Recently, I have started playing with angular 2. It's awesome so far. So, i have started a demo personal project for the sake of learning using `angular-cli`.

With the basic routing setup, I now want to navigate to some routes from header, but since my header is a parent to the `router-outlet`, I receive this error.

**app.component.html**

```html
<app-header></app-header> // Trying to navigate from this component
    <router-outlet></router-outlet>
<app-footer></app-footer>

```

**header.component.html**

```html
<a [routerLink]="['/signin']">Sign in</a>

```

Now I understand partially I guess that since that component is a wrapper around `router-outlet` it would not be possible this way to access `router`. So, is there a possibility to access navigation from outside for a scenario like this?

I would be really happy to add any more information if needed. Thank you in advance.

**Update**

1- My `package.json` already has the stable `@angular/router 3.3.1` version.
2- In my main `app` module, I have imported the `routing-module`. Please see below.

**app.module.ts**

```
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { AlertModule  } from 'ng2-bootstrap';
import { LayoutModule } from './layout/layout.module';
import { UsersModule } from './users/users.module';
import { AppRoutingModule } from  './app-routing.module';
import { AppComponent } from './app.component';
import { PageNotFoundComponent } from './shared/components/not-found.component';

@NgModule({
  declarations: [
    AppComponent,
    PageNotFoundComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    AlertModule.forRoot(),
    LayoutModule,
    UsersModule,
    AppRoutingModule  --> This is the routing module. 
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

```

**app-routing.module.ts**

```
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { SigninComponent } from './users/signin/signin.component';
import { PageNotFoundComponent } from './shared/components/not-found.component';

const routes: Routes = [
{ path: '**', component: PageNotFoundComponent }
];

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

export class AppRoutingModule {}

```

The route I am trying to access is delegated from another `module` that is the `UsersModule`

**user-routing.module.ts**

```
import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { SigninComponent } from './signin/signin.component';

const usersRoutes: Routes = [
  { path: 'signin',  component: SigninComponent }
];
@NgModule({
  imports: [
    RouterModule.forChild(usersRoutes)
  ],
  exports: [
    RouterModule
  ]
})

export class UsersRoutingModule { }

```

While I am trying to navigate from a component that is part of the `Layout` module, but has no notion of the router module. Is that what is causing the error.

**Layout.module.ts**

```
import { NgModule } from '@angular/core';
import { HeaderComponent } from './header/header.component';
import { FooterComponent } from './footer/footer.component';

@NgModule({
  declarations: [HeaderComponent, FooterComponent],
  exports: [HeaderComponent, FooterComponent]
})
export class LayoutModule{}

```

I am trying to navigate from the `HeaderComponent`. I would be happy to provide more information if needed.