zhiyuan_cai 8dd1b87e26 L3 North-South Networking
Implement l3 north-south networking functionality. In our current
design, external network is hosted in one of the bottom pod, VMs
hosted in other bottom pods are connected to this external network
via a bridge network, using the same physical network as the east-
west networking, but different vlan.

Change-Id: I953322737aa97b2d1ebd9a15dc479d7aba753678
2016-02-05 15:10:41 +08:00
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2016-02-05 15:10:41 +08:00