[openstack-dev] [midonet] ping cannot work from VM to external gateway IP.

Li Ma skywalker.nick at gmail.com
Wed Dec 16 12:19:41 UTC 2015


Lots of ARP requests from external physical router to VM are catched
on the physical NIC binded to provider router port.

It seems that external physical router doesn't get answers to these
ARP requests.

On Wed, Dec 16, 2015 at 8:08 PM, Li Ma <skywalker.nick at gmail.com> wrote:
> Hi Midoers,
> I have a platform running Midonet 2015 (I think it is the last release
> when you switch to 5.0).
> I cannot ping from VM to external gateway IP (which is set up at the
> physical router side).
> VM inter-connectivity is OK.
> When I tcpdump packets on the physical interface located in the gateway node,
> I just grabbed lots of ARP requests to external gateway IP.
> I'm not sure how midonet gateway manages ARP?
> Will the ARP be cached on the gateway host?
> Can I specify a static ARP record by 'ip command' on gateway node to
> solve it quickly (not gracefully)?
> (Currently I'm in the business trip that cannot touch the environment.
> So, I'd like to get some ideas first and then I can tell my partners
> to work on it.)
> Thanks a lot,
> --
> Li Ma (Nick)
> Email: skywalker.nick at gmail.com


Li Ma (Nick)
Email: skywalker.nick at gmail.com

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