Support for unrestricted proxy ARP attribute on vm-interface

[Praveen]

Service chaining works on assumption that packets are routed in following scenarios,
1. Transparent Service-Chain
   - Packets to and from left interface of service-instance
   - Packets to and from right interface of service-instance
2. In-Network Service-Chain
   - Packets to and from left interface of service-instance
   - Packets to and from right interface of service-instance
3. In-Network Nat Service-Chain
   - Packets to and from left interface of service-instance

To ensure packets transmitted from the interfaces given above, VRouter must implement unrestricted proxy-ARP on these interfaces.

Service-Instance interfaces have an attribute named “virtual-machine-interface-properties service-interface-type” which can be used by Agent to set "unrestricted proxy-arp" attribute. However, its preferable to have "unrestricted proxy-arp" as a new attribute so that it gives flexibility and can be used in other scenarios.

Note:
In R3.2 and below VRouter relies on vrf-assignment rule on the interfaces for routing. Packets transmitted from service-interface go thru vrf-assignment rules and result in vrf-translation. Any packet that goes thru vrf-translation will always be routed by VRouter.

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/27562
Submitter: Praveen K V (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/27674
Submitter: Hari Prasad Killi (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/28758
Submitter: Praveen K V (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/29165
Submitter: Praveen K V (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/29165
Committed: http://github.org/Juniper/contrail-controller/commit/58a209e3c0176672ce0cdf612713a556f730771f
Submitter: Zuul (<email address hidden>)
Branch: master

commit 58a209e3c0176672ce0cdf612713a556f730771f
Author: Praveen K V <email address hidden>
Date: Sat Dec 24 14:43:41 2016 +0530

Support for unrestricted proxy-arp on vm-interface

Enable unrestricted-proxy arp flag on vm-interface when vrf-assign rule
is found on "left" or "right" service-instance interface

Change-Id: Ib5b511ca737a10ca56e862f3a95688449cd830d0
Closes-Bug: #1651026
Partial-Bug: #1648696
Partial-Bug: #1645978

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/33916
Submitter: Naveen N (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/33916
Committed: http://github.com/Juniper/contrail-controller/commit/3d2e717f1548e5e227463e8ec938708187162b75
Submitter: Zuul (<email address hidden>)
Branch: R3.2

commit 3d2e717f1548e5e227463e8ec938708187162b75
Author: Praveen K V <email address hidden>
Date: Sat Dec 24 14:43:41 2016 +0530

Support for unrestricted proxy-arp on vm-interface

Enable unrestricted-proxy arp flag on vm-interface when vrf-assign rule
is found on "left" or "right" service-instance interface

Change-Id: I59a77c4af362d5cfbc9c73c68e8fe479d627c67b
Closes-Bug: #1651026
Partial-Bug: #1648696
Partial-Bug: #1645978