Cisco plugin should check for switch - vlan bindings

[Arvind Somya]

The Cisco plugin currently doesn't check for a switch - vlan binding before trying to recreate it when a create_port is invoked. This leads to failures in cases where an SVI interface has been created before starting instances via neutron router - subnet associations.

The plugin needs to be modified in create_network to check if there is already a switch - vlan binding and only trunk the vlan if there is already one otherwise create_and_trunk.

[Thierry Carrez (ttx)]

Removing RC1 milestone for havana-rc-potential bugs: those are nice to have, not release blockers.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/49023
Committed: http://github.com/openstack/neutron/commit/7da3d24f8ad0a5cb03c6e310a3f0d176a8476423
Submitter: Jenkins
Branch: master

commit 7da3d24f8ad0a5cb03c6e310a3f0d176a8476423
Author: Arvind Somya <email address hidden>
Date: Mon Sep 30 13:56:59 2013 -0400

    Cisco plugin should check for switch - vlan bindings

    This commit fixes the issue where the Cisco plugin tries to create a
    vlan twice on a switch if the first create is not bound to a port.
    Also fixes an issue where the plugin tried to untrunk vlans from
    a port for SVI interfaces.

    Change-Id: Ifb13eb65d667367cffe120e1761d34f09b6d356d
    Fixes: Bug #1233300