OSPF route summarization

Hello,

Different vendors have different implementation methods. 

For Vendor C, the cost of the summarized route is the lowest cost of specific routes.

For Huawei, the cost of the summarized route is the highest cost of specific routes.

The details are as follows:

When summarizing the routes on  ABR (abr-summary), by default, the cost of the summarized route is the highest cost of specific routes.

When summarizing the routes imported by OSPF(asbr-summary), by default, for Type 1 external routes, the cost of the summarized route is the highest cost of specific routes; for Type 2 external routes, the cost of the summarized route equals the highest cost of specific routes plus 1.