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my Controller Node have tow NICS use FlatDHCPManager for nova-network.

NETWORK

network_manager=nova.network.manager.FlatDHCPManager force_dhcp_release=True dhcpbridge_flagfile=/etc/nova/nova.conf firewall_driver=nova.virt.libvirt.firewall.IptablesFirewallDriver my_ip=PUBLIC_IP public_interface=eth1 vlan_interface=eth0 flat_network_bridge=br100 flat_interface=eth0 fixed_range=10.0.0.0/24 multi_host=True send_arp_for_ha=True

after recently test I found , where I delete fixed_ip

nova-manage network delete 10.0.0.0/24

then instanc launch at Node1 successfully. Tenant Host Instance Name IP Address Size Status Task Power State Actions demo Node1 winxp-Node1 512MB RAM | 1 VCPU | 0 Disk Active None Running though it hvae get fixed_ip

so when I allcote fixed ip at Control Node which run nova-network

nova-manage network create private --fixed_range_v4=10.0.0.0/24 --num_networks=1 --bridge=br100 --bridge_interface=eth0 --network_size=256 --multi_host=T

then create a new instance meets following problems:

Tenant  Host    Instance Name   IP Address  Size    Status  Task    Power State Actions
demo    Node1   winxp-Node1                       512MB RAM | 1 VCPU | 0 Disk   Error   Networking  No State    
demo    cloud   winxp-cloud        10.0.0.2        512MB RAM | 1 VCPU | 0 Disk  Active  None    Running

please see details of log

nova-network.log on Controll Node http://pastebin.com/8HBULmLP

nova-compute.log on Node1 http://pastebin.com/Ksh05duC