!
{% for route_gr in old_mroute %}
{%   for nh in old_mroute[route_gr] %}
{%     if old_mroute[route_gr][nh] %}
no ip mroute {{ route_gr }} {{ nh }} {{ old_mroute[route_gr][nh] }}
{%     else %}
no ip mroute {{ route_gr }} {{ nh }}
{%     endif %}
{%   endfor %}
{% endfor %}
{% for route_gr in mroute %}
{%   for nh in mroute[route_gr] %}
{%     if mroute[route_gr][nh] %}
ip mroute {{ route_gr }} {{ nh }} {{ mroute[route_gr][nh] }}
{%     else %}
ip mroute {{ route_gr }} {{ nh }}
{%     endif %}
{%   endfor %}
{% endfor %}
!