[R2.20]DM: use VNID for IRB interface rather than VxLAN ID

[amit surana]

Using the VxLAN id for numbering the IRB interface is not a good idea as the legal junos interface-range tops out at 16k.

Figure out a scheme such that we pick an available number within the valid interface-range. Could use the same that is used for si-*.

VxLAN id of 50000 was configured. Resulting config:

_contrail_l2_6206_vn2 {
    vtep-source-interface lo0.0;
    instance-type virtual-switch;
    vrf-import _contrail_l2_6206_vn2-import;
    vrf-export _contrail_l2_6206_vn2-export;
    protocols {
        evpn {
            encapsulation vxlan;
            extended-vni-list all;
        }
    }
    bridge-domains {
        bd-500000 {
            vlan-id none;
            routing-interface irb.50000;
            vxlan {
                vni 500000;
            }
        }
    }

root@cmbu-tasman# commit check
error: 'irb.50000' is not a valid interface-range or alias name

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/12044
Submitter: Suresh Balineni (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/12044
Committed: http://github.org/Juniper/contrail-controller/commit/d238b375fb33c138dbd2a9d895d08a99077033b2
Submitter: Zuul
Branch: R2.20

commit d238b375fb33c138dbd2a9d895d08a99077033b2
Author: sbalineni <email address hidden>
Date: Thu Jun 25 18:23:15 2015 -0700

DM: Use vn-id for configuring irb interfaces

- currently vxlan id is used for configuring irb unit numbers.
MX does not allow more than 16k.

- filter configuration:
destination-address should emebedded in a seperate xml element.

Change-Id: Id06cc8859467ecaa204dd8c5403f8ee2a7f662c3
Closes-Bug: #1468921
Closes-Bug: #1468929

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/12117
Submitter: Suresh Balineni (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/12117
Committed: http://github.org/Juniper/contrail-controller/commit/b40fc7396b9687829d099433dd26528cfe625b7b
Submitter: Zuul
Branch: master

commit b40fc7396b9687829d099433dd26528cfe625b7b
Author: sbalineni <email address hidden>
Date: Tue Jun 30 17:30:51 2015 -0700

DM: porting fixes from R2.20 to main

Change-Id: I45e9a34f0ea36776ecd1f2066ad20fb2833d88ce
Closes-Bug: #1468929
Closes-Bug: #1468921