Re: [Xen-devel] 2.6.31.6 pv_ops and routing DomU

[Stefan Kuhne <stefan.kuhne@xxxxxxx>]

Am 09.03.2010 23:31, schrieb Konrad Rzeszutek Wilk:
> On Tue, Mar 09, 2010 at 11:16:15PM +0100, Stefan Kuhne wrote:
>> Hello,
>>
>> i try to use xen-4.0.0-rcx with linux-2.6.31.6 pv_ops Dom0 Kernel.
>>
>> I've a DomU as DSL Router with pppoe.
>> My Hardware has only one NIC, so i have to use it for LAN and pppoe to
>> my DSL Modem.
> 
> Your DomU goes to the Internet. You Dom0 hooks up to the rest of your
> LAN. You want Dom0 and DomU to route packets back and forth, right?
> 
Sorry, but my english isn't got enough for this.
My DomU makes NAT and all stuff.

>> My Problem is, that only this DomU and the Dom0 has Internet.
> 
> I presume you have your Dom0 NIC in a bridge which has the vif for the
> DomU.
> 
Yes.

>> All others have DNS but ping doesn't work.
> 
> Can you ping your DomU from your LAN? That _should_ work.

Yes, this works for other DomUs and real PC in my LAN.

>> I can't find anythink in any log file.
> 
> Go to wireshark website and watch the videos on how to use it. Your
> problem is network related.

But on which interface.
I can try it when i can disconnect Internet.

>> Anyone an idea?
> 
> I think your DomU routing is not set properly. Look online for tutorials
> on NAT/Masquarade/firewall. Make sure you have 
> echo 1 > /proc/sys/net/ipv4/ip_forward
> 
When i use xen-4.0.0-rc2 with an old Dom0 kernel all works fine.
When i boot 2.6.31.6 pv_ops i've my problem.

On another System with two NICs (second is passthrough) all Kernel works
fine.

Regards,
Stefan Kuhne

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