why page is reload in nav.link react-bootstrap code example

Example: react-bootstrap navbar nav link refreshes page

import { Route, RouteHandler, Link } from 'react-router';
import AuthService from '../services/AuthService'
import { Button, Nav, Navbar, NavDropdown, MenuItem, NavItem } from 'react-bootstrap';
import { LinkContainer } from 'react-router-bootstrap';

/// In the render() method
<Nav pullRight>
  <LinkContainer to="/home">
    <NavItem eventKey={1}>Home</NavItem>
  </LinkContainer>
  <LinkContainer to="/book">
    <NavItem eventKey={2}>Book Inv</NavItem>
  </LinkContainer>
  <NavDropdown eventKey={3} title="Authorization" id="basic-nav-dropdown">
    <LinkContainer to="/logout">
      <MenuItem eventKey={3.1}>Logout</MenuItem>    
    </LinkContainer>      
  </NavDropdown>  
</Nav>