OpenVzのIPアドレス割り当てに失敗するとき

# vzctl start 101
Starting container ...
Container is mounted
Adding IP address(es): 192.168.30.201
arpsend: 192.168.30.201 is detected on another computer : 00:24:e8:69:35:e0
vps-net_add WARNING: arpsend -c 1 -w 1 -D -e 192.168.30.201 vmbr0 FAILED
Setting CPU units: 1000
Setting CPUs: 1
Container start in progress...

# arp -d 192.168.30.201
192.168.30.201のARPエントリがありません

# vzctl stop 101
Stopping container ...
Container was stopped
Container is unmounted

# arp -a
? (192.168.30.1) at 00:11:38:13:c3:12 [ether] on vmbr0
? (192.168.30.201) at 00:24:e8:69:35:e0 [ether] on vmbr0
? (192.168.30.201) at <from_interface> PERM PUB on vmbr0

# ping 192.168.30.201
PING 192.168.30.201 (192.168.30.201) 56(84) bytes of data.
64 bytes from 192.168.30.201: icmp_req=1 ttl=64 time=0.633 ms
^C

IPがかぶっている？？
別のIPを割り当てて解決。