[Xen-users] Xen, CentOS5 and route setup

[Sven Falk <xenusers@xxxxxxxxxx>]

Hi,

I'm trying to get Xen in a route setup with CentOS5 both as dom0 and  
domU running. Bridge setup was working.
dom0
ip: 88.xxx.xx.151/27
gw: 88.xxx.xx.129

domU:
ip: 78.xx.xxx.114/32



dom0 ifconfig:

eth0      Link encap:Ethernet  HWaddr 00:E0:4D:05:AA:70
          inet addr:88.xxx.xx.151  Bcast:88.xxx.xx.159  Mask:255.255.255.224
          inet6 addr: fe80::2e0:4dff:fe05:aa70/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:39303 errors:0 dropped:0 overruns:0 frame:0
          TX packets:34352 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:14998793 (14.3 MiB)  TX bytes:17027615 (16.2 MiB)
          Interrupt:18 Base address:0x4000

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:70551 errors:0 dropped:0 overruns:0 frame:0
          TX packets:70551 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:7669877 (7.3 MiB)  TX bytes:7669877 (7.3 MiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet addr:88.xxx.xx.151  Bcast:88.xxx.xx.151  Mask:255.255.255.255
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:384 errors:0 dropped:0 overruns:0 frame:0
          TX packets:52 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:32
          RX bytes:69484 (67.8 KiB)  TX bytes:4881 (4.7 KiB)

dom0 route:

78.xx.xxx.114 dev vif1.0  scope link  src 88.xxx.xx.151
88.xxx.xx.128/27 dev eth0  proto kernel  scope link  src 88.xxx.xx.151
default via 88.xxx.xx.129 dev eth0

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
78.xx.xxx.114   0.0.0.0         255.255.255.255 UH    0      0        0 vif1.0
88.xxx.xx.128   0.0.0.0         255.255.255.224 U     0      0        0 eth0
0.0.0.0         88.xxx.xx.129   0.0.0.0         UG    0      0        0 eth0

domU config:
# Automatically generated xen config file
...
vif = [ 'ip=78.xx.xxx.114', ]
...

in the domU:
# Xen Virtual Ethernet
DEVICE=eth0
BOOTPROTO=static
IPADDR=78.xx.xxx.114
NETMASK=255.255.255.255
ONBOOT=yes


added
ip route add default dev eth0

manually on the domU, routing now:

ip route
default dev eth0  scope link

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0 eth0

I can ping the dom0 from the domU and vice versa. But I can't access  
internet from the domU, a traceroute always stops at the dom0 ip.
ip_forward and proxyarp for ezh0 and vif1.0 are set.

Any idea?
Sven

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