[Rdo-list] networking issues on JUNO redhead openstack.

[Kashyap Chamarthy]

On Fri, Jan 09, 2015 at 09:22:04PM +0000, Ns, Rushi wrote:
> Hi Support,

[A gentle note: addresing community mailing lists as "Support" is not a
nice netiquette.]

That said, a couple of comments in line.

> I have  a problem that a launched instance  from openstack cannot connect to SSH or PING
> 
> First of all I have dump question whether my system should be NOVA
> network or Neutron network.

If you mean, you're not sure whether to choose Nova or Neutron
networking, it really depends what you're trying to do. Just to note,
Nova networking will be deprecated in future in favor of Neutron, so
getting familiar with Neutron will be useful.

> Well to keep everyone on the same page.  Here is my history.
> 
> 
>   1.  I did install RDO (allinone host) using the bellow steps
>   https://openstack.redhat.com/Quickstart 2.  Then I have used the
>   following steps for floating IP
>   https://openstack.redhat.com/Floating_IP_range.
> 
> My situtation is as follows.  * Floating IP address assignment: I have
> assigned a floating IP , I did follow this steps.
> https://openstack.redhat.com/Floating_IP_range
> 
> * Bridge configuration:My Ethernet device eth0(actually in Redhat 7 it
> is eno1 name)is on the same bridge as the compute host Yes, ethernet
> device on 10.48.146.78 address and br-ex interface on 10.48.146.112
> 
> * DHCP configuration: Yes, DHCP configuration is set and Neutron
> hearing and responding to DHCP requests and the instance is getting IP
> from 10.48.146.113 (next hop) however I cannot ping/ssh to that IP
> address (ICMP/SSH is added allowed rule on default security group)
>
> 
> Here is the little diagram of my system.
> [cid:EB813931-0B05-459C-A0B6-DE7C98D3D2FA]
> 
> Can someone help to find what is missing.
 
If this is your first attempt at setting up Neutron, you might want to
go through this:

    http://docs.openstack.org/openstack-ops/content/network_troubleshooting.html

Here's some old example of some `tcpdump` analysis[*] on different
interfaces:

    https://gist.github.com/kashyapc/7926517

In general, when dealing with Neutron, systematic debugging will help a
lot to narrow down the root cause.

[*] https://gist.github.com/kashyapc/7926517

-- 
/kashyap