aehusain@buffalo.edu
2009-Mar-12 20:25 UTC
[Xen-users] Netwroking on Dom0 stopped working after installing cpufreq module!
Dear All,
I am trying to set Xen Virtualization environment on a AMD Opteron
system with Fedora Core 2.6.21-7 kernel. I was able to install Xen
successfully and establish a network using Xen Bridge Configurations
using few DomU running on it. After that I tried to install
cpufrequtils 002 to be installed on Dom0. As a result of that my Dom0
networked is all messed up, my "eth0" is no more getting configured at
boot time and my iptables is also not gettings et up. I am able to
access external network and web by explicitly doing "ifup eth0" on
Dom0 but an attempt to add "xenbr0" bridge to eth0 by "brctl
addif
xenbr0 eth0" adds xenrb0 successful (as seen by "route" command)
but
it disables the network on Dom0. In all cases my VMs DomU''s are not
connected to network even after doing all this. I tried to restore
iptables by "iptables -L" but command does not return.
The output from ifconfig on Dom0:
# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:3346 errors:0 dropped:0 overruns:0 frame:0
TX packets:3346 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:22432208 (21.3 MiB) TX bytes:22432208 (21.3 MiB)
tmpbridge Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:128.205.39.118 Bcast:128.205.39.255
Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:35 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:8975 (8.7 KiB)
virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:4411 (4.3 KiB)
xenbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:4527 (4.4 KiB)
After "ifup eth0"
[root@steelbug ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:E0:81:58:BF:2A
inet addr:128.205.39.118 Bcast:128.205.39.255
Mask:255.255.255.0
inet6 addr: fe80::2e0:81ff:fe58:bf2a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1698 errors:0 dropped:0 overruns:0 frame:0
TX packets:1715 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1041847 (1017.4 KiB) TX bytes:309166 (301.9 KiB)
Interrupt:22 Base address:0x4000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:3346 errors:0 dropped:0 overruns:0 frame:0
TX packets:3346 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:22432208 (21.3 MiB) TX bytes:22432208 (21.3 MiB)
tmpbridge Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:128.205.39.118 Bcast:128.205.39.255
Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:35 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:8975 (8.7 KiB)
virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:4411 (4.3 KiB)
xenbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:4527 (4.4 KiB)
debug messages from DomU (i.e. ubuntu.8-04 hardy)
root@ubuntu-pristine:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:3e:5b:94:cf
inet addr:128.205.39.150 Bcast:128.205.39.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15 errors:0 dropped:0 overruns:0 frame:0
TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4177 (4.0 KB) TX bytes:570 (570.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
I have not modified any defaults setting in /etc/sysconfig/network*
folders. Please help what can have went wrong and what measure are
needed to restore the dom0 defaults network setting. I have tried to
uninstall the fc7xen kernel using "yum groupremove
"Virtualization""
and again install Xen using "yum groupinstall
"Virtualization"" but
still nothing has changed.
Moreover cpufreq is also not working and giving following error
[root@steelbug ~]# cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
Please suggest the changes to make this two things working!
Thanks & Regards!
Ata E Husain Bohra
Student - CSE Department
University at Buffalo,
New York
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