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[Xen-users] xen-3.0-testing: checksum errors (was: still checksum errors

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Subject: [Xen-users] xen-3.0-testing: checksum errors (was: still checksum errors with xen-3.0-testing.hg)
From: Markus Schuster <ma.schuster@xxxxxx>
Date: Sun, 30 Apr 2006 22:02:07 +0200
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Hi list,
hi Nivedita Singhvi,

you wrote one should post to the mailing list if turning offloading off
still helps against checksum errors in recent checkouts. I had this
problem with a snapshot of xen-unstable from 2006-03-29 and upgraded
this days to a snapshot of xen-3.0-testing from 2006-04-29 (changeset
9659:50f2558d6241 regarding to xm dmesg output). Well, I still have
checksum problems that go away when turning offloading off vith ethtool.

I use the more-or-less classical networking environment: Bridging in
dom0, some VLANs, an eth0.X and a bridge for each VLAN ("handmade" using
Debian's /etc/network/interfaces) and the domUs connected to the
corresponding bridge. One domU acts as a router and has an interfaces
for each bridge (it'll really have an interface for each VLAN if XEN
will support more than three interfaces per domU... *hint* :))

But maybe a 'brctl show' says more than 1000 words:
brmgnt                  8000.feffffffffff       no              peth0
brvlan101               8000.0002b3c76e13       no              eth0.101
brvlan110               8000.0002b3c76e13       no              eth0.110
brvlan111               8000.0002b3c76e13       no              eth0.111
brvlan120               8000.0002b3c76e13       no              eth0.120

(brmgnt is the same NIC, but untagged).

And finally some 'xm info' output:
host                   : dom0
release                :
version                : #1 SMP Sat Apr 29 20:22:56 CEST 2006
machine                : i686
nr_cpus                : 2
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 1
threads_per_core       : 1
cpu_mhz                : 1666
hw_caps                : 0383fbff:c1cbfbff:00000000:00000020
total_memory           : 1536
free_memory            : 296
xen_major              : 3
xen_minor              : 0
xen_extra              : .2-2
xen_caps               : xen-3.0-x86_32
platform_params        : virt_start=0xfc000000
xen_changeset          : Fri Apr 28 14:06:33 2006 +0100 9659:50f2558d6241
cc_compiler            : gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)
cc_compile_by          : xenod
cc_compile_domain      : cl.cam.ac.uk
cc_compile_date        : Sat Apr 29 02:03:24 BST 2006


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