[Xen-users] Network only works for a few seconds during boot

[Alberto Alonso <sp-jf209xen@xxxxxxxxx>]

I have a machine with 12 guests. When I boot
a guest the network works for about 6 seconds
and then it is unreachable.

This is the ping status as seen by another machine
on the network:

>From cn36 (10.6.4.36) icmp_seq=21 Destination Host Unreachable
>From cn36 (10.6.4.36) icmp_seq=22 Destination Host Unreachable
>From cn36 (10.6.4.36) icmp_seq=23 Destination Host Unreachable
>From cn36 (10.6.4.36) icmp_seq=24 Destination Host Unreachable
64 bytes from 10.6.50.52: icmp_seq=25 ttl=64 time=1385 ms
64 bytes from 10.6.50.52: icmp_seq=26 ttl=64 time=376 ms
64 bytes from 10.6.50.52: icmp_seq=27 ttl=64 time=0.868 ms
64 bytes from 10.6.50.52: icmp_seq=28 ttl=64 time=0.767 ms
64 bytes from 10.6.50.52: icmp_seq=29 ttl=64 time=0.270 ms
64 bytes from 10.6.50.52: icmp_seq=30 ttl=64 time=0.317 ms
>From cn36 (10.6.4.36) icmp_seq=57 Destination Host Unreachable
>From cn36 (10.6.4.36) icmp_seq=58 Destination Host Unreachable
>From cn36 (10.6.4.36) icmp_seq=59 Destination Host Unreachable

The vps052 ethernet is properly enabled and confifured:

vps052:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:16:3E:1E:F4:C0
          inet addr:10.6.50.52  Bcast:10.6.127.255  Mask:255.255.128.0
          inet6 addr: fe80::216:3eff:fe1e:f4c0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:32 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2724 (2.6 KiB)  TX bytes:1266 (1.2 KiB)

The network bridge status doesn't report any problems and shows all
the vifs in place:

bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no              vif0.0
                                                        peth0
                                                        vif17.0
                                                        vif19.0
                                                        vif3.0
                                                        vif4.0
                                                        vif5.0
                                                        vif6.0
                                                        vif7.0
                                                        vif8.0
                                                        vif9.0
                                                        vif10.0
                                                        vif11.0
                                                        vif12.0
                                                        vif13.0
                                                        vif14.0
                                                        vif15.0
                                                        vif16.0


For dom0 the kernel is Ubuntu's: 2.6.19-4-server
For the domU the kernel is: 2.6.22-14-xen

Any ideas of what I should be looking for?

Thanks,

Alberto



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