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xen-users
Re: [Xen-users] domU Networking Issues
Is IP forwarding enabled on Dom0
echo 1 > /proc/sys/net/ipv4/ip_forward
I assume it is /etc/sysctl.conf (If not then do it)
I see a problem in your brctl show output
# brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.000000000000 yes
xenbr0 8000.feffffffffff no vif2.0
vif1.0
peth0
vif0.0
is peth0 a separate bridge or included in bridge if you see the output of
of ifconfig on the dom0: from your message your peth0 is running in
PROMISC mode and it seems to be included in bridge in the brctl show
output.
I do not think that this is right when you
peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP PROMISC MTU:1500 Metric:1
Note the line PROMISC in above output peth0 is the bridge in which
remaining VM ethernets should be included in it and not in
virbr0 or xenbr0
peth0 is running in promiscous mode while xenbr0 is not.
Try to change your network topology disable the bridges which are not
required and bring rest of the VM bridges in this peth0 bridge and
remove the eth0 thing,
The IP should be assigned to your bridge unless you have separate lan
cards and different bridges attached to them.
Running more than one bridge on same lan card is not appropriate.
http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge
Following is a sample bridge configuration
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet manual
auto br0
iface br0 inet static
address 192.168.0.100
network 192.168.0.0
netmask 255.255.255.0
broadcast 192.168.0.255
gateway 192.168.0.1
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
add rest of the Virtual Machine ethernets to this bridge.
Delete the unnecessary bridges on your machine.
post route -n and what have you specified Gateway for your VMs.
Also check there are two xml files
var/lib/xend/state two files cpu.xml and host.xml are they corrupt.
Check this page
http://wiki.xensource.com/xenwiki/CoolConfigurations
http://www.debian-administration.org/articles/360
http://kbase.redhat.com/faq/docs/DOC-29713
Do they help or not let us know.
I am assuming you read this page
http://wiki.xensource.com/xenwiki/XenNetworking
Check this page
http://www.howtoforge.com/virtualization-with-kvm-on-ubuntu-8.10
for a correct ifconfig output when using a bridge.
Pastebin the logs xend.log daemon.log xen.log
--
Tapas
http://mightydreams.blogspot.com
http://wiki.xensource.com/xenwiki/Xen_on_4_app_servers
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