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

Richard Raseley richard at raseley.com
Wed Dec 16 18:44:21 UTC 2015

Are the gateway nodes virtualized? If so, are you allowing promiscuous mode / MAC spoofing?

> On Dec 16, 2015, at 4:19 AM, Li Ma <skywalker.nick at gmail.com> wrote:
> Updated:
> 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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