Refer to the exhibit. A network administrator is configuring OSPF advanced configuration parameters from a template using the vManage GUI for a branch WAN Edge router to calculate the summary routes…

In OSPF, an Autonomous System Boundary Router (ASBR) is responsible for originating external routes (as Type 5 LSAs) into the OSPF domain. Enabling 'Originate' in the OSPF configuration on a WAN Edge router allows it to act as an ASBR, advertising routes learned from other sources (such as OMP or connected interfaces) into OSPF, which is crucial for inter-domain routing and potential summary route calculation.

Disabling RFC 1583 Compatible mode affects how external routes are preferred in specific multi-area scenarios but does not directly enable the router to originate summary routes as an ASBR.

Disabling the 'Originate' option would prevent the WAN Edge router from acting as an ASBR and injecting external routes into OSPF, which contradicts the requirement to contribute to summary route calculation.

Enabling RFC 1583 Compatible mode relates to specific OSPF external route calculation rules and is not the mechanism for an ASBR to originate routes or summaries.