ngx-admin/src/app/app-routing.module.ts

import { ExtraOptions, RouterModule, Routes } from '@angular/router';
import { NgModule } from '@angular/core';

const routes: Routes = [
  // {path: 'admin'}
  {path: 'pages', loadChildren: 'app/pages/pages.module#PagesModule'},
  {path: '', redirectTo: 'pages', pathMatch: 'full'},
  {path: '**', redirectTo: 'pages'}
];

const config: ExtraOptions = {
  useHash: true
};

@NgModule({
  imports: [RouterModule.forRoot(routes, config)],
  exports: [RouterModule]
})
export class AppRoutingModule {
}