how to pass route params in [routerLink] angular 2

You can work with queryParams which works with routerLink to build the url. For ex:

<a [routerLink]="['/profiles']" 
[queryParams]="{min:45,max:50,location:29293}">
  Search
</a>

This will build a route like http://localhost:3000/profiles?min=45&max=50&location=29923

Good Luck.

you can try the code below: Your ts file will be like this:

@Component({ ... })
@Routes([
    {
        path: '/auth/signup?cell=1654654654', component: AuthComponent
    }
])
export class AppComponent  implements OnInit {
    constructor(private router: Router) {}
}

And in you html file,

<a [routerLink]="['//auth/signup?cell=1654654654']"></a>

If your are going to use angula2 beta then you have to send parameter like this while doing routing.

<a [routerLink]="['signup',{cell:cellValue}]">Routing with parameter</a>                        
<input type='text' [(ngModel)]='cellValue'>

and than in the receiving side than you have to get parameter via using RouteParams.

nut if You are going to use angular2 RC than you have to use RouteSegment instead of using RouteParams in angular2 RC. like this :-

import { Component } from '@angular/core';

import { Routes, RouteSegment, ROUTER_DIRECTIVES } from '@angular/router';

@Component({
  selector: 'about-item',
  template: `<h3>About Item Id: {{id}}</h3>`,
  Directives: [ROUTER_DIRECTIVES]
})

class AboutItemComponent { 

  id: any;

  constructor(routeSegment: RouteSegment) {
    this.id = routeSegment.getParam('id');    
  }
}

@Component({

    selector: 'app-about',

    template: `

      <h2>About</h2>
        <a [routerLink]="['/about/item', 1]">Item 1</a>
        <a [routerLink]="['/about/item', 2]">Item 2</a>
      <div class="inner-outlet">
        <router-outlet></router-outlet>
      </div>
    `,
    directives: [ROUTER_DIRECTIVES]
})

@Routes([

  { path: '/item/:id', component: AboutItemComponent }

])

export class AboutComponent { }