Open Stack

Hi all,

I'm trying to deploy OpenStack environment using DevStack with latest master code.
I use Xenserver + neutron, with ML2 plugins and VLAN type.

The problem I met is that the instances cannot really get IP address (I use DHCP), although we can see the VM with IP from horizon.
I have tcpdump from VM side and DHCP server side, I can get DHCP request packet from VM side but cannot see any request packet from DHCP server side.
But after I reboot the q-agt, the VM can get IP successfully.
Checking the difference before and after q-agt restart, all my seen are the flow rules about ARP spoofing.

This is the q-agt's br-int port, it is dom0's flow rules and the bold part are new added

                NXST_FLOW reply (xid=0x4):
               cookie=0x824d13a352a4e216, duration=163244.088s, table=0, n_packets=93, n_bytes=18140, idle_age=4998, hard_age=65534, priority=0 actions=NORMAL
cookie=0x824d13a352a4e216, duration=163215.062s, table=0, n_packets=7, n_bytes=294, idle_age=33540, hard_age=65534, priority=10,arp,in_port=5 actions=resubmit(,24)
               cookie=0x824d13a352a4e216, duration=163230.050s, table=0, n_packets=25179, n_bytes=2839586, idle_age=5, hard_age=65534, priority=3,in_port=2,dl_vlan=1023 actions=mod_vlan_vid:1,NORMAL
               cookie=0x824d13a352a4e216, duration=163236.775s, table=0, n_packets=0, n_bytes=0, idle_age=65534, hard_age=65534, priority=2,in_port=2 actions=drop
               cookie=0x824d13a352a4e216, duration=163243.516s, table=23, n_packets=0, n_bytes=0, idle_age=65534, hard_age=65534, priority=0 actions=drop
               cookie=0x824d13a352a4e216, duration=163242.953s, table=24, n_packets=0, n_bytes=0, idle_age=65534, hard_age=65534, priority=0 actions=drop
cookie=0x824d13a352a4e216, duration=163215.636s, table=24, n_packets=7, n_bytes=294, idle_age=33540, hard_age=65534, priority=2,arp,in_port=5,arp_spa=10.0.0.6 actions=NORMAL

I cannot see other changes after reboot q-agt, but it seems these rules are only for ARP spoofing, however, the instance can get IP from DHCP.
I also google for this problem, but failed to deal this problem.
Is anyone met this problem before or has any suggestion about how to debugging for this?

Thanks a lot

BR//Huan
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