ack=1 Win=65535 [CHECKSUM INCORRECT] Len=0
> > >      10 0.024564    192.168.1.100         192.168.1.102         TCP
> > >   [TCP Dup ACK 9#1] 1163 > 22 [ACK] Seq=1 Ack=1 Win=65535 Len=0
> > >
> > > As you can see, there are some packets with an invalid checksum and
> > > others with a valid checksum.
> > >
> > > The network card is a "Marvell Yukon Gigabit Ethernet
> > > 10/100/1000Base-T Adapter, Copper RJ-45" running at 100Mbps.
> > >
> > > It only happens between the host and colinux.  On colinux, I can
> > > flawlessly install packages and so on...
> > >
> > > Any idea why it happens ?
> > >
> > > Thank you,
> > > Xavier Brouckaert
> > >
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> >
> >
> > --
> > Regards,
> > Paradise
> >
> >
> > -------------------------------------------------------
> 
> 
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> 


-- 
Regards,
Paradise