Are you using Ubuntu or red hat? Ml2 or not ? 

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> Il giorno Jun 15, 2014, alle ore 21:08, BYEONG-GI KIM <[email protected]> 
> ha scritto:
> 
> Dear Yang, 
> 
> Thank you for the reply.
> 
> I've checked the connection between aqrouter and a vm like this way;
> 
> 1. ping from qrouter to br-ext in order to identify the external network is 
> set correctly: it works fine.
> 2. ping from a vm where locates in an internal network to a qrouter which 
> connects with the network: it doesn't work. In detail, I used tcpdump on each 
> bridge to check the connection status. The ping (ICMP Request message) 
> arrived at br-int/br-tun on the Compute Node successfully. The ping, however, 
> could not arrive at br-int/br-tun on the Network Node. The Request messsage 
> could arrive at the Ethernet port for Internal Network on the Network Node. I 
> also checked the connection by a reverse way; The ping from qrouter even 
> could not be delivered to br-int on the Network Node. Of course I set up the 
> firewall rule properly... 
> 
> My Networking set up is GRE and I deployed my openstack testbed environment 
> using VMware workstation. I've been trying to deploy two external networks 
> using multiple l3 agents, and the multiple l3 agents are running on same node 
> (Network Node). The status of the router_interface for connection between 
> Internal Network and the corresponding qrouter is shown as DOWN on dashboard. 
> 
> I don't know how to solve this problem. I tried to re-create external 
> network/subnet/qrouter according to the 
> http://www.gossamer-threads.com/lists/openstack/dev/36353?do=post_view_flat, 
> but still doesn't work.
> 
> Should the router_id in l3-agent.ini file indicate id which can find 'ip 
> netns' on Network Node or indicate id which can find 'neutron router-list' on 
> Controller Node? As you know, the ids are a little different; qrouter-xxxx or 
> just xxxx
> 
> Anyway, the setting up multiple external networks makes me upset now. :(
> 
> Best regards
> 
> Byeong-Gi Kim
> 
> 
> 
> 
> 2014-06-16 11:11 GMT+09:00 Alex Yang <[email protected]>:
>> Hi Kim,
>> 
>> You should check the firewall rule of the vm at first. Then, If the qrouter 
>> and vm are not in the same host, you should check the connection of tunnel 
>> between the two host by using ovs-vsctl show. 
>> Using tcpdump to inspect the packets in br-ext, br-int is also useful.
>> 
>> 
>> 
>> 2014-06-13 14:51 GMT+08:00 BYEONG-GI KIM <[email protected]>:
>>> Hello.
>>> 
>>> I created two external networks using multiple l3 agents by referring to 
>>> both 
>>> http://docs.openstack.org/admin-guide-cloud/content/adv_cfg_l3_agent_multi_extnet.html
>>>  and https://answers.launchpad.net/neutron/+question/236230, and it seems 
>>> work fine...
>>> 
>>> When I tried to ping from a qrouter, which connects with both an external 
>>> network called "external1" and an internal network, to a vm where located 
>>> in the internal network, however, the ping could not be sent successfully.
>>> 
>>> The qrouter can ping to br-ex, and another qrouter which connects with the 
>>> second external network named "external2" also can ping to br-ex-2. The 
>>> problem is that status for connection between each qrouter and internal 
>>> network has been "DOWN" instead of "ACTIVE"...
>>> 
>>> Did anybody suffer from such problem and solve it? I'd appreciate any help 
>>> and comments for solving it.
>>> 
>>> Thanks in advance.
>>> 
>>> Best regards
>>> 
>>> Byeong-Gi KIM
>>> 
>>> 
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>> 
>> 
>> 
>> -- 
>>   杨雨
>>   Email:       [email protected]
>> GitHub:       https://github.com/AlexYangYu
>>  Weibo:       http://www.weibo.com/alexyangyu
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