Comment 21 for bug 1471637

Reviewed: https://review.opencontrail.org/12923
Committed: http://github.org/Juniper/contrail-controller/commit/6b46e72b0bfb81ba8a0d2e448976d8d606ff6ae6
Submitter: Zuul
Branch: master

commit 6b46e72b0bfb81ba8a0d2e448976d8d606ff6ae6
Author: Manish <email address hidden>
Date: Tue Aug 4 01:47:26 2015 +0530

Add support for l3 mode in agent.

There are three forwarding modes at VN level and global level-
l2_l3(IRB), l3 only(v4+v6), l2 only.
VN level configuration is always at highest priority.
In case VN level forwarding mode is not configured then global
mode is consulted.

For multicast store the knowledge of bridging enabled in local peer path. This
helps in identifying if EVPN/TOR subscription/withdraw needs to be sent.

Partial-Bug: 1471637
(cherry picked from commit c87a0cf76778d083082ddf19ac79bc9fdb7fec1a)

Conflicts:
 src/vnsw/agent/oper/vn.cc
 src/vnsw/agent/oper/vn.h

Change-Id: I03f5a883f39c7bc47f7adb8feb1cef949e746755