Open Stack

> -----Original Message-----
> From: Satish Patel [mailto:satish.txt at gmail.com]
> Sent: Wednesday, September 7, 2016 1:10 PM
> To: openstack <openstack at lists.openstack.org>
> Subject: [Openstack] dual interface instance not getting IP from DHCP after
> reboot
> 
> 
> but today i have added one more interface on instance eth1 which is not
> getting IP address itself when i reboot VM. I need to run following
> command to get IP
> 
> vm# dhclient eth1
> 
> is that normal?
[Kaustubh] It would depend on the image. I presume you are using pre-built cloud images? Ubuntu Trusty cloud image for example, only configures the first network interface to ask IP address via DHCP. If you want to have another interface query for IP address, you need to have that configuration existing in the image. If you look at /etc/network/interfaces file, it includes *.cfg files within /etc/network/interfaces.d directory. The file eth0.cfg for example, would have something like this:
auto eth0
iface eth0 inet dhcp
You could create eth1.cfg on similar lines. If you are using CentOS or RedHat image, the relevant files would be under /etc/sysconfig/network-scripts/.
 
Hope this helps.


-Kaustubh

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