func resourceNetworkingRouterV2Update(d *schema.ResourceData, meta interface{}) error {
	routerId := d.Id()
	osMutexKV.Lock(routerId)
	defer osMutexKV.Unlock(routerId)

	config := meta.(*Config)
	networkingClient, err := config.networkingV2Client(d.Get("region").(string))
	if err != nil {
		return fmt.Errorf("Error creating OpenStack networking client: %s", err)
	}

	var updateOpts routers.UpdateOpts
	if d.HasChange("name") {
		updateOpts.Name = d.Get("name").(string)
	}
	if d.HasChange("admin_state_up") {
		asu := d.Get("admin_state_up").(bool)
		updateOpts.AdminStateUp = &asu
	}
	if d.HasChange("external_gateway") {
		externalGateway := d.Get("external_gateway").(string)
		if externalGateway != "" {
			gatewayInfo := routers.GatewayInfo{
				NetworkID: externalGateway,
			}
			updateOpts.GatewayInfo = &gatewayInfo
		}
	}

	log.Printf("[DEBUG] Updating Router %s with options: %+v", d.Id(), updateOpts)

	_, err = routers.Update(networkingClient, d.Id(), updateOpts).Extract()
	if err != nil {
		return fmt.Errorf("Error updating OpenStack Neutron Router: %s", err)
	}

	return resourceNetworkingRouterV2Read(d, meta)
}