[Xen-users] can't ping from domU to dom0 and viceversa

["andrea15@xxxxxx" <andrea15@xxxxxx>]

I've succesfully installed xen on my fedora5 and I built up some guest 
domains.
I've assigned manually IP addresses to them, choosing from 
ones of this subnet: 10.10.232.160\28.
Now I can ping from one to 
another but I'm nor able to ping dom0 (pubblic address 143.225.229.138) 
neither ping guest domains from dom0. Pings don't give responses (no 
ICMP reports)

I tryed to use this configuration, reading some items 
from internet:
I use a dummy interface on dom0 with IP address on the 
subnet 10.10.232.160\28 (in particular 10.10.232.161) and I use this 
address as default gateway for guest domains.
Here it is the routing 
table for my guest domains:
[root@fc6_pristine ~]# route
Kernel IP 
routing table
Destination     Gateway         Genmask         Flags 
Metric Ref    Use Iface
10.10.232.160   *               255.255.255.240 
U     0      0        0 eth0
default         10.10.232.161   
0.0.0.0         UG    0      0        0 eth0

That's the routing table 
for domain0:
[root@localhost ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
10.10.232.160   *               255.255.255.240 U     0      
0        0 xenbr0
10.10.232.160   *               255.255.255.240 U     
0      0        0 dummy0
143.225.229.0   *               
255.255.255.0   U     0      0        0 eth0
169.254.0.0     
*               255.255.0.0     U     0      0        0 eth0
default         143.225.229.254 0.0.0.0         UG    0      0        0 
eth0

Finally I post also the output from ifconfig in domain0 to show 
how addresses match interfaces:
[root@localhost ~]# ifconfig
dummy0    
Link encap:Ethernet  HWaddr 96:21:5A:3E:47:11  
          inet addr:
10.10.232.161  Bcast:10.10.232.175  Mask:255.255.255.240
          
inet6 addr: fe80::9421:5aff:fe3e:4711/64 Scope:Link
          UP 
BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:0 
errors:0 dropped:0 overruns:0 frame:0
          TX packets:251 errors:0 
dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:24598 (24.0 KiB)

eth0      Link 
encap:Ethernet  HWaddr 00:0E:0C:4C:00:AB  
          inet addr:
143.225.229.138  Bcast:143.225.229.255  Mask:255.255.255.0
          
inet6 addr: fe80::20e:cff:fe4c:ab/64 Scope:Link
          UP BROADCAST 
RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8306328 
errors:0 dropped:0 overruns:0 frame:0
          TX packets:51165 errors:
0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:653975668 (623.6 MiB)  TX bytes:8489842 (8.0 MiB)

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:2399 errors:
0 dropped:0 overruns:0 frame:0
          TX packets:2399 errors:0 
dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2409520 (2.2 MiB)  TX bytes:2409520 (2.2 MiB)

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  MTU:1500  Metric:1
          RX packets:
8300832 errors:0 dropped:0 overruns:0 frame:0
          TX packets:
120277 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 
txqueuelen:1000 
          RX bytes:686128192 (654.3 MiB)  TX bytes:
13786480 (13.1 MiB)
          Base address:0xee80 Memory:feba0000-
febc0000 

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:
51165 errors:0 dropped:0 overruns:0 frame:0
          TX packets:
8306331 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 
txqueuelen:0 
          RX bytes:8489842 (8.0 MiB)  TX bytes:653975848 
(623.6 MiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:351 
errors:0 dropped:0 overruns:0 frame:0
          TX packets:8251325 
errors:0 dropped:2640 overruns:0 carrier:0
          collisions:0 
txqueuelen:0 
          RX bytes:29336 (28.6 KiB)  TX bytes:648058999 
(618.0 MiB)

vif7.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          
UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:
4887 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8194423 
errors:0 dropped:3168 overruns:0 carrier:0
          collisions:0 
txqueuelen:0 
          RX bytes:914252 (892.8 KiB)  TX bytes:642840744 
(613.0 MiB)

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          inet addr:10.10.232.160  Bcast:10.10.232.175  Mask:
255.255.255.240
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX 
packets:8002041 errors:0 dropped:0 overruns:0 frame:0
          TX 
packets:507 errors:0 dropped:0 overruns:0 carrier:0
          
collisions:0 txqueuelen:0 
          RX bytes:511413601 (487.7 MiB)  TX 
bytes:49686 (48.5 KiB)

Cuold the problem depend on how interfaces are 
attached to xenbr0 or Am I only missing something about classic 
networking configuration?
thank you in advance
Andrea Sibilia

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