Re: [Xen-users] Network-problems with multiple(16) virtual machines

[Stefan Bauer <stefan.bauer@xxxxxxxxxxx>]

Rustedt, Florian schrieb:
> I start 16 exactly equal domains. Each receives an IP via dhcp. Now i
> can ping dom0 (192.168.10.10) from every domU (192.168.10.100 - 115,
> names are "xen-gentoo-default10..25").
> 
> The curious thing is now, that the domains 17 and 20-25 are not able to
> reach the outer world? Nor there are log-entries concerning this?

So domain 17 brought up vif7 right?

> I tried this again for aprovement with an "ping www.yahoo.de" just to
> see that dns works. And as told before, all domU are working except
> theese seven ones?

What's the output of brctl for ehe eth0/peth0 bridge?

> # ifconfig|grep Ethernet :
> --------------------------------
> eth0      Link encap:Ethernet  HWaddr 00:21:5b:d1:a6:a7
> peth0     Link encap:Ethernet  HWaddr 00:21:5b:d1:a6:a7
> vif1.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif10.0   Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif11.0   Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif12.0   Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif13.0   Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif14.0   Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif15.0   Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif16.0   Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif2.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif3.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif4.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif5.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif6.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif7.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif8.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff
> vif9.0    Link encap:Ethernet  HWaddr fe:ff:ff:ff:ff:ff

I only see virtual interfaces of 16 domains. vif1.0 - vif16.0 you
mentioned above 17.

> module          /boot/vmlinuz-2.6.21-xen root=/dev/sda1 console=tty0
> loopback.nloopbacks=255 nloopbacks=255 max_loop=255
> **********************************************************************************************

In my documentation it's netloop.nloopbacks which should be by default
set to 8.

Regards

-- 
stefan

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