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one node lost network gateway after enabling cluster with 2 nodes (proxmox 2.3)

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hello all,
i'm new to proxmox. I installed 2 machnies with v2.3-12/ad9c5c05. The 2 machnies worked correctly, with VMs OpenVZ. Then i configured the cluster, and did a VM migration from node1 to node2 without trouble.
Now, i noticed that node2 lost the route:
Code:

root@node2:~# route -n
Kernel IP routing table
Destination    Gateway        Genmask        Flags Metric Ref    Use Iface
192.168.64.0    0.0.0.0        255.255.255.0  U    0      0        0 vmbr0
root@node2:~# apt-get update
Err http://security.debian.org squeeze/updates Release.gpg
  Cannot initiate the connection to security.debian.org:80 (212.211.132.32). - connect (101: Network is unreachable) [IP: 212.211.132.32 80]

but the router is ok:
Code:

root@node2:~# ping 192.168.64.1
PING 192.168.64.1 (192.168.64.1) 56(84) bytes of data.
64 bytes from 192.168.64.1: icmp_req=1 ttl=255 time=1.19 ms
64 bytes from 192.168.64.1: icmp_req=2 ttl=255 time=0.491 ms

and the other node:
Code:

root@node1:~# route -n
Kernel IP routing table
Destination    Gateway        Genmask        Flags Metric Ref    Use Iface
192.168.64.164  0.0.0.0        255.255.255.255 UH    0      0        0 venet0
192.168.64.0    0.0.0.0        255.255.255.0  U    0      0        0 vmbr0
0.0.0.0        192.168.64.1    0.0.0.0        UG    0      0        0 vmbr0

Anybody can help?

thanks in advance,

gerard

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