There are two types of landing gateway priorities, one is the total priority of landing, and the other is the special prefix priority.
Total priority of landing:
Adjust by directly setting the priority. The lower the value, the higher the priority, and the negative number can be used.
Landing special prefix priority:
11 prefix, callee2 priority is greater than callee1 (when the priority is set in the gateway prefix, the priority column is invalid)
22 prefix, callee2 has a lower priority than callee1