WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

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

To: <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-users] Network-problems with multiple(16) virtual machines
From: "Rustedt, Florian" <Florian.Rustedt@xxxxxxxxxxx>
Date: Wed, 5 Nov 2008 17:20:41 +0100
Delivery-date: Wed, 05 Nov 2008 08:21:20 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Ack/YnIjzmy5KcggR0e0l6zUcu29HQ==
Thread-topic: Network-problems with multiple(16) virtual machines
Hello list,

I am doing my first tests with xen-3.3.0 on gentoo and am now running
against an unprotocolled limit?

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?

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?

Via google i found the hint for changing "nloopbacks", but this didn't
help either?

As you can see in dmesg, i added the options (all modules are builtin).
In ifconfig, there are 16 vifs' listed.

Anybody can help? Downwards i added dmesg, ifconfig and grub-config..

Kind regards, Florian

Dmesg:
--------------------------------
Linux version 2.6.21-xen (root@XEN0) (gcc version 4.1.2 (Gentoo 4.1.2
p1.0.2)) #4 SMP Tue Nov 4 11:24:23 CET 2008
Command line: root=/dev/sda1 console=tty0 loopback.nloopbacks=255
nloopbacks=255 max_loop=255
[...]
--------------------------------

# 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
--------------------------------

Grub-config:
--------------------------------
root (hd0,0)
title           Xen 3.3.0 kernel 2.6.21-xen
kernel          /boot/xen-3.3.0.gz
module          /boot/vmlinuz-2.6.21-xen root=/dev/sda1 console=tty0
loopback.nloopbacks=255 nloopbacks=255 max_loop=255
**********************************************************************************************
IMPORTANT: The contents of this email and any attachments are confidential. 
They are intended for the 
named recipient(s) only.
If you have received this email in error, please notify the system manager or 
the sender immediately and do 
not disclose the contents to anyone or make copies thereof.
*** eSafe scanned this email for viruses, vandals, and malicious content. ***
**********************************************************************************************


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

<Prev in Thread] Current Thread [Next in Thread>