code: func routeLocal(iface *net.Interface, vip net.IP, node seesaw.Host) error {
  	af := seesaw.IPv6
  	src := node.IPv6Addr
  	if vip.To4() != nil {
  		af = seesaw.IPv4
  		src = node.IPv4Addr
  	}
  	if err := removeLocalRoutes(vip); err != nil {
  		return err
  	}
  	return ipRunAF(af, "route add table local local %s dev %s src %s", vip, iface.Name, src)
  }
docs: // routeLocal removes all routes in the local routing table for the given VIP
  // and adds new routes with the correct source address.