Hello,
We've deployed a Sles 9 on S390X architecture using vswitch on the VM side.
When preforming kernel upgrade to kernel-s390x-2.6.5-7.139 from
kernel-s390x-2.6.5-7.111.30, we lose network connectivity.
The eth0 interface is up and running, routing table seems to be in order and
yet there's no reply when pinging the GW, when pinging the static IP of the
machine's own eth0 I/F there is a reply.

Taken steps to diagnose the problem:
0. Checked boot.msg log for errors: nothing suspicious and there are no
error messages.
1. Restarted  network service - service goes down and up again just fine and
without error messages and still there's no reply when pinging the GW.
2. Made sure iptables is not running.

After all of the above we downgraded the kernel back to
kernel-s390x-2.6.5-7.111.30 and all was fine after reboot.
We compared running modules before and after the upgrade and found no diff
between them.

Other kernels we tried with no success:
kernel-s390x-2.6.5-7.201
kernel-s390x-2.6.5-7.202.5
kernel-s390x-2.6.5-7.202.7

Attaching dmesg and lsmod output
We're pretty stuck here because we have to run some tests on these versions
and can not do so because we have no network.
The wierd part is that some kernels work and some don't without any
configuration changes we even went over the kernel changelogs and found
nothing...

thanks for any help or ideas...

best regards
Lior

--
Peace Love and Penguins -
Lior Kesos

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