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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 <kimbyeonggi at gmail.com> 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 <alex890714 at gmail.com>:
>> 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 <kimbyeonggi at gmail.com>:
>>> 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:       alex890714 at gmail.com
>> GitHub:       https://github.com/AlexYangYu
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