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xen-users
[Xen-users] bridge networking issue from dom0 to the world
Hi,
I'm trying to setup xen and have figured out most of my issues. However I'm
stuck with a networking issue.
From my dom0 I can ping the world and my domU. However I cannot ping anything
except the dom0 from inside my domU.
dom0 is a clean opensuse 11.4 with XEN 4.1.1 added to it (using the default
kernel 2.6.37.6-0.5-xen).
domU is ubuntu server 8.04 with all recent updates (and using the kernel
above).
I've manually setup the xen cfg for my domU (xen-create-tool was not available
on SuSE and I could not seem to get virt-manager to do what I wanted - or made
sence of it :( ).
After starting up domU the dom0 config looks like :
# ifconfig
br0 Link encap:Ethernet HWaddr <MAC>
inet addr:x.y.z.117 Bcast:x.y.z.127 Mask:255.255.255.224
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1166 errors:0 dropped:0 overruns:0 frame:0
TX packets:733 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:85307 (83.3 Kb) TX bytes:112363 (109.7 Kb)
eth0 Link encap:Ethernet HWaddr <MAC>
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1133 errors:0 dropped:0 overruns:0 frame:0
TX packets:828 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:100941 (98.5 Kb) TX bytes:117725 (114.9 Kb)
Interrupt:230 Base address:0x8000
vif2.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:22 errors:0 dropped:0 overruns:0 frame:0
TX packets:41 errors:0 dropped:4 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:1296 (1.2 Kb) TX bytes:2718 (2.6 Kb)
vif2.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:43 errors:0 dropped:4 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:0 (0.0 b) TX bytes:2886 (2.8 Kb)
# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.4061862a1fa4 no eth0
vif2.0
vif2.1
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
x.y.z.97 0.0.0.0 255.255.255.255 UH 0 0 0 eth0
x.y.z.96 0.0.0.0 255.255.255.224 U 0 0 0 br0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 x.y.z.97 0.0.0.0 UG 0 0 0 br0
# cat /etc/sysctl.conf
net.ipv4.ip_forward=1
net.ipv4.conf.all.rp_filter=1
net.ipv4.icmp_echo_ignore_broadcasts=1
# cat /etc/xen/xend-config.sxp | grep -v <empty lines and comments>
(xend-http-server yes)
(xend-unix-server yes)
(xend-unix-path /var/lib/xend/xend-socket)
(xend-port 8000)
(xend-address localhost)
(xend-relocation-hosts-allow '^localhost$ ^localhost\\.localdomain$')
(network-script 'network-bridge bridge=br0')
(vif-script vif-bridge)
(dom0-min-mem 512)
(enable-dom0-ballooning yes)
(total_available_memory 0)
(dom0-cpus 0)
The dom0 has no iptables rules active.
Finally the domU looks like :
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
x.y.z.96 0.0.0.0 255.255.255.224 U 0 0 0 eth0
0.0.0.0 x.y.z.97 0.0.0.0 UG 100 0 0 eth0
0.0.0.0 x.y.z.117 0.0.0.0 UG 100 0 0 eth0
#ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:.....
inet addr:x.y.z.125 Bcast:x.y.z.127 Mask:255.255.255.224
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:54 errors:0 dropped:0 overruns:0 frame:0
TX packets:75 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3644 (3.5 KB) TX bytes:5975 (5.8 KB)
Thanks for any pointers or insights you may have.
CPH
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