try default-gateway for guest 113.203.209.163
16.05.2012 19:07, Thorsten Göllner написал:
Hi,
I installed 12.04 on my host and installed a 12.04 guest under
kvm/libvirt. I setup a bridge as described here
https://help.ubuntu.com/12.04/serverguide/network-configuration.html#bridging
but my guest can not reach the internet nor other host within my local
net.
ON THE HOST:
============
~$ ifconfig
br0 Link encap:Ethernet HWaddr 00:25:90:57:02:c7
inet addr:113.203.209.163 Bcast:213.203.209.191
Mask:255.255.255.224
inet6 addr: fe80::225:90ff:fe57:2c7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5195 errors:0 dropped:0 overruns:0 frame:0
TX packets:3643 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:397189 (397.1 KB) TX bytes:2499669 (2.4 MB)
eth0 Link encap:Ethernet HWaddr 00:25:90:57:02:c7
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5417 errors:0 dropped:128 overruns:0 frame:0
TX packets:4775 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:528691 (528.6 KB) TX bytes:2591855 (2.5 MB)
Interrupt:20 Memory:fba00000-fba20000
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:5442 errors:0 dropped:0 overruns:0 frame:0
TX packets:5442 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2484575 (2.4 MB) TX bytes:2484575 (2.4 MB)
vnet0 Link encap:Ethernet HWaddr fe:54:00:d2:d1:73
inet6 addr: fe80::fc54:ff:fed2:d173/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:103 errors:0 dropped:0 overruns:0 frame:0
TX packets:875 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:7882 (7.8 KB) TX bytes:55858 (55.8 KB)
~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
0.0.0.0 113.203.209.161 0.0.0.0 UG 100 0
0 br0
113.203.209.160 0.0.0.0 255.255.255.224 U 0 0
0 br0
:~$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
~$ brctl show
bridge name bridge id STP enabled interfaces
br0 8000.0025905702c7 no eth0
vnet0
~$ sudo cat /etc/libvirt/qemu/guest.xml
[...]
<interface type='bridge'>
<mac address='52:54:00:d2:d1:73'/>
<source bridge='br0'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
[...]
ON THE GUEST:
=============
~$ ifconfig
eth0 Link encap:Ethernet HWaddr 52:54:00:d2:d1:73
inet addr:113.203.209.165 Bcast:213.203.09.191
Mask:255.255.255.224
[...]
~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
0.0.0.0 113.203.209.161 0.0.0.0 UG 100 0
0 eth0
1213.203.209.160 0.0.0.0 255.255.255.224 U 0 0
0 eth0
:~$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
My NET:
=======
host-server: 113.203.209.163
guest: 113.203.209.165
default gateway: 113.203.209.161
From the host-server I can ping all hosts and the internet. But on the
guest I can ping the host (213.203.209.163) but no other host. (TX
packets increases but no RX packets). Any idea?
Best regards,
-Thorsten-
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