[Xen-users] Network down after /etc/xen/scripts/network-bridge

["Marc A. Müller" <xen17@xxxxxxxxxx>]

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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