IGMP proxy support flag should be set to 1 in multicast community

[vimal]

1]IGMP proxy support flag should be set to 1 in multicast community. Since this flag is not set multicast traffic is flooded by qfx.

2] Ether tag should be set to vxlan

(details in AT : https://gnats.juniper.net/web/default/1393582#audit_tab)

show commands
-----------------

(route sent by contrail)
3:10.10.15.27:2::100::10.10.15.27/248 IM (1 entry, 1 announced)
        *BGP Preference: 170/-101
                Route Distinguisher: 10.10.15.27:2
                PMSI: Flags 0x80: Label 6: Type INGRESS-REPLICATION 10.10.15.27
                Next hop type: Indirect, Next hop index: 0
                Address: 0xccd6a70
                Next-hop reference count: 6
                Source: 10.10.15.24
                Protocol next hop: 10.10.15.27
                Indirect next hop: 0x2 no-forward INH Session ID: 0x0
                State: <Secondary Active Int Ext>
                Local AS: 64512 Peer AS: 64512
                Age: 40:10 Metric: 200 Metric2: 0
                Validation State: unverified
                Task: BGP_64512.10.10.15.24
                Announcement bits (1): 0-default-switch-evpn
                AS path: ?
                Communities: target:64512:8000002 encapsulation:vxlan(0x8) evpn-etree:0x0:root (label 0) evpn-mcast-flags:0x0 unknown type 0x8071:0xfc00:0x4 <<<<<<<<<<<<<<<<<<<<<<<<<<<<

(route sent by qfx)

[edit]
regress@vale8-bng-systest# run show route table default-switch.evpn.0 match-prefix 3:3.3.3.1:1::1::3.3.3.1/248 extensive
Oct 10 02:27:49

default-switch.evpn.0: 32 destinations, 52 routes (32 active, 0 holddown, 0 hidden)
3:3.3.3.1:1::1::3.3.3.1/248 IM (2 entries, 1 announced)
        *BGP Preference: 170/-101
                Route Distinguisher: 3.3.3.1:1
                PMSI: Flags 0x0: Label 0: Type INGRESS-REPLICATION 3.3.3.1
                Next hop type: Indirect, Next hop index: 0
                Address: 0xccf0370
                Next-hop reference count: 36
                Source: 3.3.3.1
                Protocol next hop: 3.3.3.1
                Indirect next hop: 0x2 no-forward INH Session ID: 0x0
                State: <Secondary Active Int Ext>
                Local AS: 65301 Peer AS: 65100
                Age: 2:53:02 Metric2: 0
                Validation State: unverified
                Task: BGP_65100_65100.3.3.3.1
                Announcement bits (1): 0-default-switch-evpn
                AS path: I
                Communities: target:1:1 encapsulation:vxlan(0x8) evpn-mcast-flags:0x1:snooping-enabled

build
--------------

ocata-master-294 with private vrouter binary

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/46943
Submitter: Nikhil Bansal (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/46943
Committed: http://github.com/Juniper/contrail-controller/commit/5759e37cade23767cd50c6c2e373757b5a7183ad
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit 5759e37cade23767cd50c6c2e373757b5a7183ad
Author: Nikhil Bansal <email address hidden>
Date: Fri Oct 12 15:22:51 2018 +0530

Setting mflag value to 1

Multiple changes:
1. Multicast flag values needs to be set to 1
2. source ip should not be part of route for <*, G>
3. Taking care of earlier comments

Change-Id: Id5c4b0b89a8a0efdd17bc93b30a833dea3e89cc7
Closes-Bug: #1797295