ERROR : [ipv6_set_default_route] Given IPv6 default device 'eth0' requires an

[tuxi]

Hi friends, I have a server where I need to set IPv6, I have given IPv6 address as given by provider in
/etc/sysconfig/network-scripts/ifcfg-eth0
But when I restart network, it gives following error:

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# service network restart
Shutting down interface eth0:                              [  OK  ]
Shutting down interface venet0:  Shutting down interface venet0:
                                                           [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:  Determining if ip address 218.100.225.61 is already in use for device eth0...
ERROR    : [ipv6_set_default_route] Given IPv6 default device 'eth0' requires an explicit nexthop
                                                           [  OK  ]
Bringing up interface venet0:  Bringing up interface venet0:
Configuring interface venet0:
net.ipv4.conf.venet0.send_redirects = 0
Configuring ipv6 venet0:
                                                           [  OK  ]

This is centos 6.5 with openvz virtulization. And when I use ping to check ipv6:

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# ping6 ipv6.google.com
PING ipv6.google.com(ord08s09-in-x03.1e100.net) 56 data bytes
64 bytes from ord08s09-in-x03.1e100.net: icmp_seq=1 ttl=53 time=93.2 ms
64 bytes from ord08s09-in-x03.1e100.net: icmp_seq=2 ttl=53 time=93.1 ms
64 bytes from ord08s09-in-x03.1e100.net: icmp_seq=3 ttl=53 time=93.1 ms
64 bytes from ord08s09-in-x03.1e100.net: icmp_seq=4 ttl=53 time=93.2 ms
--- ipv6.google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3367ms
rtt min/avg/max/mdev = 93.141/93.185/93.244/0.308 ms

So IPv6 is working, but then what is that error all about ?