[ovs-build] Fixed: ovn-org/ovn#7 (master - 3afe870)

[Travis CI]

Build Update for ovn-org/ovn
-------------------------------------

Build: #7
Status: Fixed

Duration: 24 mins and 49 secs
Commit: 3afe870 (master)
Author: Dumitru Ceara
Message: ovn-northd: Limit ARP/ND broadcast domain whenever possible.

ARP request and ND NS packets for router owned IPs were being
flooded in the complete L2 domain (using the MC_FLOOD multicast group).
However this creates a scaling issue in scenarios where aggregation
logical switches are connected to more logical routers (~350). The
logical pipelines of all routers would have to be executed before the
packet is finally replied to by a single router, the owner of the IP
address.

This commit limits the broadcast domain by bypassing the L2 Lookup stage
for ARP requests that will be replied by a single router. The packets
are forwarded only to the router port that owns the target IP address.

IPs that are owned by the routers and for which this fix applies are:
- IP addresses configured on the router ports.
- VIPs.
- NAT IPs.

Reported-at: https://bugzilla.redhat.com/1756945
Reported-by: Anil Venkata <vkommadi at redhat.com>
Signed-off-by: Dumitru Ceara <dceara at redhat.com>
Signed-off-by: Han Zhou <hzhou at ovn.org>

View the changeset: https://github.com/ovn-org/ovn/compare/65d601cd7550...3afe8704783f

View the full build log and details: https://travis-ci.org/ovn-org/ovn/builds/610959743?utm_medium=notification&utm_source=email

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