def vdp_vlan_change(self, vsw_cb_data, vdp_vlan, fail_reason):
LOG.debug("<STR_LIT>" % vdp_vlan)<EOL>try:<EOL><INDENT>with self.ovs_vdp_lock:<EOL><INDENT>self.vdp_vlan_change_internal(vsw_cb_data, vdp_vlan,<EOL>fail_reason)<EOL><DEDENT><DEDENT>except Exception as e:<EOL><INDENT>LOG.error("<STR_LIT>" % str(e))<EOL><DEDENT>
Callback Function from VDP when provider VLAN changes.

        This will be called only during error cases when switch
        reloads or when compute reloads.