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I agree, with Neil, 

but a few things you want to check..
1) is the network internal or external?
2) if internal, the port is created you may want to see neutron port-list
2.1 neutron agent-list  and see if those are running
2.2 go into the compute where the VM is running and check if the agent is running there, also check the master and see if that is working
3 do ip netns exec on your qrouter-xxxx-xxx and see if the router can reach the dhcp server (ping etc)
4 do a tcpdump on the ip netns exec qrouter-xxxxx and see if data is coming through. 

I am not sure if this is a multinode or all in one but if it’s all in one check the dhcp logs in the /var/log/neutron  or do less /var/log/neutron/*.log and try to get an ip address again as Neil suggested, if this is a cirros image you need to do sudo -i then ifdown eth0 and ifup eth0. Also if you do not get an ip address you can try to set it with ifconfig eth0 yournetwork/24 and then add a route to it and see if you can ping the dhcp server or the router. 


Hopefully this help. 

Remo  
> On Sep 29, 2015, at 09:05, Neil Jerram <Neil.Jerram at metaswitch.com> wrote:
> 
> Hi Venkatesh, 
> 
> OK, so does the instance get an IP address if you log into it‎ and tell it to send a new DHCP request? This is normally done by
> 
>     dhclient eth0 
> 
> or
> 
>     ifdown eth0; ifup eth0 
> 
> but it can depend on what the guest OS is.
> 
> ‎If the guest _does_ then get its IP, I suppose the problem was to do with timing when the instance first booted. 
> 
> If it doesn't, my next step would be to look in syslog on the network node, to see if the DHCP request is reaching Dnsmasq there, and how Dnsmasq responds to it.
> 
> Regards, 
>      Neil 
> 
> 
> From: venkatesh kotipalli
> Sent: Tuesday, 29 September 2015 04:50
> To: Neil Jerram
> Cc: Openstack at lists.openstack.org
> Subject: Re: [Openstack] Neutron
> 
> Hi Neli,
> 
> The DHCP agent is running  good.
> 
> 
> In controller node: 
> <image.png>
> 
> Dashboard :
> <image.png>
> 
> Login to the instance and run the command is ifconfig
> <image.png>
> 
> Thank you,
> Venkatesh.k
> 
> 
> 
> On Mon, Sep 28, 2015 at 5:27 PM, Neil Jerram <Neil.Jerram at metaswitch.com <mailto:Neil.Jerram at metaswitch.com>> wrote:
> Hi Venkatesh,
> 
> No IP probably means that the DHCP mechanism failed somehow.  Are you running a DHCP agent?
> 
>         Neil
> 
> 
> From: venkatesh kotipalli [mailto:openstackvenkatesh at gmail.com <mailto:openstackvenkatesh at gmail.com>]
> Sent: 28 September 2015 10:01
> To: Openstack at lists.openstack.org <mailto:Openstack at lists.openstack.org>
> Subject: [Openstack] Neutron
> 
> Hi All,
> 
> I have Launch the instance and finally instance status is active. After login the instance run the command is ifconfig. I have noticed there is no ip.
> 
> Please guys help me.
> 
> Thank you,
> Venkatesh.k   
> 
> 
> 
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