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xen-users
Re: [Xen-users] Network down after /etc/xen/scripts/network-bridge
The almighty "ethtool -K eth0 tx off" ;)
----- Original Message -----
From: "Marc A. Müller" <xen17@xxxxxxxxxx>
To: xen-users@xxxxxxxxxxxxxxxxxxx
Sent: 07 September 2007 15:55:10 o'clock (GMT+0100) Europe/Berlin
Subject: [Xen-users] Network down after /etc/xen/scripts/network-bridge
Hi,
I'm trying to install XEN 3.1.0 on a OpenSUSE 10.2 server (self configured
kernel 2.6.18).
My XenU-kernel is booting. After starting "xend start", my network is down:
Neither I can reach other hosts, nor is the server reachable from other
hosts.
Here is the output from "ifconfig" and "route -n" BEFORE starting "xend"
(the network address is replaced by AAA.BBB.CCC):
**********************************************************************
**********************************************************************
eth0 Protokoll:Ethernet Hardware Adresse 00:19:D1:02:FA:4D
inet Adresse:AAA.BBB.CCC.58 Bcast:AAA.BBB.CCC.255
Maske:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1251 errors:0 dropped:0 overruns:0 frame:0
TX packets:629 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 Sendewarteschlangenlänge:1000
RX bytes:125722 (122.7 Kb) TX bytes:202013 (197.2 Kb)
Basisadresse:0x20e0 Speicher:50200000-50220000
lo Protokoll:Lokale Schleife
inet Adresse:127.0.0.1 Maske:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:12 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 Sendewarteschlangenlänge:0
RX bytes:1218 (1.1 Kb) TX bytes:1218 (1.1 Kb)
Kernel IP Routentabelle
Ziel Router Genmask Flags Metric Ref Use
Iface
AAA.BBB.CCC.0 0.0.0.0 255.255.255.0 U 0 0 0
eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 AAA.BBB.CCC.1 0.0.0.0 UG 0 0 0
eth0
**********************************************************************
**********************************************************************
And here is the output from "ifconfig" and "/etc/xen/scripts/network-bridge
status" AFTER starting "xend":
eth0 Link encap:Ethernet HWaddr 00:19:D1:02:FA:4D
inet addr:AAA.BBB.CCC.58 Bcast:AAA.BBB.CCC.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:370 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:20701 (20.2 Kb) TX bytes:1260 (1.2 Kb)
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:9 errors:0 dropped:0 overruns:0 frame:0
TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:894 (894.0 b) TX bytes:894 (894.0 b)
peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST NOARP MTU:1500 Metric:1
RX packets:3680 errors:0 dropped:0 overruns:0 frame:0
TX packets:295 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:384634 (375.6 Kb) TX bytes:38613 (37.7 Kb)
Base address:0x20e0 Memory:50200000-50220000
vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:30 errors:0 dropped:0 overruns:0 frame:0
TX packets:370 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1260 (1.2 Kb) TX bytes:20701 (20.2 Kb)
xenbr0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:148 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:10816 (10.5 Kb) TX bytes:0 (0.0 b)
============================================================
4: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue
link/ether 00:19:d1:02:fa:4d brd ff:ff:ff:ff:ff:ff
inet AAA.BBB.CCC.58/24 brd AAA.BBB.CCC.255 scope global eth0
11: xenbr0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
bridge name bridge id STP enabled interfaces
xenbr0 8000.feffffffffff yes vif0.0
peth0
AAA.BBB.CCC.0/24 dev eth0 proto kernel scope link src AAA.BBB.CCC.58
169.254.0.0/16 dev eth0 scope link
127.0.0.0/8 dev lo scope link
default via AAA.BBB.CCC.1 dev eth0
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
AAA.BBB.CCC.0 0.0.0.0 255.255.255.0 U 0 0 0
eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 AAA.BBB.CCC.1 0.0.0.0 UG 0 0 0
eth0
============================================================
As far as I can see, everything seems to be correct, isn't it?
I set all IPTABLES-policies to "ACCEPT" and switched on the forwarding, but
the network remains down.
The server is part of a university network with very restrictive rules. I
think only traffic from registered network cards (MAC registered) is
accepted.
Can this make trouble?
But the MAC is transferred correctly in my example?
Could it be a wrong kernel configuration?
Has to newly created eth0 to be a port of xenbr0 (it's not yet)?
If not, how can I reach the bridge (and the outside world), I can see no
routing to it?
Or is eth0 connected with vif0.0?
I'm new in bridges and Xen, so please be patient :-)
The documentation I read doesn't cover these (for newbies like me)
Thank You for Your time,
Marc Mueller
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